CVE-2001-0242 in Windows Media Player
Summary
by MITRE
Buffer overflows in Microsoft Windows Media Player 7 and earlier allow remote attackers to execute arbitrary commands via (1) a long version tag in an .ASX file, or (2) a long banner tag, a variant of the ".ASX Buffer Overrun" vulnerability as discussed in MS:MS00-090.
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Analysis
by VulDB Data Team • 12/30/2024
The vulnerability described in CVE-2001-0242 represents a critical buffer overflow flaw affecting Microsoft Windows Media Player versions 7 and earlier. This vulnerability manifests through improper input validation when processing specially crafted .ASX (Advanced Stream Redirector) files, which are commonly used for media streaming and playlist management. The flaw exists in the parsing logic that handles version and banner tags within these files, creating opportunities for malicious actors to exploit memory corruption vulnerabilities.
The technical implementation of this vulnerability involves buffer overflow conditions that occur when the Windows Media Player processes excessively long version or banner tags within .ASX files. When the player encounters these malformed tags, it fails to properly validate the input length before copying data into fixed-size buffers, leading to memory corruption that can be exploited to execute arbitrary code. This type of vulnerability falls under CWE-121, which specifically addresses stack-based buffer overflow conditions, and CWE-122, which covers heap-based buffer overflow scenarios. The vulnerability demonstrates characteristics of both stack and heap corruption depending on how the malicious input is structured during the parsing process.
The operational impact of this vulnerability is significant as it allows remote attackers to execute arbitrary commands on affected systems without requiring authentication. An attacker could craft malicious .ASX files containing overly long version or banner tags and distribute them through various means such as email attachments, web downloads, or compromised websites. When a victim opens these files with vulnerable Windows Media Player versions, the buffer overflow occurs during file parsing, potentially allowing attackers to gain full control of the affected system. This vulnerability aligns with ATT&CK technique T1203, which covers exploitation for privilege escalation, and T1059, covering command and scripting interpreters for execution.
The exploitation of this vulnerability typically follows a pattern where attackers first create malicious .ASX files with oversized tags that exceed the buffer capacity allocated by Windows Media Player. The attack vector operates remotely since the vulnerability does not require user interaction beyond opening the malicious file, though user interaction may be required to execute the file in certain configurations. The attack surface includes any system running Windows Media Player 7 or earlier versions, making it particularly dangerous given the widespread adoption of these older media player versions. Microsoft addressed this vulnerability through MS00-090, which included patches for Windows Media Player and related components. Organizations should prioritize updating to patched versions of Windows Media Player and implementing network segmentation to limit exposure to potentially malicious content.
Mitigation strategies for this vulnerability include immediate deployment of Microsoft security patches, disabling automatic execution of .ASX files, and implementing network-based filtering to block suspicious content. System administrators should also consider implementing application whitelisting policies to prevent execution of untrusted media files. The vulnerability highlights the importance of proper input validation and bounds checking in media processing applications, as well as the need for regular security updates. Organizations should also consider implementing security awareness training to prevent users from opening suspicious files and establish procedures for handling potentially malicious media content. The vulnerability serves as a reminder of the critical importance of maintaining current security patches and the risks associated with running outdated software components.