# What is CVE-2021-0289? > CVE-2021-0289 is a medium-severity flaw (CVSS 5.3) in Junos from Juniper, published on 15 July 2021. It is not on the list of flaws known to be exploited today. The latest forecast puts its chance of use in the next 30 days at 0.3%. If you run an affected version, plan in the vendor’s fix. Canonical page: https://www.precursorintelligence.com/what-is/cve-2021-0289 ## At a glance - **Verdict:** Plan it in. No sign of exploitation and a low forecast. Patch it in your normal update cycle. - **Precursor Intelligence risk score:** 21 out of 100 (Low); action: Monitor. Kept up to date as the evidence changes. - **Severity:** Medium (CVSS 5.3 out of 10) - **Known to be exploited:** No, not on the list of flaws known to be exploited today - **Chance of use in the next 30 days:** 0.3% (latest exploit-likelihood forecast) - **Published:** 15 July 2021 - **Record last updated:** 28 July 2021 - **Main product:** Junos from Juniper - **Affected products:** 229 ## What is CVE-2021-0289? In plain terms An attacker has to be on the same local network without logging in, and nobody has to click anything. If it works, the attacker can take it offline. ### The official description When user-defined ARP Policer is configured and applied on one or more Aggregated Ethernet (AE) interface units, a Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability between the Device Control Daemon (DCD) and firewall process (dfwd) daemons of Juniper Networks Junos OS allows an attacker to bypass the user-defined ARP Policer. In this particular case the User ARP policer is replaced with default ARP policer. To review the desired ARP Policers and actual state one can run the command "show interfaces extensive" and review the output. See further details below. An example output is: show interfaces extensive | match policer Policer: Input: __default_arp_policer__ <<< incorrect if user ARP Policer was applied on an AE interface and the default ARP Policer is displayed Policer: Input: jtac-arp-ae5.317-inet-arp <<< correct if user ARP Policer was applied on an AE interface For all platforms, except SRX Series: This issue affects Juniper Networks Junos OS: All versions 5.6R1 and all later versions prior to 18.4 versions prior to 18.4R2-S9, 18.4R3-S9 with the exception of 15.1 versions 15.1R7-S10 and later versions; 19.4 versions prior to 19.4R3-S3; 20.1 versions prior to 20.1R3; 20.2 versions prior to 20.2R3-S2; 20.3 version 20.3R1 and later versions; 20.4 versions prior to 20.4R3; 21.1 versions prior to 21.1R2; This issue does not affect Juniper Networks Junos OS versions prior to 5.6R1. On SRX Series this issue affects Juniper Networks Junos OS: 18.4 versions prior to 18.4R2-S9, 18.4R3-S9; 19.4 versions prior to 19.4R3-S4; 20.1 versions prior to 20.1R3; 20.2 versions prior to 20.2R3-S2; 20.3 version 20.3R1 and later versions; 20.4 versions prior to 20.4R3; 21.1 versions prior to 21.1R2. This issue does not affect 18.4 versions prior to 18.4R1 on SRX Series. This issue does not affect Junos OS Evolved. ### What kind of flaw is it? - CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition ### How an attack on it works - Where an attacker can be: On the same local network - How hard it is to pull off: Hard: conditions must line up - Login needed first: No login needed - Does someone have to click: No, nobody has to do anything - What an attacker gets: Can take it offline Severity vector: `CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H` ## Is CVE-2021-0289 being exploited? Not that we know of It is not on the list of flaws known to be exploited today. The latest forecast puts the chance of it being used in the next 30 days at 0.3%. That can change at any time, which is why we keep watching. Exploit likelihood over the last 7 days: 0.3%, 0.3%, 0.3%, 0.3%, 0.3%, 0.3%, 0.3%. ### Timeline - 15 July 2021: Published - 28 July 2021: Record last updated ### How Precursor Intelligence ranks it CVE-2021-0289 scores **21 out of 100 (Low)**, with the action "Monitor". Every published flaw gets a risk score from 0 to 100, kept up to date as the evidence changes. Four things go into the score, from the one that counts most to the ones that count less: - Evidence it is being exploited: biggest factor - How severe it is: strong factor - How widely exposed it is: smaller factor - Threat activity around it: smaller factor 85 and above is Critical. Anything confirmed as exploited is always marked for an emergency patch, whatever its score. When this flaw matches software you track, it lands in your list with its score and the reasons behind it. ## Who is affected by CVE-2021-0289? The published record lists 229 products. Versions are as published: "5.7 to before 15.1" means from 5.7 up to, but not including, 15.1. - [Junos](https://www.precursorintelligence.com/product/juniper/junos) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Operating system): 5.6-r1, 5.7 to before 15.1, 15.2 to before 18.4, 18.4, 18.4-r1, 18.4-r1-s1, 18.4-r1-s2, 18.4-r1-s3, 18.4-r1-s4, 18.4-r1-s5, 18.4-r1-s6, 18.4-r1-s7, 18.4-r2, 18.4-r2-s1, 18.4-r2-s2, 18.4-r2-s3, 18.4-r2-s4, 18.4-r2-s5, 18.4-r2-s6, 18.4-r2-s7, 18.4-r2-s8, 18.4-r3, 18.4-r3-s1, 18.4-r3-s2, 18.4-r3-s3, 18.4-r3-s4, 18.4-r3-s5, 18.4-r3-s6, 18.4-r3-s7, 18.4-r3-s8, 19.4-r1, 19.4-r1-s1, 19.4-r1-s2, 19.4-r1-s3, 19.4-r2, 