---
title: "CVE-2017-5429\n    | Ubuntu"
description: Ubuntu is an open source software operating system that runs from the
  desktop, to the cloud, to all your internet connected things.
url: https://ubuntu.com/security/CVE-2017-5429?format=md
keywords: index, follow
---

# CVE-2017-5429

Publication date 20 April 2017

Last updated 25 August 2025

---

Ubuntu priority

**Medium**

[Why this priority?](https://ubuntu.com/security/cves/about#priority )

## Cvss 3 Severity Score

**9.8 · Critical**

[Score breakdown](https://ubuntu.com/security/CVE-2017-5429?format=md#impact-score)

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## Description

Memory safety bugs were reported in Firefox 52, Firefox ESR 45.8, Firefox
ESR 52, and Thunderbird 52. Some of these bugs showed evidence of memory
corruption and we presume that with enough effort that some of these could
be exploited to run arbitrary code. This vulnerability affects Thunderbird
< 52.1, Firefox ESR < 45.9, Firefox ESR < 52.1, and Firefox < 53.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| firefox | 17.04 zesty | Fixed 53.0+build6-0ubuntu0.17.04.1 |
| 16.10 yakkety | Fixed 53.0+build6-0ubuntu0.16.10.1 |
| 16.04 LTS xenial | Fixed 53.0+build6-0ubuntu0.16.04.1 |
| 14.04 LTS trusty | Fixed 53.0+build6-0ubuntu0.14.04.1 |
| 12.04 LTS precise | Ignored |
| thunderbird | 17.04 zesty | Fixed 1:52.1.1+build1-0ubuntu0.17.04.1 |
| 16.10 yakkety | Fixed 1:52.1.1+build1-0ubuntu0.16.10.1 |
| 16.04 LTS xenial | Fixed 1:52.1.1+build1-0ubuntu0.16.04.1 |
| 14.04 LTS trusty | Fixed 1:52.1.1+build1-0ubuntu0.14.04.1 |
| 12.04 LTS precise | Ignored end of life |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

9.8 · Critical

* Base metrics

  | Parameter | Value |
  | --- | --- |
  | Attack vector | Network |
  | Attack complexity | Low |
  | Privileges required | None |
  | User interaction | None |
  | Scope | Unchanged |
  | Confidentiality impact | High |
  | Integrity impact | High |
  | Availability impact | High |
* Scores

  | Parameter | Value |
  | --- | --- |
  | Base score | 9.8 · Critical |
  | Exploitability score | - |
  | Impact score | - |

**Vector:** CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-5429)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2017-5429)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2017-5429)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2017-5429)

### Related Ubuntu Security Notices (USN)

+ [USN-3278-1](https://usn.ubuntu.com/USN-3278-1)
+ Thunderbird vulnerabilities
+ 16 May 2017

+ [USN-3260-1](https://usn.ubuntu.com/USN-3260-1)
+ Firefox vulnerabilities
+ 21 April 2017

### Other references

* <https://www.mozilla.org/en-US/security/advisories/mfsa2017-10/#CVE-2017-5429>
* <https://www.cve.org/CVERecord?id=CVE-2017-5429>