CVE-2018-20096 Explained : Impact and Mitigation

Exiv2 version 0.27-RC3 has a vulnerability in the pngimage.cpp file, leading to a heap-based buffer over-read in the Exiv2::tEXtToDataBuf function. This flaw can be exploited by attackers to trigger a remote denial of service attack.

Understanding CVE-2018-20096

This CVE entry highlights a specific vulnerability in the Exiv2 software version 0.27-RC3.

What is CVE-2018-20096?

The vulnerability in the pngimage.cpp file of Exiv2 version 0.27-RC3 allows for a heap-based buffer over-read in the Exiv2::tEXtToDataBuf function. Attackers can exploit this issue by providing a specially crafted input, resulting in a remote denial of service attack.

The Impact of CVE-2018-20096

The vulnerability poses a risk of remote denial of service attacks, potentially affecting systems running the vulnerable Exiv2 version 0.27-RC3.

Technical Details of CVE-2018-20096

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Vulnerability Description

The vulnerability lies in the Exiv2::tEXtToDataBuf function of pngimage.cpp in Exiv2 0.27-RC3, enabling a remote denial of service attack through a crafted input.

Affected Systems and Versions

Product: N/A
Vendor: N/A
Version: N/A

Exploitation Mechanism

Attackers can exploit this vulnerability by providing a specially crafted input to trigger the heap-based buffer over-read in the Exiv2::tEXtToDataBuf function.

Mitigation and Prevention

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Immediate Steps to Take

Update Exiv2 to a non-vulnerable version if available.
Implement network security measures to prevent unauthorized access.

Long-Term Security Practices

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

Patching and Updates

Stay informed about security advisories and updates from Exiv2.
Apply patches promptly to address known vulnerabilities.