19.4-r2-s1, 19.4-r2-s2, 19.4-r2-s3, 19.4-r3, 19.4-r3-s1 and 28 more - [Netscreen-Idp](https://www.precursorintelligence.com/product/juniper/netscreen-idp) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): 3.0, 3.0r1, 3.0r2 - [Jatp](https://www.precursorintelligence.com/product/juniper/jatp) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): 400, 700 - [Acx1000](https://www.precursorintelligence.com/product/juniper/acx1000) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Acx1100](https://www.precursorintelligence.com/product/juniper/acx1100) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Acx2000](https://www.precursorintelligence.com/product/juniper/acx2000) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Acx2100](https://www.precursorintelligence.com/product/juniper/acx2100) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Acx2200](https://www.precursorintelligence.com/product/juniper/acx2200) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Acx4000](https://www.precursorintelligence.com/product/juniper/acx4000) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Acx500](https://www.precursorintelligence.com/product/juniper/acx500) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Acx5000](https://www.precursorintelligence.com/product/juniper/acx5000) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Acx5048](https://www.precursorintelligence.com/product/juniper/acx5048) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Acx5096](https://www.precursorintelligence.com/product/juniper/acx5096) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Acx5400](https://www.precursorintelligence.com/product/juniper/acx5400) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Acx5448](https://www.precursorintelligence.com/product/juniper/acx5448) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Acx5800](https://www.precursorintelligence.com/product/juniper/acx5800) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Acx6300](https://www.precursorintelligence.com/product/juniper/acx6300) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Acx6360](https://www.precursorintelligence.com/product/juniper/acx6360) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Acx710](https://www.precursorintelligence.com/product/juniper/acx710) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Atp400](https://www.precursorintelligence.com/product/juniper/atp400) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Atp700](https://www.precursorintelligence.com/product/juniper/atp700) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Csrx](https://www.precursorintelligence.com/product/juniper/csrx) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ctp150](https://www.precursorintelligence.com/product/juniper/ctp150) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ctp2008](https://www.precursorintelligence.com/product/juniper/ctp2008) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ctp2024](https://www.precursorintelligence.com/product/juniper/ctp2024) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ctp2056](https://www.precursorintelligence.com/product/juniper/ctp2056) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Dx](https://www.precursorintelligence.com/product/juniper/dx) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): 5.1 - [EX Rps](https://www.precursorintelligence.com/product/juniper/ex_rps) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ex2200](https://www.precursorintelligence.com/product/juniper/ex2200) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ex2200-C](https://www.precursorintelligence.com/product/juniper/ex2200-c) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ex2200-Vc](https://www.precursorintelligence.com/product/juniper/ex2200-vc) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ex2300](https://www.precursorintelligence.com/product/juniper/ex2300) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ex2300-C](https://www.precursorintelligence.com/product/juniper/ex2300-c) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ex2300m](https://www.precursorintelligence.com/product/juniper/ex2300m) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ex3200](https://www.precursorintelligence.com/product/juniper/ex3200) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ex3300](https://www.precursorintelligence.com/product/juniper/ex3300) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ex3300-Vc](https://www.precursorintelligence.com/product/juniper/ex3300-vc) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ex3400](https://www.precursorintelligence.com/product/juniper/ex3400) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ex4200](https://www.precursorintelligence.com/product/juniper/ex4200) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ex4200-Vc](https://www.precursorintelligence.com/product/juniper/ex4200-vc) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ex4300](https://www.precursorintelligence.com/product/juniper/ex4300) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ex4300-24p](https://www.precursorintelligence.com/product/juniper/ex4300-24p) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ex4300-24p-S](https://www.precursorintelligence.com/product/juniper/ex4300-24p-s) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ex4300-24t](https