CVE-2017-10728 in WinAmp
Summary
by MITRE
Winamp 5.666 Build 3516(x86) might allow attackers to execute arbitrary code or cause a denial of service via a crafted .flv file, related to "Error Code (0xe06d7363) starting at wow64!Wow64NotifyDebugger+0x000000000000001d."
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Analysis
by VulDB Data Team • 05/31/2020
The vulnerability identified as CVE-2017-10728 affects Winamp 5.666 Build 3516 x86 version and represents a critical security flaw that enables remote code execution or denial of service through manipulation of .flv media files. This vulnerability specifically manifests when the application processes malformed or crafted .flv files, triggering an error condition that can be exploited by malicious actors to gain unauthorized system access or disrupt normal application functionality. The error code 0xe06d7363 and its association with wow64!Wow64NotifyDebugger function indicate that the issue occurs within the Windows WOW64 subsystem, suggesting a complex interaction between 32-bit application execution and the underlying operating system's compatibility layer. This particular flaw falls under the category of buffer overflow vulnerabilities as defined by CWE-121, where insufficient boundary checking allows attackers to overwrite memory locations and potentially execute malicious code. The vulnerability is particularly concerning because Winamp is a widely used media player that many users trust for handling various multimedia formats, making it an attractive target for exploit developers.
The technical implementation of this vulnerability involves the improper handling of .flv file structures within Winamp's media processing pipeline. When a crafted .flv file is loaded, the application fails to properly validate the file's header information and stream data, leading to memory corruption that can be leveraged by attackers. The specific error condition at wow64!Wow64NotifyDebugger suggests that the exploitation process involves manipulation of the Windows debugging interface through WOW64 subsystem functions, which is a sophisticated approach that requires understanding of both application-level and operating system-level memory management. This type of vulnerability represents a classic example of a heap-based buffer overflow as classified by CWE-122, where the application allocates memory on the heap for processing media data but fails to properly bounds-check the data being written. The exploitation can potentially lead to arbitrary code execution with the privileges of the user running Winamp, making it a significant threat to system security.
From an operational perspective, this vulnerability presents substantial risks to end users and organizations that rely on Winamp for media playback. The attack vector is relatively simple and does not require advanced technical skills to exploit, as users only need to open a maliciously crafted .flv file to trigger the vulnerability. This makes the vulnerability particularly dangerous in environments where users may encounter untrusted media files through email attachments, web downloads, or peer-to-peer file sharing networks. The potential for denial of service attacks means that even if code execution cannot be achieved, attackers can still disrupt legitimate system operations by causing Winamp to crash or become unresponsive. The vulnerability aligns with ATT&CK technique T1203, which covers exploitation of software vulnerabilities, and T1059, covering command and scripting interpreter usage, as exploitation may involve execution of malicious payloads through the compromised application. Organizations using Winamp should be particularly concerned about this vulnerability as it affects a commonly used media player that many users keep running continuously.
Mitigation strategies for CVE-2017-10728 should include immediate application updates from the vendor, as no public patches were available for this specific vulnerability at the time of reporting. Users should avoid opening .flv files from untrusted sources and should implement strict file validation policies for multimedia content. System administrators should consider implementing application whitelisting to prevent unauthorized media player installations and should monitor for suspicious file access patterns. Network-level defenses such as content filtering and sandboxing of media files can provide additional protection layers. The vulnerability also highlights the importance of maintaining current software versions and implementing robust security practices around media handling applications. Organizations should consider transitioning away from older media players like Winamp to more modern alternatives that receive regular security updates and have better security track records. The vulnerability demonstrates the critical importance of proper input validation and memory management in multimedia processing applications, as similar issues have been identified in numerous other media players and codecs that have been subject to similar exploitation techniques.