CVE-2020-18831 Explained : Impact and Mitigation

Exiv2 0.27.1 Buffer Overflow Vulnerability

Understanding CVE-2020-18831

What is CVE-2020-18831?

CVE-2020-18831 is a Buffer Overflow vulnerability found in the tEXtToDataBuf function in pngimage.cpp in Exiv2 0.27.1. This vulnerability allows remote attackers to cause a denial of service and other unspecified impacts by using a crafted file.

The Impact of CVE-2020-18831

This vulnerability can lead to a denial of service and potentially other impacts when exploited by remote attackers.

Technical Details of CVE-2020-18831

Vulnerability Description

The Buffer Overflow vulnerability in the tEXtToDataBuf function in Exiv2 0.27.1 allows attackers to disrupt the service and potentially execute arbitrary code.

Affected Systems and Versions

Vendor: n/a
Product: n/a
Versions: All versions of Exiv2 0.27.1 are affected.

Exploitation Mechanism

Attackers can exploit this vulnerability by using a specially crafted file to trigger the Buffer Overflow in the tEXtToDataBuf function.

Mitigation and Prevention

Immediate Steps to Take

Update Exiv2 to a non-vulnerable version.
Avoid opening files from untrusted sources.
Implement network security measures to prevent remote attacks.

Long-Term Security Practices

Regularly update software and apply patches promptly.
Conduct security audits and vulnerability assessments.

Patching and Updates

Apply the latest patches and updates provided by Exiv2 to fix the Buffer Overflow vulnerability.