#VU96824 UNIX symbolic link following in ClamAV - CVE-2024-20506

Vulnerability identifier: #VU96824

Vulnerability risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2024-20506

CWE-ID: CWE-61

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
ClamAV
Client/Desktop applications / Antivirus software/Personal firewalls

Vendor: ClamAV

Description

The vulnerability allows a local user to corrupt system files.

The vulnerability exists due to a symlink following issue within the logging module. A local user with existing access to the 'clamd' or 'freshclam' services can corrupt system files and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

ClamAV: 0.103 - 0.103.11, 0.104.0 - 0.104.4, 0.105.0 - 0.105.2, 1.0.0 - 1.0.6, 1.1.0, 1.1.1, 1.1.2, 1.1.3, 1.2.0 - 1.2.3, 1.3.0 - 1.3.1, 1.4.0

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External links
https://blog.clamav.net/2024/09/clamav-141-132-107-and-010312-security.html
https://github.com/Cisco-Talos/clamav-devel/releases/tag/clamav-1.3.2
https://github.com/Cisco-Talos/clamav-devel/releases/tag/clamav-1.0.7
https://github.com/Cisco-Talos/clamav-devel/releases/tag/clamav-0.103.12
https://github.com/Cisco-Talos/clamav-devel/releases/tag/clamav-1.4.1

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.