CVE-2008-4201 in FAAD2
Summary
by MITRE
Heap-based buffer overflow in the decodeMP4file function (frontend/main.c) in FAAD2 2.6.1 and earlier allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a crafted MPEG-4 (MP4) file.
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Analysis
by VulDB Data Team • 08/20/2019
The vulnerability identified as CVE-2008-4201 represents a critical heap-based buffer overflow within the FAAD2 audio decoder library version 2.6.1 and earlier. This flaw exists in the decodeMP4file function located in the frontend/main.c source file, making it a significant security concern for systems that process MPEG-4 audio files. The vulnerability classifies under CWE-121 as a heap-based buffer overflow, which occurs when more data is written to a buffer allocated on the heap than the buffer can accommodate, leading to memory corruption that can be exploited by malicious actors.
The technical exploitation of this vulnerability involves crafting a specially designed MP4 file that triggers the buffer overflow during the decoding process. When the vulnerable FAAD2 library processes such a malformed file, the decodeMP4file function fails to properly validate input data lengths, causing the heap memory to be overwritten beyond its allocated boundaries. This memory corruption can result in unpredictable program behavior, including application crashes that manifest as denial of service conditions. The vulnerability's potential for arbitrary code execution stems from the ability of attackers to manipulate the heap layout and overwrite critical program data or function pointers, which aligns with ATT&CK technique T1059.007 for command and scripting interpreter execution.
The operational impact of CVE-2008-4201 extends beyond simple service disruption to encompass potential system compromise across various platforms where FAAD2 is integrated. Systems utilizing this library for media processing, streaming services, multimedia applications, and embedded devices become vulnerable to remote exploitation. The vulnerability affects not only desktop applications but also server-side systems that handle media file processing, making it particularly dangerous in enterprise environments where media handling is common. The exploitation requires remote access to the target system through the delivery of malicious MP4 files, which can be achieved through various attack vectors including web downloads, email attachments, or file sharing platforms.
Mitigation strategies for this vulnerability primarily involve immediate patching of affected systems with updated FAAD2 versions that contain proper input validation and buffer boundary checks. Organizations should implement comprehensive vulnerability management processes to identify all systems utilizing FAAD2 and ensure timely updates are deployed. Network segmentation and file validation controls can provide additional defense-in-depth measures, while monitoring systems should be configured to detect unusual file processing patterns that might indicate exploitation attempts. The vulnerability demonstrates the importance of input validation in multimedia libraries and highlights the need for robust memory safety practices in audio and video processing components. Security teams should also consider implementing sandboxing techniques for media file processing and establishing secure coding guidelines that prevent similar buffer overflow conditions in custom multimedia applications.