USN-6569-1: libclamunrar vulnerabilities

8 January 2024

Several security issues were fixed in libclamunrar.

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Releases

Packages

  • 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)

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Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

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Update instructions

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

Ubuntu 23.10
Ubuntu 23.04
Ubuntu 22.04
Ubuntu 20.04

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

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Further reading