CVE-2009-4356 in WinAmp
Summary
by MITRE
Multiple integer overflows in the jpeg.w5s and png.w5s filters in Winamp before 5.57 allow remote attackers to execute arbitrary code via malformed (1) JPEG or (2) PNG data in an MP3 file.
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Analysis
by VulDB Data Team • 08/30/2021
The vulnerability identified as CVE-2009-4356 represents a critical security flaw in Winamp media player versions prior to 5.57, specifically affecting the jpeg.w5s and png.w5s filters responsible for handling image data within MP3 files. This issue stems from improper input validation and memory management within the media player's plugin architecture, creating a pathway for remote code execution through maliciously crafted multimedia content. The vulnerability operates at the intersection of multimedia processing and memory corruption, making it particularly dangerous in environments where users might unknowingly encounter compromised media files.
The technical implementation of this vulnerability involves integer overflow conditions that occur when the jpeg.w5s and png.w5s filters process malformed image data embedded within MP3 files. These filters, which are part of Winamp's extensible plugin system, fail to properly validate the dimensions and memory requirements of image data before allocating memory buffers. When attackers craft specially formatted JPEG or PNG data with intentionally oversized dimensions, the integer overflow causes the memory allocation routines to receive incorrect buffer sizes, leading to memory corruption that can be exploited to overwrite critical program memory regions. This flaw aligns with CWE-190, which specifically addresses integer overflow conditions, and represents a classic example of how improper integer handling can lead to memory corruption vulnerabilities.
The operational impact of this vulnerability extends beyond simple remote code execution, as it fundamentally compromises the security model of Winamp installations. Attackers can leverage this weakness to execute arbitrary code with the privileges of the affected user, potentially leading to complete system compromise. The vulnerability is particularly concerning because it operates within the context of media playback, where users frequently encounter content from untrusted sources, making exploitation relatively straightforward. The attack vector requires only that a user play an MP3 file containing maliciously crafted image data, making this a prevalent threat in scenarios involving peer-to-peer file sharing, web downloads, or email attachments containing compromised media files.
The exploitation of CVE-2009-4356 demonstrates the broader implications of plugin-based architecture vulnerabilities in multimedia applications, where third-party components can introduce security risks that extend far beyond their intended functionality. This vulnerability is categorized under the ATT&CK framework as a code injection technique, specifically targeting memory corruption vulnerabilities within application plugins. The flaw highlights the importance of input validation and proper memory management in software components that process untrusted data, particularly in applications that handle multimedia content where data format flexibility creates numerous potential attack surfaces. Organizations and users should prioritize immediate remediation through the installation of Winamp 5.57 or later versions, as well as implementing network-based restrictions to prevent the automatic execution of potentially malicious media files. Additionally, this vulnerability underscores the necessity of regular security updates and the implementation of sandboxing techniques to limit the potential impact of similar flaws in other multimedia applications.