Out-of-Bounds Read in ImageMagick

Executive Summary

This vulnerability exists in ImageMagick, a free and open-source software used for editing and manipulating digital images. Prior to versions 6.9.13-47 and 7.1.2-22, when writing an IPTC output file, a malicious input file could trigger an out of bounds read of a single byte.

An out of bounds read means the software reads memory outside the intended buffer, which can lead to unexpected behavior or crashes.

This issue has been fixed in versions 6.9.13-47 and 7.1.2-22.

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Impact Analysis

The vulnerability can cause an out of bounds read of a single byte when processing malicious input files, which may lead to application crashes or denial of service.

According to the CVSS score of 5.1, the impact is moderate with low attack complexity and no user interaction required, but it requires local access.

The confidentiality impact is low, integrity is not affected, and availability impact is low.

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Mitigation Strategies

To mitigate this vulnerability, update ImageMagick to version 6.9.13-47 or later, or 7.1.2-22 or later, where the issue has been patched.

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Compliance Impact

This vulnerability may lead to a limited confidentiality impact due to a one-byte out-of-bounds read when processing malicious input files. However, it does not significantly affect integrity or availability.

Given the limited confidentiality impact and the requirement for local access with low attack complexity, the vulnerability could pose a minor risk to compliance with standards like GDPR or HIPAA, which emphasize protection of sensitive data confidentiality.

Organizations relying on affected versions of ImageMagick should apply the patches to mitigate potential data exposure risks and maintain compliance with data protection regulations.

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Detection Guidance

This vulnerability is a heap buffer over-read occurring when ImageMagick processes a malicious input file to write an IPTC output file. Detection involves verifying the installed ImageMagick version to ensure it is patched.

You can detect if your system is vulnerable by checking the ImageMagick version installed. Versions prior to 6.9.13-47 and 7.1.2-22 are affected.

• Run the command: `magick -version` or `convert -version` to display the installed ImageMagick version.
• If the version is older than 6.9.13-47 or 7.1.2-22, your system is vulnerable.

Since the vulnerability requires local access and is triggered by processing malicious input files, monitoring for suspicious IPTC file processing or scanning files for malformed IPTC data may help, but no specific detection commands are provided.

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