CVE-2020-25676 Explained : Impact and Mitigation
Learn about CVE-2020-25676, a vulnerability in ImageMagick that allows attackers to trigger undefined behavior. Find out how to mitigate the impact and prevent exploitation.
CVE-2020-25676 is a vulnerability in ImageMagick that allows attackers to trigger undefined behavior by providing a crafted input file. This could impact application availability and cause other issues.
Understanding CVE-2020-25676
What is CVE-2020-25676?
In functions within /MagickCore/pixel.c, ImageMagick had unconstrained pixel offset calculations using the floor() function, leading to undefined behavior like out-of-range and integer overflows.
The Impact of CVE-2020-25676
This vulnerability could be exploited by attackers to disrupt application availability and potentially cause problems related to undefined behavior.
Technical Details of CVE-2020-25676
Vulnerability Description
- Unconstrained pixel offset calculations in ImageMagick functions
- Usage of the floor() function leading to undefined behavior
Affected Systems and Versions
- Vendor: n/a
- Product: ImageMagick
- Affected Versions: prior to 7.0.9-0
Exploitation Mechanism
- Crafted input file supplied by an attacker triggers the vulnerability
Mitigation and Prevention
Immediate Steps to Take
- Update ImageMagick to version 7.0.9-0 or later
- Implement input validation to prevent crafted files
Long-Term Security Practices
- Regularly update software and libraries
- Conduct security audits and code reviews
Patching and Updates
- Apply security patches promptly