CVE-2019-13111 Explained : Impact and Mitigation
Learn about CVE-2019-13111, an integer overflow vulnerability in Exiv2 through version 0.27.1, allowing attackers to trigger denial of service attacks by exploiting specially crafted WEBP image files. Find mitigation steps and prevention measures here.
An integer overflow vulnerability in the WebPImage::decodeChunks function in Exiv2 through version 0.27.1 can be exploited by an attacker to trigger a denial of service attack. This attack involves a large heap allocation followed by a lengthy loop, and can be accomplished by providing a specially crafted WEBP image file.
Understanding CVE-2019-13111
This CVE entry describes a specific vulnerability in the Exiv2 software.
What is CVE-2019-13111?
CVE-2019-13111 is an integer overflow vulnerability in the WebPImage::decodeChunks function in Exiv2 through version 0.27.1.
The Impact of CVE-2019-13111
The vulnerability can be exploited by an attacker to cause a denial of service attack by providing a specially crafted WEBP image file. This can lead to a large heap allocation and a lengthy loop, impacting system availability.
Technical Details of CVE-2019-13111
This section provides more technical insights into the CVE.
Vulnerability Description
The vulnerability lies in the WebPImage::decodeChunks function in Exiv2 through version 0.27.1, allowing an attacker to trigger a denial of service attack.
Affected Systems and Versions
- Affected Version: Exiv2 through version 0.27.1
- Systems: Exiv2 software
Exploitation Mechanism
The exploitation involves providing a specially crafted WEBP image file to trigger a large heap allocation followed by a lengthy loop, leading to a denial of service attack.
Mitigation and Prevention
Protecting systems from CVE-2019-13111 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Update Exiv2 to a non-vulnerable version if available.
- Implement file input validation to prevent the processing of malicious WEBP image files.
Long-Term Security Practices
- Regularly update software and apply security patches.
- Conduct security assessments and audits to identify and mitigate vulnerabilities.
Patching and Updates
- Stay informed about security advisories and updates from Exiv2.
- Apply patches promptly to address known vulnerabilities.