CVE-2012-4045 in WinAmp
Summary
by MITRE
Multiple heap-based buffer overflows in bmp.w5s in Winamp before 5.63 build 3235 allow remote attackers to execute arbitrary code via the (1) strf chunk in BI_RGB or (2) UYVY video data in an AVI file, or (3) decompressed TechSmith Screen Capture Codec (TSCC) data in an AVI file.
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Analysis
by VulDB Data Team • 04/27/2018
The vulnerability identified as CVE-2012-4045 represents a critical heap-based buffer overflow flaw within the bmp.w5s component of Winamp media player software. This vulnerability affects versions prior to 5.63 build 3235 and presents a significant security risk due to its remote execution capabilities. The flaw exists in how the software processes various multimedia file formats, specifically targeting the handling of AVI files with different compression codecs and data structures.
The technical implementation of this vulnerability occurs through three distinct attack vectors that all leverage heap memory corruption. The first vector involves manipulation of the strf chunk within AVI files when using BI_RGB compression format, while the second target is UYVY video data processing in AVI containers. The third vector targets decompressed data from the TechSmith Screen Capture Codec (TSCC) within AVI files. All three attack paths exploit the same underlying memory management flaw where insufficient bounds checking allows attackers to write beyond allocated heap memory boundaries, potentially leading to arbitrary code execution.
From an operational perspective, this vulnerability presents severe implications for system security as it enables remote code execution without requiring user interaction beyond opening a malicious file. Attackers can craft specially formatted AVI files that trigger the buffer overflow conditions when processed by vulnerable Winamp installations. The heap-based nature of the vulnerability means that successful exploitation could result in complete system compromise, allowing attackers to execute malicious payloads with the privileges of the affected user. This makes the vulnerability particularly dangerous in enterprise environments where media players are commonly used for entertainment or presentation purposes.
The vulnerability maps to CWE-121 Heap-based Buffer Overflow, which is categorized under the Common Weakness Enumeration framework, and aligns with several ATT&CK techniques including T1059 Command and Scripting Interpreter and T1203 Exploitation for Client Execution. The attack surface is broad as AVI files are widely used multimedia containers that can be distributed through various channels including email attachments, malicious websites, and peer-to-peer networks. Organizations should prioritize patching affected systems and implementing network segmentation to limit the potential impact of exploitation attempts.
Mitigation strategies should include immediate deployment of the vendor-provided security patches for Winamp version 5.63 build 3235 or later, which address the heap overflow conditions through proper input validation and bounds checking. Network administrators should consider implementing file type restrictions for AVI files in email gateways and web proxies, while endpoint protection solutions should be configured to monitor for suspicious file processing behavior. Additionally, user education regarding the dangers of opening untrusted multimedia files remains crucial in reducing the attack surface. System administrators should also monitor for exploitation attempts through log analysis and implement application whitelisting policies to prevent execution of unpatched versions of the vulnerable software.