CVE-2022-20792 : Vulnerability Insights and Analysis
Learn about CVE-2022-20792, a vulnerability in Clam AntiVirus that allows an attacker to crash the system and execute code. Find out how to mitigate this risk.
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 overflow 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.
Understanding CVE-2022-20792
This section provides insights into the nature of CVE-2022-20792.
What is CVE-2022-20792?
CVE-2022-20792 is a vulnerability in Clam AntiVirus (ClamAV) versions 0.104.0 through 0.104.2 and LTS version 0.103.5 and prior versions that could be exploited by an authenticated local attacker to crash ClamAV and potentially execute malicious code.
The Impact of CVE-2022-20792
The impact of CVE-2022-20792 includes the ability for an attacker to disrupt ClamAV operations and potentially execute unauthorized code, posing significant risks to system security.
Technical Details of CVE-2022-20792
In this section, we delve into the technical aspects of CVE-2022-20792.
Vulnerability Description
The vulnerability arises from improper bounds checking in the regex module, leading to a heap buffer overflow write that can be triggered by a specially crafted CDB ClamAV signature database file.
Affected Systems and Versions
The affected system is Clam AntiVirus (ClamAV) with versions 0.104.0 through 0.104.2 and LTS version 0.103.5 and earlier.
Exploitation Mechanism
An attacker with local access can leverage the vulnerability to crash ClamAV at database load time and potentially gain code execution, exploiting the improper bounds checking.
Mitigation and Prevention
This section outlines the steps to mitigate the risks associated with CVE-2022-20792.
Immediate Steps to Take
Immediately update ClamAV to the latest version to patch the vulnerability and prevent potential exploitation by attackers.
Long-Term Security Practices
Implement regular security updates and patches for ClamAV to address any newly discovered vulnerabilities and enhance system security.
Patching and Updates
Stay informed about security advisories and promptly apply patches released by ClamAV to ensure the protection of your systems.