://www.precursorintelligence.com/product/juniper/ex4300-24t) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ex4300-24t-S](https://www.precursorintelligence.com/product/juniper/ex4300-24t-s) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ex4300-32f](https://www.precursorintelligence.com/product/juniper/ex4300-32f) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ex4300-32f-Dc](https://www.precursorintelligence.com/product/juniper/ex4300-32f-dc) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ex4300-32f-S](https://www.precursorintelligence.com/product/juniper/ex4300-32f-s) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ex4300-48mp](https://www.precursorintelligence.com/product/juniper/ex4300-48mp) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ex4300-48mp-S](https://www.precursorintelligence.com/product/juniper/ex4300-48mp-s) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ex4300-48p](https://www.precursorintelligence.com/product/juniper/ex4300-48p) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ex4300-48p-S](https://www.precursorintelligence.com/product/juniper/ex4300-48p-s) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ex4300-48t](https://www.precursorintelligence.com/product/juniper/ex4300-48t) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ex4300-48t-Afi](https://www.precursorintelligence.com/product/juniper/ex4300-48t-afi) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ex4300-48t-Dc](https://www.precursorintelligence.com/product/juniper/ex4300-48t-dc) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ex4300-48t-Dc-Afi](https://www.precursorintelligence.com/product/juniper/ex4300-48t-dc-afi) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ex4300-48t-S](https://www.precursorintelligence.com/product/juniper/ex4300-48t-s) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ex4300-48tafi](https://www.precursorintelligence.com/product/juniper/ex4300-48tafi) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ex4300-48tdc](https://www.precursorintelligence.com/product/juniper/ex4300-48tdc) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ex4300-48tdc-Afi](https://www.precursorintelligence.com/product/juniper/ex4300-48tdc-afi) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ex4300-Mp](https://www.precursorintelligence.com/product/juniper/ex4300-mp) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ex4300-Vc](https://www.precursorintelligence.com/product/juniper/ex4300-vc) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ex4300m](https://www.precursorintelligence.com/product/juniper/ex4300m) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ex4400](https://www.precursorintelligence.com/product/juniper/ex4400) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ex4500](https://www.precursorintelligence.com/product/juniper/ex4500) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ex4500-Vc](https://www.precursorintelligence.com/product/juniper/ex4500-vc) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ex4550](https://www.precursorintelligence.com/product/juniper/ex4550) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ex4550-Vc](https://www.precursorintelligence.com/product/juniper/ex4550-vc) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - Ex4550/vc by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ex4600](https://www.precursorintelligence.com/product/juniper/ex4600) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ex4600-Vc](https://www.precursorintelligence.com/product/juniper/ex4600-vc) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ex4650](https://www.precursorintelligence.com/product/juniper/ex4650) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ex6200](https://www.precursorintelligence.com/product/juniper/ex6200) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ex6210](https://www.precursorintelligence.com/product/juniper/ex6210) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ex8200](https://www.precursorintelligence.com/product/juniper/ex8200) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ex8200-Vc](https://www.precursorintelligence.com/product/juniper/ex8200-vc) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ex8208](https://www.precursorintelligence.com/product/juniper/ex8208) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ex8216](https://www.precursorintelligence.com/product/juniper/ex8216) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ex9200](https://www.precursorintelligence.com/product/juniper/ex9200) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ex9204](https://www.precursorintelligence.com/product/juniper/ex9204) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ex9208](https://www.precursorintelligence.com/product/juniper/ex9208) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ex9214](https://www.precursorintelligence.com/product/juniper/ex9214) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ex9250](https://www.precursorintelligence.com/product/juniper/ex9250) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ex9251](https://www.precursorintelligence.com/product/juniper/ex9251) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ex9253](https://www.precursorintelligence.com/product/juniper/ex9253) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Fips Infranet Controller 