---
title: "CVE-2018-5118\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-2018-5118?format=md
keywords: index, follow
---

# CVE-2018-5118

Publication date 23 January 2018

Last updated 25 August 2025

---

Ubuntu priority

**Medium**

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

## Cvss 3 Severity Score

**5.3 · Medium**

[Score breakdown](https://ubuntu.com/security/CVE-2018-5118?format=md#impact-score)

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## Description

The screenshot images displayed in the Activity Stream page displayed when
a new tab is opened is created from the meta tags of websites. An issue was
discovered where the page could attempt to create these images through
"file:" URLs from the local file system. This loading is blocked by the
sandbox but could expose local data if combined with another attack that
escapes sandbox protections. This vulnerability affects Firefox < 58.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| firefox | 18.04 LTS bionic | Fixed 59.0.1+build1-0ubuntu1 |
| 17.10 artful | Fixed 58.0+build6-0ubuntu0.17.10.1 |
| 16.04 LTS xenial | Fixed 58.0+build6-0ubuntu0.16.04.1 |
| 14.04 LTS trusty | Fixed 58.0+build6-0ubuntu0.14.04.1 |

---

* [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**

5.3 · Medium

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 5.3 · Medium |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-5118)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2018-5118)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2018-5118)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2018-5118)

### Related Ubuntu Security Notices (USN)

+ [USN-3544-1](https://usn.ubuntu.com/USN-3544-1)
+ Firefox vulnerabilities
+ 24 January 2018

### Other references

* <https://www.mozilla.org/en-US/security/advisories/mfsa2018-02/>
* <https://www.cve.org/CVERecord?id=CVE-2018-5118>