CVE-2022-20803 : Security Advisory and Response
Learn about CVE-2022-20803 affecting ClamAV versions 0.104.0 to 0.104.2. Explore impact, mitigation strategies, and prevention methods for this double-free vulnerability.
A vulnerability has been identified in the OLE2 file parser of Clam AntiVirus (ClamAV) versions 0.104.0 through 0.104.2. An unauthenticated remote attacker could exploit this vulnerability to cause a denial of service on the affected device by submitting a crafted OLE2 file. Here's what you need to know about CVE-2022-20803.
Understanding CVE-2022-20803
This section provides insights into the nature of the vulnerability and its impact on affected systems.
What is CVE-2022-20803?
The vulnerability in the OLE2 file parser of ClamAV versions 0.104.0 through 0.104.2 allows attackers to cause a denial of service by exploiting an incorrect use of the realloc function leading to a double-free possibility.
The Impact of CVE-2022-20803
Exploiting this vulnerability could result in crashing the ClamAV scanning process, causing a denial of service condition on the affected device.
Technical Details of CVE-2022-20803
This section delves into the specific technical aspects of the vulnerability.
Vulnerability Description
The vulnerability arises from the incorrect use of the realloc function, potentially causing a double-free scenario that can be exploited by attackers.
Affected Systems and Versions
The vulnerability affects ClamAV versions 0.104.0 to 0.104.2, specifically impacting devices running these versions.
Exploitation Mechanism
By submitting a crafted OLE2 file to be scanned by ClamAV on an affected device, an attacker could exploit this vulnerability and cause a denial of service.
Mitigation and Prevention
To secure your systems against CVE-2022-20803, consider the following mitigation strategies.
Immediate Steps to Take
Organizations are advised to apply security updates promptly to address the vulnerability and prevent exploitation.
Long-Term Security Practices
Implementing secure coding practices and conducting regular security assessments can help prevent similar vulnerabilities in the future.
Patching and Updates
Regularly updating ClamAV to the latest stable version is crucial to ensure that known vulnerabilities are patched and system security is maintained.