CVE-2020-27818 : Security Advisory and Response

A flaw in the check_chunk_name() function of pngcheck-2.4.0 could lead to a denial of service attack, posing a low risk to application availability.

Understanding CVE-2020-27818

This CVE involves a vulnerability in pngcheck-2.4.0 that could be exploited by an attacker to cause a temporary denial of service.

What is CVE-2020-27818?

The vulnerability lies in the check_chunk_name() function of pngcheck-2.4.0, allowing an attacker to trigger a denial of service by passing a malicious file for processing.

The Impact of CVE-2020-27818

The exploitation of this vulnerability could result in a temporary denial of service, posing a low risk to the availability of the affected application.

Technical Details of CVE-2020-27818

This section provides more technical insights into the CVE.

Vulnerability Description

The flaw in the check_chunk_name() function of pngcheck-2.4.0 enables attackers to cause a temporary denial of service.

Affected Systems and Versions

Product: pngcheck
Version: pngcheck-2.4.0

Exploitation Mechanism

Attackers can exploit this vulnerability by passing a specially crafted malicious file to pngcheck for processing.

Mitigation and Prevention

Protecting systems from CVE-2020-27818 requires specific actions to mitigate the risk.

Immediate Steps to Take

Apply the security update provided by the vendor promptly.
Avoid processing untrusted or unknown PNG files with pngcheck.

Long-Term Security Practices

Regularly update and patch software to address known vulnerabilities.
Implement file input validation mechanisms to prevent the processing of malicious files.

Patching and Updates

Ensure that the latest security patches and updates for pngcheck are installed to address CVE-2020-27818.