--- title: 'USN-5423-1: ClamAV vulnerabilities | Ubuntu security notices' description: Ubuntu is an open source software operating system that runs from the desktop, to the cloud, to all your internet connected things. url: https://ubuntu.com/security/notices/USN-5423-1 --- 1. [Ubuntu Security Notices](https://ubuntu.com/security/notices) 2. USN-5423-1 --- # USN-5423-1: ClamAV vulnerabilities Publication date 17 May 2022 Overview Several security issues were fixed in ClamAV. Releases [22.04 LTS](https://ubuntu.com/security/notices?release=jammy) [21.10](https://ubuntu.com/security/notices?release=impish) [20.04 LTS](https://ubuntu.com/security/notices?release=focal) [18.04 LTS](https://ubuntu.com/security/notices?release=bionic) --- Open side navigation ## Packages * [clamav](https://ubuntu.com/security/cves?package=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](https://ubuntu.com/security/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](https://ubuntu.com/security/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](https://ubuntu.com/security/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... --- Show more ## Update instructions This update uses a new upstream release, which includes additional bug fixes. In general, a standard system update will make all the necessary changes. [Learn more about how to get the fixes.](https://ubuntu.com/security/cves/about#security) The problem can be corrected by updating your system to the following package versions: | Ubuntu Release | Package Version | | --- | --- | | 22.04 LTS jammy | [clamav](https://launchpad.net/ubuntu/+source/clamav) –  [0.103.6+dfsg-0ubuntu0.22.04.1](https://launchpad.net/ubuntu/+source/clamav/0.103.6+dfsg-0ubuntu0.22.04.1) | | | | 21.10 impish | [clamav](https://launchpad.net/ubuntu/+source/clamav) –  [0.103.6+dfsg-0ubuntu0.21.10.1](https://launchpad.net/ubuntu/+source/clamav/0.103.6+dfsg-0ubuntu0.21.10.1) | | | | 20.04 LTS focal | [clamav](https://launchpad.net/ubuntu/+source/clamav) –  [0.103.6+dfsg-0ubuntu0.20.04.1](https://launchpad.net/ubuntu/+source/clamav/0.103.6+dfsg-0ubuntu0.20.04.1) | | | | 18.04 LTS bionic | [clamav](https://launchpad.net/ubuntu/+source/clamav) –  [0.103.6+dfsg-0ubuntu0.18.04.1](https://launchpad.net/ubuntu/+source/clamav/0.103.6+dfsg-0ubuntu0.18.04.1) | | | --- ### Reduce your security exposure 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. [Get Ubuntu Pro](https://ubuntu.com/pro) ## References * [CVE-2022-20796](https://ubuntu.com/security/CVE-2022-20796) * [CVE-2022-20792](https://ubuntu.com/security/CVE-2022-20792) * [CVE-2022-20785](https://ubuntu.com/security/CVE-2022-20785) * [CVE-2022-20771](https://ubuntu.com/security/CVE-2022-20771) * [CVE-2022-20770](https://ubuntu.com/security/CVE-2022-20770) ## Related notices * [USN-5423-2](https://ubuntu.com/security/notices/USN-5423-2)