CVE-2011-10025 in Subtitle Processor
Summary
by MITRE • 08/20/2025
Subtitle Processor 7.7.1 contains a buffer overflow vulnerability in its .m3u file parser. When a crafted playlist file is opened, the application converts input to Unicode and copies it to a fixed-size stack buffer without proper bounds checking. This allows an attacker to overwrite the Structured Exception Handler (SEH) and execute arbitrary code.
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Analysis
by VulDB Data Team • 08/20/2025
The vulnerability identified as CVE-2011-10025 affects Subtitle Processor version 7.7.1 and represents a critical buffer overflow condition within its media playlist file parser. This flaw specifically manifests when processing .m3u playlist files, which are commonly used to organize multimedia content and specify sequences of audio or video files. The vulnerability stems from inadequate input validation and memory management practices within the application's handling of playlist data, creating a pathway for malicious code execution through carefully crafted input files.
The technical implementation of this vulnerability involves a classic stack-based buffer overflow scenario where the application processes user-supplied data without proper bounds checking. When a malicious .m3u file is loaded, the software converts the input to Unicode format and subsequently copies this data into a fixed-size stack buffer. This copying operation occurs without verification of buffer boundaries, allowing an attacker to exceed the allocated memory space. The overflow specifically targets the Structured Exception Handler (SEH) chain, which is a critical component of windows exception handling mechanisms that manages program flow during runtime errors and exceptions.
The operational impact of this vulnerability extends beyond simple code execution, as it provides attackers with potential for complete system compromise. By overwriting the SEH record, an attacker can redirect program execution flow to malicious code injected within the buffer overflow payload. This technique aligns with attack patterns described in the attack tree framework and represents a well-established method for privilege escalation and system control. The vulnerability's exploitability is enhanced by the fact that it requires minimal user interaction, typically only the opening of a maliciously crafted playlist file, making it particularly dangerous in environments where users might encounter untrusted media content.
Security professionals should note that this vulnerability maps directly to CWE-121, which describes stack-based buffer overflow conditions, and demonstrates the critical importance of proper input validation and memory management in software development. The flaw also relates to ATT&CK technique T1059, specifically the execution of malicious code through application vulnerabilities. Mitigation strategies must include immediate patching of affected versions, implementation of input validation controls, and deployment of application whitelisting solutions to prevent execution of untrusted playlist files. Additionally, system administrators should consider implementing network-based intrusion detection systems to monitor for exploitation attempts and establish comprehensive software update policies to address similar vulnerabilities in multimedia processing applications.
The broader implications of this vulnerability highlight the persistent challenges in multimedia software security, where complex file format parsers often contain numerous potential attack surfaces. This particular flaw underscores the necessity for robust software security practices including automated code review processes, memory safety checks, and comprehensive testing of input handling routines. Organizations utilizing multimedia processing applications must maintain vigilance against similar vulnerabilities that could arise from insufficient bounds checking in file parsing operations, particularly in applications that handle untrusted user input.