CVE-2024-20506 ClamAV Privilege Handling Escalation Vulnerability
A local authenticated attacker can corrupt critical system files by exploiting a symlink vulnerability in ClamAV's log handling, leading to privilege escalation.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-20506?
CVE-2024-20506 is a medium-severity vulnerability in Clamav Clamav, published on 4 Sep 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability in the ClamD service module of Clam AntiVirus (ClamAV) versions 1.4.0, 1.3.2 and prior versions, all 1.2.x versions, 1.0.6 and prior versions, all 0.105.x versions, all 0.104.x versions, and 0.103.11 and all prior versions could allow an authenticated, local attacker to corrupt critical system files. The vulnerability is due to allowing the ClamD process to write to its log file while privileged without checking if the logfile has been replaced with a symbolic link. An attacker could exploit this vulnerability if they replace the ClamD log file with a symlink to a critical system file and then find a way to restart the ClamD process. An exploit could allow the attacker to corrupt a critical system file by appending ClamD log messages after restart.
Weakness: CWE-754
Which versions are affected by CVE-2024-20506?
It affects 1 product.
Products include Clamav Clamav.
How do I fix CVE-2024-20506?
Upgrade to a fixed version.
Is CVE-2024-20506 being exploited?
There is no known exploitation of CVE-2024-20506 in the wild and no public exploit code.
Other vulnerabilities in Clamav Clamav
Sources
Also known as AZL-48624, AZL-48665, DEBIAN-CVE-2024-20506, GHSA-h5fr-q576-q7rv, UBUNTU-CVE-2024-20506.