USN-5423-1: ClamAV vulnerabilities

Releases

• Ubuntu 22.04 LTS
• Ubuntu 21.10
• Ubuntu 20.04 LTS
• Ubuntu 18.04 ESM

Packages

• clamav - Anti-virus utility for Unix

Details

Michał Dardas discovered that ClamAV incorrectly handled parsing CHM files.
A remote attacker could possibly use this issue to cause ClamAV to stop
responding, resulting in a denial of service. (CVE-2022-20770)

Michał Dardas discovered that ClamAV incorrectly handled parsing TIFF
files. A remote attacker could possibly use this issue to cause ClamAV to
stop responding, resulting in a denial of service. (CVE-2022-20771)

Michał Dardas discovered that ClamAV incorrectly handled parsing HTML
files. A remote attacker could possibly use this issue to cause ClamAV to
consume resources, resulting in a denial of service. (CVE-2022-20785)

Michał Dardas discovered that ClamAV incorrectly handled loading the
signature database. A remote attacker could possibly use this issue to
cause ClamAV to crash, resulting in a denial of service, or possibly
execute arbitrary code. (CVE-2022-20792)

Alexander Patrakov and Antoine Gatineau discovered that ClamAV incorrectly
handled the scan verdict cache check. A remote attacker could possibly use
this issue to cause ClamAV to crash, resulting in a denial of service, or
possibly execute arbitrary code.(CVE-2022-20796)

Update instructions

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

Ubuntu 22.04

• clamav - 0.103.6+dfsg-0ubuntu0.22.04.1

Ubuntu 21.10

• clamav - 0.103.6+dfsg-0ubuntu0.21.10.1

Ubuntu 20.04

• clamav - 0.103.6+dfsg-0ubuntu0.20.04.1

Ubuntu 18.04

• clamav - 0.103.6+dfsg-0ubuntu0.18.04.1

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

• CVE-2022-20770
• CVE-2022-20785
• CVE-2022-20792
• CVE-2022-20771
• CVE-2022-20796

Related notices

• USN-5423-2