---
title: "CVE-2017-5398\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-2017-5398?format=md
keywords: index, follow
---

# CVE-2017-5398

Publication date 7 March 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-2017-5398?format=md#impact-score)

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## Description

Memory safety bugs were reported in Thunderbird 45.7. 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 Firefox < 52, Firefox ESR < 45.8, Thunderbird < 52,
and Thunderbird < 45.8.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| firefox | 17.04 zesty | Fixed 52.0.1+build2-0ubuntu1 |
| 16.10 yakkety | Fixed 52.0+build2-0ubuntu0.16.10.1 |
| 16.04 LTS xenial | Fixed 52.0+build2-0ubuntu0.16.04.1 |
| 14.04 LTS trusty | Fixed 52.0+build2-0ubuntu0.14.04.1 |
| 12.04 LTS precise | Fixed 52.0+build2-0ubuntu0.12.04.1 |
| thunderbird | 17.04 zesty | Fixed 1:45.8.0+build1-0ubuntu1 |
| 16.10 yakkety | Fixed 1:45.8.0+build1-0ubuntu0.16.10.1 |
| 16.04 LTS xenial | Fixed 1:45.8.0+build1-0ubuntu0.16.04.1 |
| 14.04 LTS trusty | Fixed 1:45.8.0+build1-0ubuntu0.14.04.1 |
| 12.04 LTS precise | Fixed 1:45.8.0+build1-0ubuntu0.12.04.1 |

---

* [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-2017-5398)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2017-5398)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2017-5398)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2017-5398)

### Related Ubuntu Security Notices (USN)

+ [USN-3233-1](https://usn.ubuntu.com/USN-3233-1)
+ Thunderbird vulnerabilities
+ 24 March 2017

+ [USN-3216-1](https://usn.ubuntu.com/USN-3216-1)
+ Firefox vulnerabilities
+ 7 March 2017

### Other references

* <https://www.mozilla.org/en-US/security/advisories/mfsa2017-05/#CVE-2017-5398>
* <https://www.cve.org/CVERecord?id=CVE-2017-5398>