6500](https://www.precursorintelligence.com/product/juniper/fips_infranet_controller_6500) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Fips Secure Access 4000](https://www.precursorintelligence.com/product/juniper/fips_secure_access_4000) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Fips Secure Access 4500](https://www.precursorintelligence.com/product/juniper/fips_secure_access_4500) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Fips Secure Access 6000](https://www.precursorintelligence.com/product/juniper/fips_secure_access_6000) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Fips Secure Access 6500](https://www.precursorintelligence.com/product/juniper/fips_secure_access_6500) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Gfx3600](https://www.precursorintelligence.com/product/juniper/gfx3600) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Idp250](https://www.precursorintelligence.com/product/juniper/idp250) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Idp75](https://www.precursorintelligence.com/product/juniper/idp75) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Idp800](https://www.precursorintelligence.com/product/juniper/idp800) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Idp8200](https://www.precursorintelligence.com/product/juniper/idp8200) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Infranet Controller 4000](https://www.precursorintelligence.com/product/juniper/infranet_controller_4000) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Infranet Controller 4500](https://www.precursorintelligence.com/product/juniper/infranet_controller_4500) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Infranet Controller 6000](https://www.precursorintelligence.com/product/juniper/infranet_controller_6000) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Infranet Controller 6500](https://www.precursorintelligence.com/product/juniper/infranet_controller_6500) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Junos Space Ja1500 Appliance](https://www.precursorintelligence.com/product/juniper/junos_space_ja1500_appliance) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Junos Space Ja2500 Appliance](https://www.precursorintelligence.com/product/juniper/junos_space_ja2500_appliance) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ln1000](https://www.precursorintelligence.com/product/juniper/ln1000) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ln2600](https://www.precursorintelligence.com/product/juniper/ln2600) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [M10i](https://www.precursorintelligence.com/product/juniper/m10i) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [M120](https://www.precursorintelligence.com/product/juniper/m120) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [M320](https://www.precursorintelligence.com/product/juniper/m320) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [M7i](https://www.precursorintelligence.com/product/juniper/m7i) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Mag2600 Gateway](https://www.precursorintelligence.com/product/juniper/mag2600_gateway) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Mag4610 Gateway](https://www.precursorintelligence.com/product/juniper/mag4610_gateway) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Mag6610 Gateway](https://www.precursorintelligence.com/product/juniper/mag6610_gateway) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Mag6611 Gateway](https://www.precursorintelligence.com/product/juniper/mag6611_gateway) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [MX](https://www.precursorintelligence.com/product/juniper/mx) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Mx10](https://www.precursorintelligence.com/product/juniper/mx10) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Mx10000](https://www.precursorintelligence.com/product/juniper/mx10000) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Mx10003](https://www.precursorintelligence.com/product/juniper/mx10003) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Mx10008](https://www.precursorintelligence.com/product/juniper/mx10008) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Mx10016](https://www.precursorintelligence.com/product/juniper/mx10016) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Mx104](https://www.precursorintelligence.com/product/juniper/mx104) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Mx150](https://www.precursorintelligence.com/product/juniper/mx150) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Mx2008](https://www.precursorintelligence.com/product/juniper/mx2008) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Mx2010](https://www.precursorintelligence.com/product/juniper/mx2010) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Mx2020](https://www.precursorintelligence.com/product/juniper/mx2020) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Mx204](https://www.precursorintelligence.com/product/juniper/mx204) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Mx240](https://www.precursorintelligence.com/product/juniper/mx240) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Mx40](https://www.precursorintelligence.com/product/juniper/mx40) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Mx480](https://www.precursorintelligence.com/product/juniper/mx480) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Mx5](https://www.precursorintelligence.com/product/juniper/mx5) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Mx80](https://www.precursorintelligence.com/product/juniper/mx80) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Mx960](https://www.precursorintelligence.com/product/juniper/mx960) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Netscreen-5200](https://www.precursorintelligence.com/product/juniper/netscreen-5200) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Netscreen-5400](https://www.precursorintelligence.com/product/juniper/netscreen-5400) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Netscreen-5gt](https://www.precursorintelligence.com/product/juniper/netscreen-5gt) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): 5.0 - [Netscreen-Idp 10](https://www.precursorintelligence.com/product/juniper/netscreen-idp_10) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Netscreen-Idp 100](https://www.precursorintelligence.com/product/juniper/netscreen-idp_100) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Netscreen-Idp 1000](https://www.precursorintelligence.com/product/juniper/netscreen-idp_1000) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Netscreen-Idp 500](https://www.precursorintelligence.com/product/juniper/netscreen-idp_500) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Nfx](https://www.precursorintelligence.com/product/juniper/nfx) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Nfx150](https://www.precursorintelligence.com/product/juniper/nfx150) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Nfx250](https://www.precursorintelligence.com/product/juniper/nfx250) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Nfx350](https://www.precursorintelligence.com/product/juniper/nfx350) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Nsm3000](https://www.precursorintelligence.com/product/juniper/nsm3000) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Nsmexpress](https://www.precursorintelligence.com/product/juniper/nsmexpress) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ocx1100](https://www.precursorintelligence.com/product/juniper/ocx1100) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ptx1000](https://www.precursorintelligence.com/product/juniper/ptx1000) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ptx1000-72q](https://www.precursorintelligence.com/product/juniper/ptx1000-72q) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ptx10000](https://www.precursorintelligence.com/product/juniper/ptx10000) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ptx10001](https://www.precursorintelligence.com/product/juniper/ptx10001) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ptx10001-36mr](https://www.precursorintelligence.com/product/juniper/ptx10001-36mr) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ptx100016](https://www.precursorintelligence.com/product/juniper/ptx100016) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ptx10002](https://www.precursorintelligence.com/product/juniper/ptx10002) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ptx10002-60c](https://www.precursorintelligence.com/product/juniper/ptx10002-60c) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ptx10003](https://www.precursorintelligence.com/product/juniper/ptx10003) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ptx10003 160c](https://www.precursorintelligence.com/product/juniper/ptx10003_160c) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ptx10003 80c](https://www.precursorintelligence.com/product/juniper/ptx10003_80c) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ptx10003 81cd](https://www.precursorintelligence.com/product/juniper/ptx10003_81cd) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ptx10004](https://www.precursorintelligence.com/product/juniper/ptx10004) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ptx10008](https://www.precursorintelligence.com/product/juniper/ptx10008) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ptx10016](https://www.precursorintelligence.com/product/juniper/ptx10016) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ptx3000](https://www.precursorintelligence.com/product/juniper/ptx3000) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Ptx5000](https://www.precursorintelligence.com/product/juniper/ptx5000) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Qfx10000](https://www.precursorintelligence.com/product/juniper/qfx10000) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Qfx10002](https://www.precursorintelligence.com/product/juniper/qfx10002) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Qfx10002-32q](https://www.precursorintelligence.com/product/juniper/qfx10002-32q) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Qfx10002-60c](https://www.precursorintelligence.com/product/juniper/qfx10002-60c) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Qfx10002-72q](https://www.precursorintelligence.com/product/juniper/qfx10002-72q) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Qfx10008](https://www.precursorintelligence.com/product/juniper/qfx10008) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Qfx10016](https://www.precursorintelligence.com/product/juniper