Division-by-Zero DoS in MPC-BE Media Player

Executive Summary

This vulnerability is a division-by-zero error in the CStreamSwitcherOutputPin::DecideBufferSize function of Aleksoid1978 MPC-BE software versions before a specific commit (4341cb3).

An attacker can exploit this by providing a specially crafted MP4 file that triggers the division-by-zero condition.

This causes the software to crash or become unavailable, resulting in a Denial of Service (DoS).

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Detection Guidance

This vulnerability can be detected by observing crashes or Denial of Service (DoS) conditions when MPC-BE processes specially crafted MP4 files. According to the related issue, dragging and dropping malicious media files into MPC-BE triggers crashes during file parsing.

To detect exploitation attempts, monitor for application crashes or system instability related to MPC-BE when handling MP4 files.

There are no specific commands provided to detect this vulnerability directly, but you can use system logs and crash reports to identify abnormal terminations of MPC-BE.

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Impact Analysis

Exploitation of this vulnerability can cause the affected software (MPC-BE) to crash or stop functioning properly.

This leads to a Denial of Service (DoS), meaning legitimate users may be unable to use the media player when processing certain MP4 files.

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Compliance Impact

There is no information provided in the available context or resources about how this vulnerability affects compliance with common standards and regulations such as GDPR or HIPAA.

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Mitigation Strategies

Immediate mitigation steps include avoiding opening or processing untrusted or suspicious MP4 files with MPC-BE, as the vulnerability is triggered by crafted media files.

Ensure that MPC-BE is updated to a version that includes the fix for this vulnerability once available.

Monitor for updates or patches from the MPC-BE project or related Bento4 library to address this and related vulnerabilities.

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