Resource Exhaustion in vgmstream txtp Parser

Executive Summary

This vulnerability exists in vgmstream up to r2117, specifically in the txtp_parser.c file. It involves improper handling of range_start/range_end arguments in the add_entry function, leading to resource consumption issues. Attackers can exploit this remotely by crafting malicious input that triggers excessive memory and CPU usage.

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Detection Guidance

To detect this vulnerability, monitor for unusual CPU or memory usage spikes when processing audio files with TXTP playlists. Check for files with large subsong ranges like #1~2147483647. Use system monitoring tools such as 'top', 'htop', or 'ps' to observe resource consumption during file processing.

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Impact Analysis

This vulnerability can cause denial-of-service conditions by exhausting system resources. Applications using vgmstream may crash, freeze, or become unresponsive when processing specially crafted TXTP files with large subsong ranges. For example, a small input like ?#1~2147483647 can request billions of entries, consuming excessive memory and CPU.

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Compliance Impact

This vulnerability could potentially impact compliance with GDPR and HIPAA by enabling denial-of-service attacks that disrupt services handling personal or health data. Unbounded resource consumption may lead to service unavailability, violating availability requirements in these regulations.

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Mitigation Strategies

Apply the patch from commit 4b6a02dd1aff6428255db912563d77d4cb0a143e. Update vgmstream to the latest version. Disable or restrict processing of TXTP files from untrusted sources. Implement input validation to reject invalid subsong ranges in TXTP files.

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