MediaInfoLib ID3v2 Heap Buffer Overflow

Executive Summary

This vulnerability is a heap-based buffer overflow in the ID3v2 parsing functionality of MediaInfoLib version 26.01. It occurs because the library does not properly validate buffer sizes when processing unsynchronization patterns in ID3v2 tags. An attacker can exploit this flaw by crafting a malicious media file with specially designed ID3v2 tags that trigger memory manipulation, potentially leading to arbitrary code execution.

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Detection Guidance

This vulnerability can be detected by identifying the presence of vulnerable versions of MediaInfoLib, specifically version 26.01 or earlier, which contain the heap-based buffer overflow in the ID3v2 parsing functionality.

Detection on your system can involve scanning for media files with crafted ID3v2 tags that trigger the vulnerability, or checking the version of MediaInfoLib installed.

Suggested commands include:

• Check MediaInfoLib version: `mediainfo --version` or check package manager for installed version.
• Scan media files for suspicious ID3v2 tags using specialized scripts or tools designed to parse and validate ID3v2 tags.
• Monitor system logs and application crash reports for signs of heap buffer overflow or crashes related to MediaInfoLib.

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Impact Analysis

This vulnerability can have severe impacts including allowing an attacker to execute arbitrary code on the affected system. This could lead to unauthorized control over the system, data corruption, or denial of service. Since the vulnerability has a high CVSS score of 7.8, it represents a significant security risk, especially if the vulnerable library is used in applications that process untrusted media files.

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Compliance Impact

The vulnerability allows for arbitrary code execution through a heap-based buffer overflow in MediaInfoLib's ID3v2 parsing functionality. This could potentially lead to unauthorized access, data corruption, or system compromise.

Such security breaches may impact compliance with standards and regulations like GDPR and HIPAA, which require protection of sensitive data and maintaining system integrity. Exploitation of this vulnerability could result in unauthorized disclosure or alteration of protected information, thereby violating these regulations.

However, the provided information does not explicitly detail the direct impact on compliance with these standards.

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Mitigation Strategies

The immediate mitigation step is to update MediaInfoLib to the patched version released by the vendor on May 12, 2026.

Avoid processing untrusted or specially crafted media files containing ID3v2 tags until the update is applied.

Implement application-level restrictions to limit the processing of media files from untrusted sources.

Monitor for any unusual behavior or crashes in applications using MediaInfoLib and apply security patches promptly.

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