Theora Integer Overflow Vulnerability Analysis (32-bit int overflow)

Key Information Summary Vulnerability Description Vulnerability Title: Unchecked dependencies on frame_height frame_width not overflowing a 32 bit int Vulnerability Type: Defect Product: Core Component: Audio/Video Version: 1.9.2 Branch Vulnerability Details Key Point: The Theora encoder does not check whether causes overflow of a 32-bit integer. This lack of checking may lead to potential security issues such as memory overflow or corruption. Affected Code Example: Solution and Discussion Fix Status: RESOLVED FIXED Fix Details: An overflow check for was added in the Theora library to ensure it does not exceed the 32-bit integer limit. Other Related Discussions: - Mentioned that issues with liboggplay might cause Theora to still not perform checks before frame decoding. - Discussed other potential integer overflow risks, including subsequent processing of frame data. - Noted that updating the Theora library might introduce new code paths and potential issues, but overall risk is considered low. Participants Reed Loden: Reporter and one of the discussion participants. Dan Kaminsky: Provided feedback on detailed vulnerability analysis. Timothy B. Terribeery, Chris Pearce, cajbir: Participated in discussions on fix solutions and code review. Vulnerability Impact Weakness: May lead to memory safety issues, such as buffer overflow. Impact After Fix**: Ensures frame size calculations remain within safe bounds, preventing potential security risks.

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Theora Integer Overflow Vulnerability Analysis (32-bit int overflow)