6.1
MEDIUM
CVE-2024-20506
ClamAV ClamD Symlink File Corruption Vulnerability
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.

INFO

Published Date :

Sept. 4, 2024, 10:15 p.m.

Last Modified :

Sept. 12, 2024, 5:26 p.m.

Remotely Exploitable :

No

Impact Score :

4.2

Exploitability Score :

1.8
Affected Products

The following products are affected by CVE-2024-20506 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Clamav clamav
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2024-20506.

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

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2024-20506 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2024-20506 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • Initial Analysis by [email protected]

    Sep. 12, 2024

    Action Type Old Value New Value
    Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
    Changed Reference Type https://blog.clamav.net/2024/09/clamav-141-132-107-and-010312-security.html No Types Assigned https://blog.clamav.net/2024/09/clamav-141-132-107-and-010312-security.html Release Notes
    Added CWE NIST CWE-754
    Added CPE Configuration OR *cpe:2.3:a:clamav:clamav:*:*:*:*:*:*:*:* versions up to (excluding) 0.103.12 *cpe:2.3:a:clamav:clamav:*:*:*:*:*:*:*:* versions from (including) 0.104.0 up to (excluding) 1.0.7 *cpe:2.3:a:clamav:clamav:*:*:*:*:*:*:*:* versions from (including) 1.2.0 up to (excluding) 1.3.2 *cpe:2.3:a:clamav:clamav:1.4.0:*:*:*:*:*:*:*
  • CVE Received by [email protected]

    Sep. 04, 2024

    Action Type Old Value New Value
    Added 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.
    Added Reference Cisco Systems, Inc. https://blog.clamav.net/2024/09/clamav-141-132-107-and-010312-security.html [No types assigned]
    Added CVSS V3.1 Cisco Systems, Inc. AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2024-20506 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2024-20506 weaknesses.

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability