CVE-2009-3717 in PatPlayer
Summary
by MITRE
Heap-based buffer overflow in LucVil PatPlayer 3.9 allows remote attackers to cause a denial of service (crash) or execute arbitrary code via a long URI in a playlist (.m3u) file.
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Analysis
by VulDB Data Team • 02/15/2025
The vulnerability identified as CVE-2009-3717 represents a critical heap-based buffer overflow flaw within LucVil PatPlayer version 3.9, a media player application that processes playlist files in m3u format. This vulnerability exposes the application to remote exploitation through maliciously crafted playlist files containing excessively long URI strings. The flaw resides in the application's insufficient input validation mechanisms when parsing playlist data, specifically failing to properly bounds-check the length of URI entries before attempting to store them in heap-allocated memory buffers. The vulnerability demonstrates characteristics consistent with CWE-121, heap-based buffer overflow, where the application allocates memory on the heap for URI storage but does not verify that incoming data fits within the allocated buffer boundaries. This oversight creates a scenario where an attacker can provide a URI string that exceeds the allocated buffer size, leading to memory corruption that can be exploited to either crash the application or execute arbitrary code with the privileges of the user running the vulnerable software.
The operational impact of this vulnerability extends beyond simple denial of service to encompass potential remote code execution capabilities, making it particularly dangerous in environments where users might encounter malicious playlist files through various attack vectors such as email attachments, web downloads, or peer-to-peer file sharing networks. When exploited, the buffer overflow can overwrite adjacent memory locations including return addresses and function pointers, potentially allowing attackers to redirect program execution flow to malicious code injected into the heap memory. This vulnerability aligns with ATT&CK technique T1203, "Exploitation for Client Execution," as it leverages application vulnerabilities to execute code on target systems through legitimate media player functionality. The attack requires minimal user interaction beyond opening the malicious playlist file, making it particularly effective for social engineering campaigns targeting unsuspecting users who might encounter such files in legitimate contexts.
Mitigation strategies for CVE-2009-3717 should prioritize immediate patching of the vulnerable LucVil PatPlayer software to version 3.10 or later, which includes proper input validation and bounds checking for URI strings in playlist files. System administrators should implement network-based protections such as web application firewalls and content filtering systems that can detect and block malicious playlist files containing overly long URI entries. Additionally, users should be educated about the risks of opening playlist files from untrusted sources, and organizations should consider implementing application whitelisting policies that restrict execution of known vulnerable applications. The vulnerability also highlights the importance of input sanitization and proper memory management practices in software development, as recommended by secure coding standards and guidelines from organizations such as the Open Web Application Security Project. Network segmentation and monitoring solutions should be deployed to detect unusual patterns of playlist file access that might indicate exploitation attempts, while regular security audits should verify that applications properly validate all input data before processing. Organizations should also consider implementing sandboxing mechanisms for media player applications to limit the potential impact of successful exploitation attempts and ensure that even if an attacker achieves code execution, they cannot directly compromise the underlying system infrastructure.