CVE-2025-70298: GPAC Buffer Overflow Vulnerability

CVE-2025-70298 Overview

CVE-2025-70298 is an out-of-bounds read vulnerability discovered in GPAC v2.4.0, specifically within the oggdmx_parse_tags function. This memory corruption vulnerability allows remote attackers to read beyond the allocated buffer boundaries during OGG media file parsing, potentially leading to information disclosure or denial of service conditions.

Critical Impact

Remote attackers can exploit this out-of-bounds read vulnerability via network-accessible media processing, potentially causing application crashes or leaking sensitive memory contents without requiring authentication.

Affected Products

• GPAC v2.4.0
• GPAC OGG Demuxer Component

Discovery Timeline

• 2026-01-15 - CVE CVE-2025-70298 published to NVD
• 2026-01-16 - Last updated in NVD database

Technical Details for CVE-2025-70298

Vulnerability Analysis

This vulnerability is classified as CWE-125 (Out-of-Bounds Read), a memory corruption issue that occurs when the oggdmx_parse_tags function reads data past the end of the intended buffer. The function is responsible for parsing metadata tags within OGG container files and fails to properly validate buffer boundaries before accessing memory.

The attack can be initiated remotely over the network without requiring any privileges or user interaction. When a specially crafted OGG file is processed by an application using the vulnerable GPAC library, the out-of-bounds read can expose sensitive information from adjacent memory regions or trigger an application crash resulting in denial of service.

Root Cause

The root cause of this vulnerability lies in insufficient boundary checking within the oggdmx_parse_tags function when processing OGG container metadata. The function does not adequately verify that read operations stay within the allocated buffer bounds, allowing memory access beyond the legitimate data area. This off-by-one style error in the tag parsing logic enables attackers to craft malicious OGG files that trigger reads past buffer boundaries.

Attack Vector

The vulnerability is exploitable via network-based attack vectors where a victim application processes untrusted OGG media files. Attackers can deliver malicious OGG files through various means including:

• Web applications that process user-uploaded media files
• Streaming media servers utilizing GPAC for demuxing
• Desktop media players that automatically preview or thumbnail OGG content
• Content management systems with media processing capabilities

When the malicious file is parsed, the out-of-bounds read occurs during the metadata tag extraction phase, potentially exposing memory contents or causing application instability. A proof-of-concept demonstrating this vulnerability is available in the GitHub PoC Repository.

Detection Methods for CVE-2025-70298

Indicators of Compromise

• Unexpected crashes or segmentation faults in applications using GPAC library during OGG file processing
• Abnormal memory access patterns detected by memory sanitizers (ASan, MSan) when handling OGG media files
• Increased error logs related to OGG demuxer operations or metadata parsing failures

Detection Strategies

• Deploy application-level monitoring to detect crashes or exceptions in media processing workflows utilizing GPAC
• Implement file integrity validation for OGG files before processing, checking for malformed metadata structures
• Use memory safety tools during development and testing to identify out-of-bounds access attempts
• Monitor for unusual patterns in media upload behavior that could indicate exploitation attempts

Monitoring Recommendations

• Enable detailed logging for media processing components that utilize GPAC library functions
• Implement anomaly detection for applications processing user-supplied OGG files, particularly monitoring for crash patterns
• Configure alerting for repeated parsing failures or memory-related exceptions in media handling services

How to Mitigate CVE-2025-70298

Immediate Actions Required

• Identify all applications and services using GPAC v2.4.0 for media processing
• Restrict processing of untrusted OGG files until a patched version is available
• Implement input validation to reject malformed or suspicious OGG files before processing
• Consider sandboxing media processing operations to limit potential impact from exploitation

Patch Information

At the time of publication, users should monitor the official GPAC project for security updates addressing this vulnerability. Check the GitHub PoC Repository for technical details about the vulnerability and subscribe to GPAC security announcements for patch release notifications.

Workarounds

• Disable OGG demuxer functionality if not required for your application's use case
• Implement strict file type validation and reject OGG files from untrusted sources
• Run media processing components in isolated environments with limited memory access permissions
• Deploy Web Application Firewalls (WAF) with rules to inspect and filter potentially malicious media uploads