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

USN-5638-2: Expat vulnerabilities

Publication date

17 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 18.04 LTS, Ubuntu 20.04 LTS and
Ubuntu 22.04 LTS.

It was discovered that Expat incorrectly handled memory in out-of-memory
situations. An attacker could possibly use this issue to cause a crash,
resulting in a denial of service, or possibly execute arbitrary code.
This issue only affected Ubuntu 18.04 LTS. (CVE-2022-43680)

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 18.04 LTS, Ubuntu 20.04 LTS and
Ubuntu 22.04 LTS.

It was discovered that Expat incorrectly handled memory in out-of-memory
situations. An attacker could possibly use this issue to cause a crash,
resulting in a denial of service, or possibly execute arbitrary code.
This issue only affected Ubuntu 18.04 LTS. (CVE-2022-43680)

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
22.04 jammy expat –  2.4.7-1ubuntu0.1
libexpat1 –  2.4.7-1ubuntu0.1
20.04 focal expat –  2.2.9-1ubuntu0.5
libexpat1 –  2.2.9-1ubuntu0.5
18.04 bionic expat –  2.2.5-3ubuntu0.8
libexpat1 –  2.2.5-3ubuntu0.8

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References

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