CVE-2003-1273 in WinAmp
Summary
by MITRE
Winamp 3.0 allows remote attackers to cause a denial of service (crash) via a .b4s file with a playlist name that contains some non-English characters, e.g. Cyrillic characters.
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Analysis
by VulDB Data Team • 06/16/2018
The vulnerability identified as CVE-2003-1273 represents a classic buffer overflow condition affecting Winamp version 3.0, specifically when processing playlist files with non-English character encoding. This issue stems from inadequate input validation within the media player's playlist parsing mechanism, where the application fails to properly handle multibyte character sequences in playlist names. The flaw manifests when a maliciously crafted .b4s playlist file contains Cyrillic or other non-ASCII characters that trigger memory corruption during string processing operations. From a cybersecurity perspective, this vulnerability aligns with CWE-121, which describes stack-based buffer overflow conditions, and represents a significant concern for systems where media players handle untrusted content from external sources.
The technical execution of this vulnerability relies on the specific handling of character encoding within Winamp's playlist parser, where the application's internal buffer management does not account for the variable-length encoding requirements of international character sets. When the player attempts to parse a playlist name containing Cyrillic characters, the parsing routine encounters unexpected byte sequences that exceed allocated buffer boundaries, leading to memory corruption and subsequent application crash. This behavior constitutes a denial of service condition that can be reliably triggered by remote attackers through the simple act of distributing a malicious .b4s file. The vulnerability demonstrates poor input sanitization practices that have been extensively documented in cybersecurity literature as a primary vector for exploitation.
Operationally, this vulnerability creates a significant risk for users who may unknowingly download or receive playlist files from untrusted sources, particularly in environments where media sharing occurs frequently. The remote attack vector means that adversaries can exploit this weakness without requiring local system access, making it particularly dangerous in networked environments or when users engage with peer-to-peer file sharing systems. The impact extends beyond simple service disruption to potentially compromise user experience and system availability, especially in enterprise environments where media players are widely used for entertainment or presentation purposes. From an ATT&CK framework perspective, this vulnerability maps to initial access and execution phases, where the adversary gains the ability to disrupt services through crafted media content.
Mitigation strategies for this vulnerability should include immediate software updates to patched versions of Winamp that address the buffer overflow condition in playlist handling. System administrators should implement strict file validation policies that prevent execution of unknown playlist files, particularly those with international character sets. Network-based controls such as content filtering and sandboxing of media file processing can provide additional defense layers. Users should be educated about the risks of opening playlist files from untrusted sources and the importance of maintaining updated media player software. The vulnerability also highlights the importance of robust international character set handling in software development, emphasizing the need for proper input validation and buffer management practices that align with security best practices established in industry standards such as those outlined in the OWASP Top Ten and NIST cybersecurity guidelines.