CVE-2022-20792: cisco clam antivirus (clamav) Out-of-bounds Read

Vulnerability summary

CVE-2022-20792 is a high (CVSS 7.8) Out-of-bounds Read vulnerability in cisco clam antivirus (clamav). EPSS estimates a 0.57% chance of exploitation in the next 30 days, higher than 46.2% of scored vulnerabilities.

Timeline

1. 10-08-2022
   PublishedVulnerability first disclosed.
2. 01-11-2024
   Last modifiedVulnerability information updated.

Description

A vulnerability in the regex module used by the signature database load module of Clam AntiVirus (ClamAV) versions 0.104.0 through 0.104.2 and LTS version 0.103.5 and prior versions could allow an authenticated, local attacker to crash ClamAV at database load time, and possibly gain code execution. The vulnerability is due to improper bounds checking that may result in a multi-byte heap buffer overwflow write. An attacker could exploit this vulnerability by placing a crafted CDB ClamAV signature database file in the ClamAV database directory. An exploit could allow the attacker to run code as the clamav user.

• CWE-125Out-of-bounds ReadThe product reads data past the end, or before the beginning, of the intended buffer.
• CWE-787Out-of-bounds WriteThe product writes data past the end, or before the beginning, of the intended buffer.