Improper Check for Unusual or Exceptional Conditions Affecting clamav-update package, versions <0:0.103.12-1.amzn2.0.1


Severity

Recommended
0.0
medium
0
10

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.04% (11th percentile)

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  • Snyk IDSNYK-AMZN2-CLAMAVUPDATE-8161145
  • published3 Oct 2024
  • disclosed4 Sept 2024

Introduced: 4 Sep 2024

CVE-2024-20506  (opens in a new tab)
CWE-754  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2 clamav-update to version 0:0.103.12-1.amzn2.0.1 or higher.
This issue was patched in ALAS2-2024-2644.

NVD Description

Note: Versions mentioned in the description apply only to the upstream clamav-update package and not the clamav-update package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2 relevant fixed versions and status.

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.

CVSS Scores

version 3.1