CVE-2021-45340 : What You Need to Know

In Libsixel prior to and including v1.10.3, a NULL pointer dereference in the stb_image.h component of libsixel allows attackers to cause a denial of service (DOS) via a crafted PICT file.

Understanding CVE-2021-45340

In this CVE, a vulnerability in Libsixel up to version 1.10.3 exposes systems to denial of service attacks through a specific file type.

What is CVE-2021-45340?

The vulnerability in the stb_image.h component of Libsixel allows malicious actors to trigger a denial of service by exploiting a crafted PICT file.

The Impact of CVE-2021-45340

This vulnerability can lead to a denial of service (DOS) condition, disrupting system availability and potentially causing operational issues.

Technical Details of CVE-2021-45340

In-depth information about the technical aspects of the CVE.

Vulnerability Description

A NULL pointer dereference in the stb_image.h component of Libsixel prior to and including v1.10.3 can be abused by attackers to execute a denial of service attack.

Affected Systems and Versions

Affected systems running Libsixel up to and including version 1.10.3

Exploitation Mechanism

Attackers can exploit the vulnerability by using a specially crafted PICT file to trigger the NULL pointer dereference, leading to a denial of service situation.

Mitigation and Prevention

Ways to address and prevent the CVE from being exploited.

Immediate Steps to Take

Update Libsixel to version 1.10.4 or later to mitigate the vulnerability
Avoid opening untrusted PICT files

Long-Term Security Practices

Regularly monitor for security advisories and updates from Libsixel
Implement proper input validation checks in file processing components

Patching and Updates

Apply patches and updates released by Libsixel promptly to ensure the latest security fixes are in place.