==========================================================================
Ubuntu Security Notice USN-6569-1
January 08, 2024

libclamunrar vulnerabilities
==========================================================================

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

Summary:

Several security issues were fixed in libclamunrar.

Software Description:
- libclamunrar: anti-virus utility for Unix - unrar support

Details:

it was discovered that libclamunrar incorrectly handled directories when
extracting RAR archives. A remote attacker could possibly use this issue to
overwrite arbitrary files and execute arbitrary code. This issue only
affected Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, and Ubuntu 23.04.
(CVE-2022-30333)

It was discovered that libclamunrar incorrectly validated certain
structures when extracting RAR archives. A remote attacker could possibly
use this issue to execute arbitrary code. (CVE-2023-40477)

Update instructions:

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

Ubuntu 23.10:
   libclamunrar11                  1.0.4-0ubuntu0.23.10.1

Ubuntu 23.04:
   libclamunrar9                   0.103.11-0ubuntu0.23.04.1

Ubuntu 22.04 LTS:
   libclamunrar9                   0.103.11-0ubuntu0.22.04.1

Ubuntu 20.04 LTS:
   libclamunrar9                   0.103.11-0ubuntu0.20.04.1

This update uses a new upstream release, which includes additional bug
fixes. In general, a standard system update will make all the necessary
changes.

References:
   https://ubuntu.com/security/notices/USN-6569-1
   CVE-2022-30333, CVE-2023-40477

Package Information:
   https://launchpad.net/ubuntu/+source/libclamunrar/1.0.4-0ubuntu0.23.10.1
   https://launchpad.net/ubuntu/+source/libclamunrar/0.103.11-0ubuntu0.23.04.1
   https://launchpad.net/ubuntu/+source/libclamunrar/0.103.11-0ubuntu0.22.04.1
   https://launchpad.net/ubuntu/+source/libclamunrar/0.103.11-0ubuntu0.20.04.1