/qfx10016) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Qfx3000-G](https://www.precursorintelligence.com/product/juniper/qfx3000-g) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Qfx3000-M](https://www.precursorintelligence.com/product/juniper/qfx3000-m) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Qfx3008-I](https://www.precursorintelligence.com/product/juniper/qfx3008-i) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Qfx3100](https://www.precursorintelligence.com/product/juniper/qfx3100) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Qfx3500](https://www.precursorintelligence.com/product/juniper/qfx3500) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Qfx3600](https://www.precursorintelligence.com/product/juniper/qfx3600) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Qfx3600-I](https://www.precursorintelligence.com/product/juniper/qfx3600-i) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Qfx5100](https://www.precursorintelligence.com/product/juniper/qfx5100) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Qfx5100-96s](https://www.precursorintelligence.com/product/juniper/qfx5100-96s) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Qfx5110](https://www.precursorintelligence.com/product/juniper/qfx5110) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Qfx5120](https://www.precursorintelligence.com/product/juniper/qfx5120) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Qfx5130](https://www.precursorintelligence.com/product/juniper/qfx5130) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Qfx5200](https://www.precursorintelligence.com/product/juniper/qfx5200) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Qfx5200-32c](https://www.precursorintelligence.com/product/juniper/qfx5200-32c) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Qfx5200-48y](https://www.precursorintelligence.com/product/juniper/qfx5200-48y) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Qfx5210](https://www.precursorintelligence.com/product/juniper/qfx5210) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Qfx5210-64c](https://www.precursorintelligence.com/product/juniper/qfx5210-64c) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Qfx5220](https://www.precursorintelligence.com/product/juniper/qfx5220) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Router M10](https://www.precursorintelligence.com/product/juniper/router_m10) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Router M16](https://www.precursorintelligence.com/product/juniper/router_m16) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Router M20](https://www.precursorintelligence.com/product/juniper/router_m20) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Router M40](https://www.precursorintelligence.com/product/juniper/router_m40) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Router M5](https://www.precursorintelligence.com/product/juniper/router_m5) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Secure Access 2000](https://www.precursorintelligence.com/product/juniper/secure_access_2000) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Secure Access 2500](https://www.precursorintelligence.com/product/juniper/secure_access_2500) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Secure Access 4000](https://www.precursorintelligence.com/product/juniper/secure_access_4000) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Secure Access 4500](https://www.precursorintelligence.com/product/juniper/secure_access_4500) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Secure Access 6000](https://www.precursorintelligence.com/product/juniper/secure_access_6000) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Secure Access 6500](https://www.precursorintelligence.com/product/juniper/secure_access_6500) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Secure Access 700](https://www.precursorintelligence.com/product/juniper/secure_access_700) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Srx100](https://www.precursorintelligence.com/product/juniper/srx100) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Srx110](https://www.precursorintelligence.com/product/juniper/srx110) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Srx1400](https://www.precursorintelligence.com/product/juniper/srx1400) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Srx1500](https://www.precursorintelligence.com/product/juniper/srx1500) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Srx210](https://www.precursorintelligence.com/product/juniper/srx210) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Srx220](https://www.precursorintelligence.com/product/juniper/srx220) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Srx240](https://www.precursorintelligence.com/product/juniper/srx240) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Srx240h2](https://www.precursorintelligence.com/product/juniper/srx240h2) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Srx300](https://www.precursorintelligence.com/product/juniper/srx300) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Srx320](https://www.precursorintelligence.com/product/juniper/srx320) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Srx340](https://www.precursorintelligence.com/product/juniper/srx340) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