# What is CVE-2018-0049?

> CVE-2018-0049 is a high-severity flaw (CVSS 7.5) in Junos from Juniper, published on 10 October 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 2.2%. If you run an affected version, plan in the vendor’s fix.

Canonical page: https://www.precursorintelligence.com/what-is/cve-2018-0049

## 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:** 48 out of 100 (Medium); action: Plan remediation. Kept up to date as the evidence changes.
- **Severity:** High (CVSS 7.5 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:** 2.2% (latest exploit-likelihood forecast)
- **Published:** 10 October 2018
- **Record last updated:** 12 May 2022
- **Main product:** Junos from Juniper
- **Affected products:** 58

## What is CVE-2018-0049? 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 NULL Pointer Dereference vulnerability in Juniper Networks Junos OS allows an attacker to cause the Junos OS kernel to crash. Continued receipt of this specifically crafted malicious MPLS packet will cause a sustained Denial of Service condition. This issue require it to be received on an interface configured to receive this type of traffic. Affected releases are Juniper Networks Junos OS: 12.1X46 versions above and including 12.1X46-D76 prior to 12.1X46-D81 on SRX100, SRX110, SRX210, SRX220, SRX240m, SRX550m SRX650, SRX300, SRX320, SRX340, SRX345, SRX1500, SRX4100, SRX4200, SRX4600 and vSRX; 12.3R12-S10; 12.3X48 versions above and including 12.3X48-D66 prior to 12.3X48-D75 on SRX100, SRX110, SRX210, SRX220, SRX240m, SRX550m SRX650, SRX300, SRX320, SRX340, SRX345, SRX1500, SRX4100, SRX4200, SRX4600 and vSRX; 14.1X53-D47 on EX2200/VC, EX3200, EX3300/VC, EX4200, EX4300, EX4550/VC, EX4600, EX6200, EX8200/VC (XRE), QFX3500, QFX3600, QFX5100; 14.1X53 versions above and including 14.1X53-D115 prior to 14.1X53-D130 on QFabric System; 15.1 versions above and including 15.1F6-S10; 15.1R4-S9; 15.1R6-S6; 15.1 versions above and including 15.1R7 prior to 15.1R7-S2; 15.1X49 versions above and including 15.1X49-D131 prior to 15.1X49-D150 on SRX100, SRX110, SRX210, SRX220, SRX240m, SRX550m SRX650, SRX300, SRX320, SRX340, SRX345, SRX1500, SRX4100, SRX4200, SRX4600 and vSRX; 15.1X53 versions above 15.1X53-D233 prior to 15.1X53-D235 on QFX5200/QFX5110; 15.1X53 versions up to and including 15.1X53-D471 prior to 15.1X53-D590 on NFX150, NFX250; 15.1X53-D67 on QFX10000 Series; 15.1X53-D59 on EX2300/EX3400; 16.1 versions above and including 16.1R3-S8; 16.1 versions above and including 16.1R4-S9 prior to 16.1R4-S12; 16.1 versions above and including 16.1R5-S4; 16.1 versions above and including 16.1R6-S3 prior to 16.1R6-S6; 16.1 versions above and including 16.1R7 prior to 16.1R7-S2; 16.2 versions above and including 16.2R1-S6; 16.2 versions above and including 16.2R2-S5 prior to 16.2R2-S7; 17.1R1-S7; 17.1 versions above and including 17.1R2-S7 prior to 17.1R2-S9; 17.2R1-S6; 17.2 versions above and including 17.2R2-S4 prior to 17.2R2-S6; 17.2X75 versions above and including 17.2X75-D100 prior to X17.2X75-D101, 17.2X75-D110; 17.3 versions above and including 17.3R1-S4 on All non-SRX Series and SRX100, SRX110, SRX210, SRX220, SRX240m, SRX550m SRX650, SRX300, SRX320, SRX340, SRX345, SRX1500, SRX4100, SRX4200, SRX4600 and vSRX; 17.3 versions above and including 17.3R2-S2 prior to 17.3R2-S4 on All non-SRX Series and SRX100, SRX110, SRX210, SRX220, SRX240m, SRX550m SRX650, SRX300, SRX320, SRX340, SRX345, SRX1500, SRX4100, SRX4200, SRX4600 and vSRX; 17.3R3 on All non-SRX Series and SRX100, SRX110, SRX210, SRX220, SRX240m, SRX550m SRX650, SRX300, SRX320, SRX340, SRX345, SRX1500, SRX4100, SRX4200, SRX4600 and vSRX; 17.4 versions above and including 17.4R1-S3 prior to 17.4R1-S5 on All non-SRX Series and SRX100, SRX110, SRX210, SRX220, SRX240m, SRX550m SRX650, SRX300, SRX320, SRX340, SRX345, SRX1500, SRX4100, SRX4200, SRX4600 and vSRX; 17.4R2 on All non-SRX Series and SRX100, SRX110, SRX210, SRX220, SRX240m, SRX550m SRX650, SRX300, SRX320, SRX340, SRX345, SRX1500, SRX4100, SRX4200, SRX4600 and vSRX; 18.1 versions above and including 18.1R2 prior to 18.1R2-S3, 18.1R3 on All non-SRX Series and SRX100, SRX110, SRX210, SRX220, SRX240m, SRX550m SRX650, SRX300, SRX320, SRX340, SRX345, SRX1500, SRX4100, SRX4200, SRX4600 and vSRX; 18.2 versions above and including 18.2R1 prior to 18.2R1-S2, 18.2R1-S3, 18.2R2 on All non-SRX Series and SRX100, SRX110, SRX210, SRX220, SRX240m, SRX550m SRX650, SRX300, SRX320, SRX340, SRX345, SRX1500, SRX4100, SRX4200, SRX4600 and vSRX; 18.2X75 versions above and including 18.2X75-D5 prior to 18.2X75-D20.

