[USN-6569-1] libclamunrar vulnerabilities

Marc Deslauriers marc.deslauriers at canonical.com
Mon Jan 8 19:45:56 UTC 2024

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


Several security issues were fixed in libclamunrar.

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


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.

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

   CVE-2022-30333, CVE-2023-40477

Package Information:

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