[USN-6543-1] GNU Tar vulnerability

[Alex Murray]

==========================================================================
Ubuntu Security Notice USN-6543-1
December 11, 2023

tar vulnerability
==========================================================================

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

- Ubuntu 23.10
- Ubuntu 23.04
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS (Available with Ubuntu Pro)
- Ubuntu 16.04 LTS (Available with Ubuntu Pro)
- Ubuntu 14.04 LTS (Available with Ubuntu Pro)

Summary:

tar could be made to crash if it opened a specially crafted file.

Software Description:
- tar: GNU version of the tar archiving utility

Details:

It was discovered that tar incorrectly handled extended attributes in PAX
archives. An attacker could use this issue to cause tar to crash, resulting in a
denial of service.

Update instructions:

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

Ubuntu 23.10:
  tar                             1.34+dfsg-1.2ubuntu1.1

Ubuntu 23.04:
  tar                             1.34+dfsg-1.2ubuntu0.2

Ubuntu 22.04 LTS:
  tar                             1.34+dfsg-1ubuntu0.1.22.04.2

Ubuntu 20.04 LTS:
  tar                             1.30+dfsg-7ubuntu0.20.04.4

Ubuntu 18.04 LTS (Available with Ubuntu Pro):
  tar                             1.29b-2ubuntu0.4+esm1

Ubuntu 16.04 LTS (Available with Ubuntu Pro):
  tar                             1.28-2.1ubuntu0.2+esm3

Ubuntu 14.04 LTS (Available with Ubuntu Pro):
  tar                             1.27.1-1ubuntu0.1+esm4

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

References:
  https://ubuntu.com/security/notices/USN-6543-1
  CVE-2023-39804

Package Information:
  https://launchpad.net/ubuntu/+source/tar/1.34+dfsg-1.2ubuntu1.1
  https://launchpad.net/ubuntu/+source/tar/1.34+dfsg-1.2ubuntu0.2
  https://launchpad.net/ubuntu/+source/tar/1.34+dfsg-1ubuntu0.1.22.04.2
  https://launchpad.net/ubuntu/+source/tar/1.30+dfsg-7ubuntu0.20.04.4

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