CVE-2009-4553 in iRehearse
Summary
by MITRE
Stack-based buffer overflow in iRehearse allows remote attackers to cause a denial of service (application crash) or possibly have unspecified other impact via a long string in a .m3u playlist file.
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Analysis
by VulDB Data Team • 12/08/2024
The vulnerability identified as CVE-2009-4553 represents a critical stack-based buffer overflow flaw within the iRehearse media playback application. This vulnerability manifests when the application processes malformed .m3u playlist files containing excessively long string data, creating a dangerous condition that can be exploited by remote attackers to disrupt service availability or potentially execute arbitrary code. The issue stems from inadequate input validation mechanisms within the playlist parsing routine, specifically in how the application handles string length parameters during file processing operations. The buffer overflow occurs when user-supplied data exceeds the allocated stack memory space, leading to memory corruption that can result in application termination or unpredictable behavior.
The technical exploitation of this vulnerability follows a classic stack buffer overflow pattern that aligns with CWE-121, which describes stack-based buffer overflow conditions where insufficient bounds checking allows attackers to overwrite adjacent memory locations. When an attacker crafts a malicious .m3u file with an oversized string element, the iRehearse application fails to validate the input length before copying it into a fixed-size stack buffer. This flaw creates a predictable memory layout where the overflow can overwrite return addresses, function pointers, or other critical control data structures within the program's execution context. The vulnerability's remote nature means that attackers can exploit it without requiring local access, making it particularly dangerous in networked environments where media playback applications are commonly used.
The operational impact of CVE-2009-4553 extends beyond simple denial of service scenarios, as the buffer overflow condition can potentially enable more sophisticated attacks depending on the target system configuration and memory protection mechanisms. When the application crashes due to the overflow, it creates a denial of service condition that can disrupt legitimate user access to media content, particularly in environments where iRehearse serves as a core playback solution for presentations or educational materials. The unspecified other impacts mentioned in the vulnerability description suggest that under certain conditions, the memory corruption could potentially allow for code execution or privilege escalation, though this would depend on factors such as address space layout randomization, stack canaries, and other exploit mitigations present on the target system. This vulnerability particularly affects systems where iRehearse is deployed in enterprise or educational settings where users might receive playlist files from untrusted sources.
Mitigation strategies for this vulnerability should focus on immediate input validation and application hardening measures. The most effective approach involves implementing strict bounds checking on all user-supplied data within the playlist parsing routines, ensuring that string lengths are validated against maximum allowable values before any memory operations occur. Security patches should enforce maximum string length limits for .m3u playlist elements and implement proper error handling for malformed input data. Network administrators should consider implementing application whitelisting policies that restrict execution of vulnerable applications or deploy network-based intrusion prevention systems that can detect and block malicious playlist files. From a defensive perspective, this vulnerability demonstrates the importance of following secure coding practices and adhering to standards such as those outlined in the ATT&CK framework for application security, particularly in areas related to input validation and memory safety controls. Organizations should also consider implementing regular security assessments of media playback applications and maintaining up-to-date vulnerability management processes to identify and remediate similar issues in other software components.