CVE-2006-6539 in Winamp Web Interface
Summary
by MITRE
Multiple buffer overflows in Winamp Web Interface (Wawi) 7.5.13 and earlier (1) allow remote attackers to cause a denial of service (application crash) and possibly execute arbitrary code via an (a) long username or a (b) crafted packet to the FindBasicAuth function in security.cpp, related to the /browse URI; and allow remote authenticated users to cause a denial of service (application crash) and possibly execute arbitrary code via a long path string in the (2) Browse, (3) CControl::Download, and (4) CControl::Load functions, related to the file parameter in the /dl URI. NOTE: some of these details are obtained from third party information.
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Analysis
by VulDB Data Team • 03/26/2019
The vulnerability identified as CVE-2006-6539 represents a critical security flaw in Winamp Web Interface version 7.5.13 and earlier, affecting the Wawi component that provides web-based functionality for the popular media player. This vulnerability manifests as multiple buffer overflow conditions that can be exploited by remote attackers to compromise system integrity and availability. The flaw specifically targets the security.cpp file where the FindBasicAuth function processes authentication requests, creating potential entry points for malicious actors to manipulate the application's memory structure. The vulnerability impacts the /browse URI endpoint where the application fails to properly validate input length, particularly in username fields and packet data processing. These buffer overflows occur due to insufficient bounds checking mechanisms that allow attackers to write data beyond allocated memory buffers, leading to unpredictable application behavior.
The technical exploitation of this vulnerability involves crafting malicious input that exceeds the predetermined buffer limits in multiple functions within the Winamp Web Interface. The FindBasicAuth function in security.cpp demonstrates a classic stack-based buffer overflow when processing long username inputs or specially crafted packets, while the Browse, CControl::Download, and CControl::Load functions exhibit similar vulnerabilities when handling long path strings in the file parameter of the /dl URI. These functions lack proper input validation and sanitization, allowing attackers to overwrite adjacent memory locations with malicious code or cause application crashes through deliberate buffer overflows. The vulnerability classification aligns with CWE-121, Stack-based Buffer Overflow, and CWE-122, Heap-based Buffer Overflow, as the exploitation targets both stack and heap memory regions within the application's execution context. The attack surface extends to both unauthenticated remote exploitation through the browse URI and authenticated remote exploitation through the dl URI, expanding the potential threat landscape significantly.
The operational impact of CVE-2006-6539 extends beyond simple denial of service conditions to potentially enable remote code execution, making it particularly dangerous for systems running vulnerable Winamp Web Interface components. When exploited successfully, these buffer overflows can cause application crashes that disrupt legitimate user access while simultaneously providing attackers with opportunities to inject and execute arbitrary code on affected systems. The vulnerability affects systems where Winamp Web Interface is enabled and accessible over network connections, potentially compromising desktop environments, media servers, or any system hosting vulnerable media player installations. The combination of remote exploitability and potential code execution capabilities places this vulnerability in the high-risk category according to standard security frameworks, as it can be leveraged for persistent system compromise. The vulnerability's impact is amplified by the fact that it affects multiple functions within the same component, indicating a systemic design flaw in input validation rather than isolated issues.
Mitigation strategies for CVE-2006-6539 should prioritize immediate patching of vulnerable Winamp Web Interface installations to version 7.5.14 or later where the buffer overflow conditions have been addressed. System administrators should disable the web interface component entirely if it is not required for operations, as this eliminates the attack surface entirely. Network segmentation and access controls should be implemented to limit exposure of vulnerable systems to untrusted networks, particularly blocking access to the affected URIs. Input validation should be enhanced at multiple layers including application-level bounds checking, network-level filtering, and regular security audits to identify similar vulnerabilities in other components. The remediation process should include thorough testing of patched systems to ensure that the buffer overflow conditions have been properly resolved without introducing regressions in functionality. Additionally, monitoring systems should be configured to detect unusual network traffic patterns that might indicate exploitation attempts, as these buffer overflows often generate specific network signatures that can be used for threat detection. According to ATT&CK framework, this vulnerability maps to T1203, Exploitation for Client Execution, and T1499, Endpoint Denial of Service, as it enables both code execution and service disruption attacks against affected systems.