CVE-2021-37620 : What You Need to Know
Learn about CVE-2021-37620, a critical out-of-bounds read vulnerability in Exiv2 versions v0.27.4 and earlier. Understand the impact, technical details, affected systems, and mitigation steps.
A critical vulnerability, CVE-2021-37620, discovered in Exiv2 library versions v0.27.4 and earlier may allow an attacker to exploit an out-of-bounds read issue, potentially leading to a denial of service attack. Here is everything you need to know about this security flaw.
Understanding CVE-2021-37620
Exiv2 is a widely-used utility and C++ library designed for managing metadata in image files. The CVE-2021-37620 vulnerability arises due to an out-of-bounds read in the XmpTextValue::read() function.
What is CVE-2021-37620?
CVE-2021-37620 is an out-of-bounds read vulnerability in Exiv2 versions v0.27.4 and earlier. This flaw occurs when processing metadata from a manipulated image file, potentially enabling an attacker to launch a denial of service attack.
The Impact of CVE-2021-37620
The impact of this vulnerability is categorized as 'MEDIUM'. Although it requires no special privileges to exploit, an attacker must convince the victim to process a specially crafted image file using Exiv2. Successful exploitation could result in a denial of service.
Technical Details of CVE-2021-37620
The vulnerability's technical details include:
Vulnerability Description
The vulnerability stems from an out-of-bounds read issue in the XmpTextValue::read() function within Exiv2.
Affected Systems and Versions
The affected product is Exiv2, with versions up to and including v0.27.4 identified as vulnerable.
Exploitation Mechanism
To exploit CVE-2021-37620, an attacker would need to manipulate an image file that triggers the out-of-bounds read flaw, potentially leading to a denial of service.
Mitigation and Prevention
Understanding the security measures and actions required to mitigate the risk posed by CVE-2021-37620 is crucial.
Immediate Steps to Take
Users are strongly advised to update Exiv2 to version v0.27.5 or later, as this version contains the necessary patch to address the out-of-bounds read vulnerability.
Long-Term Security Practices
Implementing secure coding practices and regularly updating software can help prevent similar vulnerabilities in the future.
Patching and Updates
Stay informed about security advisories from Exiv2 and promptly apply patches to secure your systems against potential attacks.