1. Ubuntu Security Notices
  2. USN-5638-3

USN-5638-3: Expat vulnerability

Publication date

23 November 2022

Overview

Expat could be made to crash or execute arbitrary code.

Releases

Packages

  • expat - XML parsing C library

Details

USN-5638-1 fixed a vulnerability in Expat. This update provides
the corresponding updates for Ubuntu 16.04 ESM, Ubuntu 18.04 LTS,
Ubuntu 20.04 LTS, Ubuntu 22.04 LTS and Ubuntu 22.10. (CVE-2022-43680)
This update also fixes a minor regression introduced in
Ubuntu 18.04 LTS.

We apologize for the inconvenience.

Original advisory details:

Rhodri James discovered that Expat incorrectly handled memory when
processing certain malformed XML files. An attacker could possibly
use this issue to cause a crash or execute arbitrary code.

USN-5638-1 fixed a vulnerability in Expat. This update provides
the corresponding updates for Ubuntu 16.04 ESM, Ubuntu 18.04 LTS,
Ubuntu 20.04 LTS, Ubuntu 22.04 LTS and Ubuntu 22.10. (CVE-2022-43680)
This update also fixes a minor regression introduced in
Ubuntu 18.04 LTS.

We apologize for the inconvenience.

Original advisory details:

Rhodri James discovered that Expat incorrectly handled memory when
processing certain malformed XML files. An attacker could possibly
use this issue to cause a crash or execute arbitrary code.

Update instructions

In general, a standard system update will make all the necessary changes.

Learn more about how to get the fixes.

The problem can be corrected by updating your system to the following package versions:

Ubuntu Release Package Version
22.10 kinetic expat –  2.4.8-2ubuntu0.22.10.1
libexpat1 –  2.4.8-2ubuntu0.22.10.1
22.04 jammy expat –  2.4.7-1ubuntu0.2
libexpat1 –  2.4.7-1ubuntu0.2
20.04 focal expat –  2.2.9-1ubuntu0.6
libexpat1 –  2.2.9-1ubuntu0.6
18.04 bionic expat –  2.2.5-3ubuntu0.9
libexpat1 –  2.2.5-3ubuntu0.9
16.04 xenial expat –  2.1.0-7ubuntu0.16.04.5+esm7  
libexpat1 –  2.1.0-7ubuntu0.16.04.5+esm7  
lib64expat1 –  2.1.0-7ubuntu0.16.04.5+esm7  

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References

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