Srx3400](https://www.precursorintelligence.com/product/juniper/srx3400) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Srx345](https://www.precursorintelligence.com/product/juniper/srx345) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Srx3600](https://www.precursorintelligence.com/product/juniper/srx3600) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Srx380](https://www.precursorintelligence.com/product/juniper/srx380) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Srx4000](https://www.precursorintelligence.com/product/juniper/srx4000) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Srx4100](https://www.precursorintelligence.com/product/juniper/srx4100) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Srx4200](https://www.precursorintelligence.com/product/juniper/srx4200) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Srx4600](https://www.precursorintelligence.com/product/juniper/srx4600) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Srx5000](https://www.precursorintelligence.com/product/juniper/srx5000) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Srx5400](https://www.precursorintelligence.com/product/juniper/srx5400) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Srx550](https://www.precursorintelligence.com/product/juniper/srx550) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Srx550 Hm](https://www.precursorintelligence.com/product/juniper/srx550_hm) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Srx550m](https://www.precursorintelligence.com/product/juniper/srx550m) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Srx5600](https://www.precursorintelligence.com/product/juniper/srx5600) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Srx5800](https://www.precursorintelligence.com/product/juniper/srx5800) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Srx650](https://www.precursorintelligence.com/product/juniper/srx650) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [T1600](https://www.precursorintelligence.com/product/juniper/t1600) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [T320](https://www.precursorintelligence.com/product/juniper/t320) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [T4000](https://www.precursorintelligence.com/product/juniper/t4000) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [T640](https://www.precursorintelligence.com/product/juniper/t640) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified - [Xre200](https://www.precursorintelligence.com/product/juniper/xre200) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified ## How do I fix CVE-2021-0289? 1. **Check whether you run it.** Compare your versions with the affected products above. Not sure what you run? Precursor Intelligence can work it out from your public website, or you can pick it from a list. 2. **Apply the vendor’s fix.** Install the update named in the vendor’s advisory. We’ve put the advisory first in the list. 3. **If you can’t patch today.** Follow any mitigation the vendor publishes, and limit who can reach the affected system from the internet until the update is in. 4. **Keep an eye on it.** Track the product and we tell you as soon as we spot this flaw on the list of exploited flaws, or a jump in its exploit likelihood. ### References - [kb.juniper.net](https://kb.juniper.net/JSA11191) (Vendor advisory) ## Questions ### What is CVE-2021-0289? CVE-2021-0289 is a medium-severity flaw in Junos from Juniper, published on 15 July 2021. An attacker has to be on the same local network without logging in, and nobody has to click anything. If it works, the attacker can take it offline. ### How serious is CVE-2021-0289? It scores 5.3 out of 10 on the CVSS severity scale, which is medium. Our risk score for CVE-2021-0289 is 21 out of 100, which is Low. Its action is "Monitor". No sign of exploitation and a low forecast. Patch it in your normal update cycle. ### Is CVE-2021-0289 being exploited? It is not on the list of flaws known to be exploited today. The latest forecast puts the chance of it being used in the next 30 days at 0.3%. That can change at any time, which is why we keep watching. ### Which versions does CVE-2021-0289 affect? For Junos from Juniper: 5.6-r1, 5.7 to before 15.1, 15.2 to before 18.4, 18.4, 18.4-r1, 18.4-r1-s1 and 62 more. The record lists 229 products in all, each with its versions, under "Who is affected" on this page. ### How do I fix CVE-2021-0289? Install the update the vendor names in its advisory, linked first under "How do I fix" on this page. If you can't patch today, follow the vendor's mitigation and limit who can reach the affected system from the internet. ## Does CVE-2021-0289 affect you? Precursor Intelligence keeps checking for you: - **Tell us what you run.** Pick your software from a list, or let us work it out from your website. - **We match it to every flaw.** Over 400,000 published flaws, checked against your list. - **Ranked by real-world risk.** Every flaw gets a 0 to 100 risk score, kept up to date, led by evidence criminals are using it. - **Told as soon as we know.** An alert by email, in the app or by webhook to your own tools. Start free (no card, nothing to install): https://www.precursorintelligence.com/register Book a demo: https://www.precursorintelligence.com/contact