# What is CVE-2018-0034? > CVE-2018-0034 is a medium-severity flaw (CVSS 5.9) in Junos from Juniper, published on 11 July 2018. 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 2.1%. If you run an affected version, plan in the vendor’s fix. Canonical page: https://www.precursorintelligence.com/what-is/cve-2018-0034 ## 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:** 27 out of 100 (Low); action: Monitor. Kept up to date as the evidence changes. - **Severity:** Medium (CVSS 5.9 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:** 2.1% (latest exploit-likelihood forecast) - **Published:** 11 July 2018 - **Record last updated:** 21 June 2021 - **Main product:** Junos from Juniper - **Affected products:** 56 ## What is CVE-2018-0034? In plain terms It can be attacked from anywhere on the internet without logging in, and nobody has to click anything. If it works, the attacker can take it offline. ### The official description A Denial of Service vulnerability exists in the Juniper Networks Junos OS JDHCPD daemon which allows an attacker to core the JDHCPD daemon by sending a crafted IPv6 packet to the system. This issue is limited to systems which receives IPv6 DHCP packets on a system configured for DHCP processing using the JDHCPD daemon. This issue does not affect IPv4 DHCP packet processing. Affected releases are Juniper Networks Junos OS: 12.3 versions prior to 12.3R12-S10 on EX Series; 12.3X48 versions prior to 12.3X48-D70 on SRX Series; 14.1X53 versions prior to 14.1X53-D47 on EX2200/VC, EX3200, EX3300/VC, EX4200, EX4300, EX4550/VC, EX4600, EX6200, EX8200/VC (XRE), QFX3500, QFX3600, QFX5100; 14.1X53 versions prior to 14.1X53-D130 on QFabric; 15.1 versions prior to 15.1R4-S9, 15.1R6-S6, 15.1R7; 15.1X49 versions prior to 15.1X49-D140 on SRX Series; 15.1X53 versions prior to 15.1X53-D67 on QFX10000 Series; 15.1X53 versions prior to 15.1X53-D233 on QFX5110, QFX5200; 15.1X53 versions prior to 15.1X53-D471 on NFX 150, NFX 250; 16.1 versions prior to 16.1R3-S9, 16.1R4-S8, 16.1R5-S4, 16.1R6-S3, 16.1R7; 16.2 versions prior to 16.2R2-S5, 16.2R3; 17.1 versions prior to 17.1R1-S7, 17.1R2-S7, 17.1R3; 17.2 versions prior to 17.2R1-S6, 17.2R2-S4, 17.2R3; 17.3 versions prior to 17.3R1-S4, 17.3R2-S2, 17.3R3; 17.4 versions prior to 17.4R1-S3, 17.4R2. ### What kind of flaw is it? - CWE-20: Improper Input Validation ### How an attack on it works - Where an attacker can be: Anywhere on the internet - 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:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H` ## Is CVE-2018-0034 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 2.1%. That can change at any time, which is why we keep watching. Exploit likelihood over the last 7 days: 2.1%, 2.1%, 2.1%, 2.1%, 2.1%, 2.1%, 2.1%. ### Timeline - 11 July 2018: Published - 21 June 2021: Record last updated ### How Precursor Intelligence ranks it CVE-2018-0034 scores **27 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-2018-0034? The published record lists 56 products. - [Junos](https://www.precursorintelligence.com/product/juniper/junos) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Operating system): 12.3, 12.3-r1, 12.3-r2, 12.3-r3, 12.3-r4, 12.3-r5, 12.3-r6, 12.3-r7, 12.3-r8, 12.3-r9, 12.3-r10, 12.3-r11, 12.3-r12, 12.3x48, 12.3x48-d10, 12.3x48-d15, 12.3x48-d20, 12.3x48-d25, 12.3x48-d30, 12.3x48-d35, 12.3x48-d40, 12.3x48-d45, 12.3x48-d50, 12.3x48-d55, 12.3x48-d60, 12.3x48-d65, 14.1x53, 14.1x53-d10, 14.1x53-d15, 14.1x53-d16, 14.1x53-d20, 14.1x53-d25, 14.1x53-d26, 14.1x53-d27, 14.1x53-d30, 14.1x53-d35, 14.1x53-d40, 14.1x53-d42, 14.1x53-d43, 14.1x53-d44 and 90 more - [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 - Ex2200/vc 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 - Ex3300/vc 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 - [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 - [Ex6200](https://www.precursorintelligence.com/product/juniper/ex6200) 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 - Ex8200/vc (xre) 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 - [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 - [Qfx10002](https://www.precursorintelligence.com/product/juniper/qfx10002) 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 - [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 - [Qfx5100](https://www.precursorintelligence.com/product/juniper/qfx5100) 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 - [Qfx5200](https://www.precursorintelligence.com/product/juniper/qfx5200) 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 - [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 - [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 - [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 - [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 ## How do I fix CVE-2018-0034? 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 advisories and patch notes 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 - [apps.juniper.net](https://apps.juniper.net/feature-explorer/search.html#q=dhcp) (Vendor advisory) - [kb.juniper.net](https://kb.juniper.net/JSA10868) (Vendor advisory) - [securitytracker.com](http://www.securitytracker.com/id/1041338) (Third-party advisory, Vulnerability database) ## Questions ### What is CVE-2018-0034? CVE-2018-0034 is a medium-severity flaw in Junos from Juniper, published on 11 July 2018. It can be attacked from anywhere on the internet without logging in, and nobody has to click anything. If it works, the attacker can take it offline. ### How serious is CVE-2018-0034? It scores 5.9 out of 10 on the CVSS severity scale, which is medium. Our risk score for CVE-2018-0034 is 27 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-2018-0034 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 2.1%. That can change at any time, which is why we keep watching. ### Which versions does CVE-2018-0034 affect? For Junos from Juniper: 12.3, 12.3-r1, 12.3-r2, 12.3-r3, 12.3-r4, 12.3-r5 and 124 more. The record lists 56 products in all, each with its versions, under "Who is affected" on this page. ### How do I fix CVE-2018-0034? 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-2018-0034 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