Uninitialized Memory Disclosure in FFmpeg

Executive Summary

This vulnerability in FFmpeg through 9.0.2 involves an uninitialized memory disclosure issue in the raw_decode() function within libavcodec/rawdec.c. The flaw occurs because the function does not properly verify if a packet stride covers a full row for video with 1 to 8 bits per pixel. Attackers can exploit this by providing specially crafted AVI, MOV, or NUT files containing truncated low bit depth rawvideo packets, which causes the decoder to leak uninitialized heap memory through the decoded frame output.

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Detection Guidance

Detecting this vulnerability requires analyzing FFmpeg versions and inspecting media files for potential malicious payloads. Check FFmpeg version with 'ffmpeg -version' and look for versions through 9.0.2. Scan files with tools like 'ffprobe' or 'mediainfo' for truncated low bit depth rawvideo packets in AVI, MOV, or NUT formats.

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Impact Analysis

This vulnerability could allow attackers to access sensitive or confidential information stored in memory, potentially leading to data leaks or unauthorized access. If exploited, it may expose uninitialized memory contents, which could include sensitive data processed by the application using FFmpeg.

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Compliance Impact

This vulnerability could lead to non-compliance with data protection regulations like GDPR or HIPAA by enabling unauthorized access to sensitive data. If exploited, it may result in data breaches, violating confidentiality requirements and potentially leading to legal penalties or reputational damage.

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Mitigation Strategies

Immediately update FFmpeg to the latest version beyond 9.0.2. Avoid processing untrusted media files, especially AVI, MOV, or NUT formats with low bit depth rawvideo packets. Implement network-level controls to block suspicious file transfers.

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