Heap-based Buffer Overflow in ImageMagick

Executive Summary

This vulnerability relates to ImageMagick, a free and open-source software used for editing and manipulating digital images. Prior to versions 6.9.13-48 and 7.1.2-23, the distributed pixel cache component of ImageMagick was designed to operate without a challenge–response authentication model. This means that the pixel cache did not verify the authenticity of requests, potentially allowing unauthorized access or manipulation.

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Mitigation Strategies

To mitigate this vulnerability, update ImageMagick to version 6.9.13-48 or later, or version 7.1.2-23 or later, where the distributed pixel cache has been changed to include a challenge–response authentication model.

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Impact Analysis

Because the distributed pixel cache lacked a challenge–response authentication model before the specified versions, an attacker with local access and high privileges could potentially exploit this to access or manipulate cached pixel data. The CVSS score indicates a low to medium severity impact with high complexity and privileges required, and the impact is primarily on confidentiality (C:H), with no impact on integrity or availability.

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Compliance Impact

The vulnerability in ImageMagick involves an information disclosure issue that poses a high risk to data confidentiality. Unauthorized access to sensitive information could potentially occur due to the lack of a challenge–response authentication model in the distributed pixel cache server.

This risk to data confidentiality could impact compliance with common standards and regulations such as GDPR and HIPAA, which require protection of sensitive data and prevention of unauthorized access.

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