CVE-2022-27938 : Security Advisory and Response

A vulnerability has been found in stb_image.h version 2.19, commonly used in libsixel and other products, leading to a reachable assertion in stbi__create_png_image_raw.

Understanding CVE-2022-27938

This CVE identifies a specific vulnerability in the stb_image.h library version 2.19, affecting various software products such as libsixel.

What is CVE-2022-27938?

The vulnerability in stb_image.h version 2.19 allows attackers to trigger a reachable assertion in the stbi__create_png_image_raw function, potentially leading to security compromises.

The Impact of CVE-2022-27938

Exploitation of this vulnerability could result in unauthorized access, data leaks, or even remote code execution, posing a significant risk to affected systems.

Technical Details of CVE-2022-27938

Here are the technical details related to CVE-2022-27938:

Vulnerability Description

The vulnerability allows for a reachable assertion in the stbi__create_png_image_raw function within stb_image.h version 2.19, impacting various software products.

Affected Systems and Versions

Systems using stb_image.h version 2.19, including products like libsixel, are vulnerable to exploitation of this specific issue.

Exploitation Mechanism

Attackers can exploit the vulnerability by triggering a specially crafted input that leads to the assertion in the stbi__create_png_image_raw function.

Mitigation and Prevention

To protect systems from CVE-2022-27938, consider the following mitigation strategies:

Immediate Steps to Take

Update to a patched version of the stb_image.h library that addresses the assertion vulnerability.
Monitor for any unusual activity that could indicate exploitation of this issue.

Long-Term Security Practices

Regularly update software libraries and components to patch known vulnerabilities.
Implement network security measures to reduce the risk of unauthorized access.

Patching and Updates

Stay informed about security updates released by the library maintainers and promptly apply patches to ensure the security of your systems.