ClamAV Privilege Handling Escalation Vulnerability
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · Low · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Cisco | ClamAV | 1.4.0; 1.3.2; 1.0.6; 1.0.5; 1.0.4; 1.0.3; 1.0.2; 1.0.1; 1.0.0; 1.2.x; 0.105.x; 0.104.x; 0.103.11; 0.103.10; 0.103.9; 0.103.8; 0.103.7; 0.103.6; 0.103.5; 0.103.4; 0.103.3; 0.103.2; 0.103.1; 0.103.0 | — | No fix listed | CNA |
- ClamAV VendorCisco Affected 1.4.0; 1.3.2; 1.0.6; 1.0.5; 1.0.4; 1.0.3; 1.0.2; 1.0.1; 1.0.0; 1.2.x; 0.105.x; 0.104.x; 0.103.11; 0.103.10; 0.103.9; 0.103.8; 0.103.7; 0.103.6; 0.103.5; 0.103.4; 0.103.3; 0.103.2; 0.103.1; 0.103.0 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2024-20506
- 2026-10-03 Alias added: GHSA-h5fr-q576-q7rv
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Sources
- CVE-2024-20506 · CVE Program
- CVE-2024-20506 · NVD
- FIRST EPSS
- GHSA-h5fr-q576-q7rv · GitHub Advisory Database · CC BY 4.0
- CVE-2024-20506 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences