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CVE-2024-20506

Publication date 4 September 2024

Last updated 17 September 2024

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

6.1 · Medium

Score breakdown

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.

Status

Package Ubuntu Release Status
clamav 24.04 LTS noble
Fixed 1.0.7+dfsg-0ubuntu0.24.04.1
22.04 LTS jammy
Fixed 0.103.12+dfsg-0ubuntu0.22.04.1
20.04 LTS focal
Fixed 0.103.12+dfsg-0ubuntu0.20.04.1
18.04 LTS bionic
16.04 LTS xenial
14.04 LTS trusty
Needs evaluation

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Severity score breakdown

Parameter Value
Base score 6.1 · Medium
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact Low
Availability impact High
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H

References

Related Ubuntu Security Notices (USN)

    • USN-7011-1
    • ClamAV vulnerabilities
    • 16 September 2024
    • USN-7011-2
    • ClamAV vulnerabilities
    • 17 September 2024

Other references