USN-5638-3: Expat vulnerability

Releases

• Ubuntu 22.10
• Ubuntu 22.04 LTS
• Ubuntu 20.04 LTS
• Ubuntu 18.04 ESM
• Ubuntu 16.04 ESM

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.

Update instructions

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

Ubuntu 22.10

• expat - 2.4.8-2ubuntu0.22.10.1
• libexpat1 - 2.4.8-2ubuntu0.22.10.1

Ubuntu 22.04

• expat - 2.4.7-1ubuntu0.2
• libexpat1 - 2.4.7-1ubuntu0.2

Ubuntu 20.04

• expat - 2.2.9-1ubuntu0.6
• libexpat1 - 2.2.9-1ubuntu0.6

Ubuntu 18.04

• expat - 2.2.5-3ubuntu0.9
• libexpat1 - 2.2.5-3ubuntu0.9

Ubuntu 16.04

• expat - 2.1.0-7ubuntu0.16.04.5+esm7
  Available with Ubuntu Pro
• libexpat1 - 2.1.0-7ubuntu0.16.04.5+esm7
  Available with Ubuntu Pro
• lib64expat1 - 2.1.0-7ubuntu0.16.04.5+esm7
  Available with Ubuntu Pro

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

References

• CVE-2022-43680

Related notices

• USN-5638-2
• USN-5638-4