CVE-2021-22563 : Security Advisory and Response
Discover the impact, technical details, and mitigation strategies for CVE-2021-22563 in libjxl by Google LLC. Learn how to address this out-of-bounds access vulnerability.
A detailed overview of CVE-2021-22563 highlighting its impact, technical details, and mitigation strategies.
Understanding CVE-2021-22563
This section delves into the specifics of the vulnerability identified as CVE-2021-22563.
What is CVE-2021-22563?
The vulnerability in libjxl by Google LLC allows for out-of-bounds access when rendering splines from invalid JPEG XL images. This could result in a segfault or rendering based on other process memory. Upgrading past version 0.6.0 is advised.
The Impact of CVE-2021-22563
With a CVSS base score of 4.5, this vulnerability poses a medium severity risk. It has a high attack complexity and requires local access but has low availability, confidentiality, and integrity impacts. Privileges required are low.
Technical Details of CVE-2021-22563
Explore the specifics of the vulnerability to understand its implications further.
Vulnerability Description
The issue in libjxl results in an out-of-bounds access on a std::vector<std::vector<T>> when processing splines from malformed JPEG XL images.
Affected Systems and Versions
The vulnerability affects versions of libjxl up to and including 0.6.0, where it is possible to trigger the out-of-bounds access.
Exploitation Mechanism
Exploiting this vulnerability involves rendering splines from crafted JPEG XL images to trigger the out-of-bounds access.
Mitigation and Prevention
Discover the steps to mitigate the risks associated with CVE-2021-22563.
Immediate Steps to Take
Users are advised to upgrade libjxl beyond version 0.6.0 to prevent the vulnerability exposure. Alternatively, applying the patch available at the provided GitHub link can address the issue.
Long-Term Security Practices
Incorporating secure coding practices and regular vulnerability assessments can enhance the overall security posture to mitigate such risks.
Patching and Updates
Regularly applying security patches and updates for the affected software is crucial to address known vulnerabilities and protect systems from potential exploits.