CVE-2019-20421 Explained : Impact and Mitigation
Learn about CVE-2019-20421, a security flaw in Exiv2 0.27.2 that can lead to system hang and high CPU usage. Find out how to mitigate this vulnerability and protect your systems.
A security vulnerability has been identified in Jp2Image::readMetadata() function in jp2image.cpp within the Exiv2 0.27.2 software. This flaw can potentially lead to an infinite loop and system hang, causing high CPU usage. Exploitation of this vulnerability by malicious individuals could result in a denial of service scenario by sending a specially crafted file.
Understanding CVE-2019-20421
This CVE-2019-20421 vulnerability affects the Exiv2 software version 0.27.2, potentially leading to a denial of service due to an infinite loop and high CPU consumption.
What is CVE-2019-20421?
CVE-2019-20421 is a security vulnerability in the Jp2Image::readMetadata() function in Exiv2 0.27.2, allowing remote attackers to trigger a denial of service by exploiting the flaw with a crafted file.
The Impact of CVE-2019-20421
- The vulnerability can cause an infinite loop and system hang, leading to high CPU usage.
- Malicious actors could exploit this flaw to launch denial of service attacks by sending specially crafted files.
Technical Details of CVE-2019-20421
This section provides detailed technical information about the vulnerability.
Vulnerability Description
The vulnerability in Jp2Image::readMetadata() in jp2image.cpp in Exiv2 0.27.2 can result in an infinite loop and hang, with high CPU consumption.
Affected Systems and Versions
- Product: Exiv2
- Version: 0.27.2
Exploitation Mechanism
- Attackers can exploit this vulnerability by sending a specially crafted file to trigger the infinite loop and high CPU usage.
Mitigation and Prevention
Protecting systems from CVE-2019-20421 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Update Exiv2 software to a patched version that addresses the vulnerability.
- Implement network-level protections to filter out potentially malicious files.
Long-Term Security Practices
- Regularly update software and apply security patches promptly.
- Conduct security assessments and audits to identify and mitigate vulnerabilities.
Patching and Updates
- Stay informed about security advisories and updates from Exiv2 and relevant vendors.
- Apply patches and updates as soon as they are available to prevent exploitation of known vulnerabilities.