CVE-2017-8906 Explained : Impact and Mitigation
Learn about CVE-2017-8906, a vulnerability in MulticoreWare x265 versions up to 2.4, causing a Denial of Service due to an integer underflow when encoding small pictures. Find mitigation steps and preventive measures here.
A vulnerability in the x86 assembly code used by MulticoreWare x265 versions up to 2.4 can lead to a Denial of Service due to an integer underflow when encoding small pictures.
Understanding CVE-2017-8906
This CVE identifies a specific vulnerability in the x265_encoder_encode dependency used by various products.
What is CVE-2017-8906?
The vulnerability in the x86 assembly code, particularly in pixel-a.asm, allows for an integer underflow during the encoding process of small pictures, resulting in a Denial of Service.
The Impact of CVE-2017-8906
The vulnerability can be exploited to cause a Denial of Service, affecting the availability of the system and potentially disrupting operations.
Technical Details of CVE-2017-8906
This section provides more technical insights into the vulnerability.
Vulnerability Description
The vulnerability arises in the x86 assembly code used by MulticoreWare x265 versions up to 2.4, impacting the planeClipAndMax() function and leading to an integer underflow during small picture encoding.
Affected Systems and Versions
- Affected versions: MulticoreWare x265 up to 2.4
- Products affected: x265_encoder_encode dependency in libbpg and related products
Exploitation Mechanism
The vulnerability is exploited by encoding small pictures, triggering an integer underflow that results in a Denial of Service.
Mitigation and Prevention
Protecting systems from CVE-2017-8906 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Update to a patched version of MulticoreWare x265 beyond 2.4 to mitigate the vulnerability.
- Monitor for any unusual activities that could indicate exploitation of the vulnerability.
Long-Term Security Practices
- Regularly update software and dependencies to ensure known vulnerabilities are addressed promptly.
- Implement secure coding practices to prevent similar vulnerabilities in the future.
Patching and Updates
- Apply patches provided by MulticoreWare to fix the vulnerability and enhance system security.