### What kind of flaw is it?

- CWE-476: NULL Pointer Dereference

### How an attack on it works

- Where an attacker can be: Anywhere on the internet
- How hard it is to pull off: Easy: no special conditions
- 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:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`

## Is CVE-2018-0049 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 2.2%. That can change at any time, which is why we keep watching.

Exploit likelihood over the last 7 days: 2.2%, 2.2%, 2.2%, 2.2%, 2.2%, 2.2%, 2.2%.

### Timeline

- 10 October 2018: Published
- 12 May 2022: Record last updated

### How Precursor Intelligence ranks it

CVE-2018-0049 scores **48 out of 100 (Medium)**, with the action "Plan remediation".

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-2018-0049?

The published record lists 58 products.

- [Junos](https://www.precursorintelligence.com/product/juniper/junos) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Operating system): 12.1x46-d76, 12.1x46-d77, 12.3-r12-s10, 12.3x48-d66, 12.3x48-d70, 14.1x53-d47, 15.1-f6-s10, 15.1-f6-s12, 15.1-f7, 15.1-r, 15.1-r1, 15.1-r2, 15.1-r3, 15.1-r4, 15.1-r4-s7, 15.1-r4-s8, 15.1-r4-s9, 15.1-r5, 15.1-r5-s1, 15.1-r5-s3, 15.1-r5-s5, 15.1-r5-s6, 15.1-r6, 15.1-r6-s1, 15.1-r6-s2, 15.1-r6-s3, 15.1-r6-s4, 15.1-r6-s6, 15.1-r7, 15.1-r7-s1, 15.1x49-d131, 15.1x49-d140, 15.1x53-d59, 15.1x53-d67, 15.1x53-d233, 15.1x53-d234, 15.1x53-d471, 15.1x53-d490, 15.1x53-d495, 16.1-r3-s8 and 41 more
- [Ex2200](https://www.precursorintelligence.com/product/juniper/ex2200) 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
- [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
- [Ex4300](https://www.precursorintelligence.com/product/juniper/ex4300) 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
- [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
- [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
- [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
- [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
- [Srx240h2](https://www.precursorintelligence.com/product/juniper/srx240h2) by [Juniper](https://www.precursorintelligence.com/vendors/juniper) (Hardware): version not specified
- [Srx240m](https://www.precursorintelligence.com/product/juniper/srx240m) 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

## How do I fix CVE-2018-0049?

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

- [kb.juniper.net](https://kb.juniper.net/JSA10883) (Vendor advisory)
- [kb.juniper.net](https://kb.juniper.net/KB30092) (Vendor advisory)
- [securityfocus.com](http://www.securityfocus.com/bid/105701) (Third-party advisory, Vulnerability database)
- [securitytracker.com](http://www.securitytracker.com/id/1041850) (Third-party advisory, Vulnerability database)

## Questions

### What is CVE-2018-0049?

CVE-2018-0049 is a high-severity flaw in Junos from Juniper, published on 10 October 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-2018-0049?

It scores 7.5 out of 10 on the CVSS severity scale, which is high. Our risk score for CVE-2018-0049 is 48 out of 100, which is Medium. Its action is "Plan remediation". No sign of exploitation and a low forecast. Patch it in your normal update cycle.

### Is CVE-2018-0049 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 2.2%. That can change at any time, which is why we keep watching.

### Which versions does CVE-2018-0049 affect?

For Junos from Juniper: 12.1x46-d76, 12.1x46-d77, 12.3-r12-s10, 12.3x48-d66, 12.3x48-d70, 14.1x53-d47 and 75 more. The record lists 58 products in all, each with its versions, under "Who is affected" on this page.

### How do I fix CVE-2018-0049?

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-2018-0049 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.

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