CVE-2021-1404 : Exploit Details and Defense Strategies

A vulnerability in the PDF parsing module in Clam AntiVirus (ClamAV) Software versions 0.103.0 and 0.103.1 could allow an unauthenticated, remote attacker to cause a denial of service condition on an affected device due to improper buffer size tracking.

Understanding CVE-2021-1404

This CVE involves a denial of service vulnerability in Clam AntiVirus (ClamAV) affecting versions 0.103.0 and 0.103.1.

What is CVE-2021-1404?

The vulnerability in the PDF parsing module of Clam AntiVirus (ClamAV) could be exploited by sending a crafted PDF file to crash the scanning process, resulting in denial of service.

The Impact of CVE-2021-1404

The impact of this vulnerability is rated as high with a CVSS base score of 7.5 due to the potential for a remote attacker to cause a denial of service condition.

Technical Details of CVE-2021-1404

This section provides technical details about the vulnerability.

Vulnerability Description

The vulnerability is caused by improper buffer size tracking in the PDF parsing module, leading to a heap buffer over-read.

Affected Systems and Versions

Clam AntiVirus (ClamAV) versions 0.103.0 and 0.103.1 are affected by this vulnerability.

Exploitation Mechanism

An unauthenticated, remote attacker could exploit this vulnerability by sending a specially crafted PDF file to crash the ClamAV scanning process.

Mitigation and Prevention

To mitigate the risk associated with CVE-2021-1404, certain steps can be taken.

Immediate Steps to Take

Update ClamAV software to the latest patched versions to prevent exploitation of this vulnerability.

Long-Term Security Practices

Adopting a proactive approach to security by regularly updating software and implementing security best practices can help prevent similar vulnerabilities in the future.

Patching and Updates

Stay informed about security patches and updates released by vendors to promptly address known vulnerabilities.