CVE-2020-3123 : Security Advisory and Response

A vulnerability in the Data-Loss-Prevention (DLP) module in Clam AntiVirus (ClamAV) Software versions 0.102.1 and 0.102.0 could allow an unauthenticated, remote attacker to cause a denial of service condition on an affected device.

Understanding CVE-2020-3123

This CVE involves a vulnerability in ClamAV software that could be exploited by a remote attacker to trigger a denial of service attack.

What is CVE-2020-3123?

The vulnerability in ClamAV software versions 0.102.1 and 0.102.0 allows an attacker to crash the scanning process by sending a crafted email file, leading to a denial of service.

The Impact of CVE-2020-3123

The vulnerability has a CVSS base score of 7.5 (High severity) with a high impact on availability. It could result in a denial of service condition on affected devices.

Technical Details of CVE-2020-3123

This section provides more technical insights into the vulnerability.

Vulnerability Description

The vulnerability is an out-of-bounds read affecting users who have enabled the optional DLP feature in ClamAV software.

Affected Systems and Versions

Product: ClamAV
Vendor: Cisco
Versions: 0.102.1, 0.102.0

Exploitation Mechanism

An attacker can exploit this vulnerability by sending a specially crafted email file to the target device, causing the ClamAV scanning process to crash.

Mitigation and Prevention

Protecting systems from CVE-2020-3123 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply the security patch released by ClamAV to address the vulnerability.
Disable the DLP feature in ClamAV if not essential for operations.

Long-Term Security Practices

Regularly update and patch ClamAV software to prevent known vulnerabilities.
Implement email filtering and security measures to detect and block malicious email attachments.

Patching and Updates

Ensure timely installation of security patches and updates for ClamAV software to mitigate the risk of exploitation.