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Ubuntu Security Notice USN-5638-3

Ubuntu Security Notice 5638-3 - 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. This update also fixes a minor regression introduced in Ubuntu 18.04 LTS.

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==========================================================================
Ubuntu Security Notice USN-5638-3
November 23, 2022

expat vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

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

Summary:

Expat could be made to crash or execute arbitrary code.

Software Description:

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

Ubuntu 20.04 LTS:
expat 2.2.9-1ubuntu0.6
libexpat1 2.2.9-1ubuntu0.6

Ubuntu 18.04 LTS:
expat 2.2.5-3ubuntu0.9
libexpat1 2.2.5-3ubuntu0.9

Ubuntu 16.04 ESM:
expat 2.1.0-7ubuntu0.16.04.5+esm7
lib64expat1 2.1.0-7ubuntu0.16.04.5+esm7
libexpat1 2.1.0-7ubuntu0.16.04.5+esm7

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

References:
https://ubuntu.com/security/notices/USN-5638-3
https://ubuntu.com/security/notices/USN-5638-1
CVE-2022-43680

Package Information:
https://launchpad.net/ubuntu/+source/expat/2.4.8-2ubuntu0.22.10.1
https://launchpad.net/ubuntu/+source/expat/2.4.7-1ubuntu0.2
https://launchpad.net/ubuntu/+source/expat/2.2.9-1ubuntu0.6
https://launchpad.net/ubuntu/+source/expat/2.2.5-3ubuntu0.9

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