---
title: "CVE-2018-20760\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-2018-20760?format=md
keywords: index, follow
---

# CVE-2018-20760

Publication date 6 February 2019

Last updated 25 August 2025

---

Ubuntu priority

**Medium**

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

## Cvss 3 Severity Score

**7.8 · High**

[Score breakdown](https://ubuntu.com/security/CVE-2018-20760?format=md#impact-score)

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## Description

In GPAC 0.7.1 and earlier, gf\_text\_get\_utf8\_line in
media\_tools/text\_import.c in libgpac\_static.a allows an out-of-bounds write
because a certain -1 return value is mishandled.

### From the Ubuntu Security Team

It was discovered that the GPAC MP4Box utility incorrectly handled certain
memory operations. If an user or automated system were tricked into opening a
specially crafted MP4 file, a remote attacker could use this issue to cause
MP4Box to crash, resulting in a denial of service, or possibly execute
arbitrary code.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| gpac | 22.04 LTS jammy | Not affected |
| 21.10 impish | Not affected |
| 21.04 hirsute | Not affected |
| 20.10 groovy | Not affected |
| 20.04 LTS focal | Not affected |
| 19.10 eoan | Ignored end of life |
| 19.04 disco | Ignored end of life |
| 18.10 cosmic | Fixed 0.5.2-426-gc5ad4e4+dfsg5-4ubuntu0.1 |
| 18.04 LTS bionic | Fixed 0.5.2-426-gc5ad4e4+dfsg5-3ubuntu0.1 |
| 16.04 LTS xenial | Fixed 0.5.2-426-gc5ad4e4+dfsg5-1ubuntu0.1 |
| 14.04 LTS trusty | Fixed 0.5.0+svn4288~dfsg1-4ubuntu1+esm1  Ubuntu Pro |

---

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

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## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

7.8 · High

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 7.8 · High |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20760)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2018-20760)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2018-20760)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2018-20760)

### Related Ubuntu Security Notices (USN)

+ [USN-3926-1](https://usn.ubuntu.com/USN-3926-1)
+ GPAC vulnerabilities
+ 29 March 2019

### Other references

* <https://github.com/gpac/gpac/commit/4c1360818fc8948e9307059fba4dc47ba8ad255d>
* <https://github.com/gpac/gpac/issues/1177>
* <https://www.cve.org/CVERecord?id=CVE-2018-20760>