Divide by Zero in vgmstream Microsoft IMA Decoder

Executive Summary

This vulnerability is a divide-by-zero issue in the vgmstream library up to version r2117. It occurs in the decode_ms_ima function of the Microsoft IMA Decoder component when processing malformed RIFF/WAVE audio files. The flaw allows attackers to cause a denial-of-service by exploiting invalid channel geometry or block size values in the file headers.

Useful 0 Not Useful 0

Detection Guidance

To detect this vulnerability, monitor for crashes or hangs in applications using vgmstream when processing audio files. Check for divide-by-zero errors in logs. Use tools like 'strings' or 'hexdump' to inspect RIFF/WAVE file headers for malformed channel or block size values.

Useful 0 Not Useful 0

Impact Analysis

If you use applications that rely on vgmstream to process untrusted audio files, an attacker could exploit this flaw to crash the application. This could disrupt services or prevent users from accessing media content. The impact is limited to denial-of-service as no code execution or data theft is possible.

Useful 0 Not Useful 0

Compliance Impact

This vulnerability, a divide-by-zero issue in vgmstream's Microsoft IMA Decoder, could lead to denial-of-service attacks by crashing applications processing untrusted audio files. While not directly violating GDPR or HIPAA, such crashes may disrupt systems handling sensitive data, potentially causing data processing interruptions or loss of availability. Compliance risks arise if the affected software processes personal health information (HIPAA) or personal data (GDPR) and fails to maintain availability or integrity due to the vulnerability.

Useful 0 Not Useful 0

Mitigation Strategies

Update vgmstream to the latest version with safeguards in decode_ms_ima(). Validate audio file headers before processing to ensure channel and block size values are positive. Restrict untrusted audio file processing to prevent exploitation.

Useful 0 Not Useful 0