CVE-2022-38600 in MPlayer
Summary
by MITRE • 09/15/2022
Mplayer SVN-r38374-13.0.1 is vulnerable to Memory Leak via vf.c and vf_vo.c.
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Analysis
by VulDB Data Team • 10/18/2022
The vulnerability identified as CVE-2022-38600 affects Mplayer SVN-r38374-13.0.1 and represents a memory leak condition that occurs within the video filtering components of the media player. This issue manifests specifically within the vf.c and vf_vo.c source files, which handle video filter operations and video output processing respectively. The memory leak vulnerability arises from improper memory management during the processing of video frames and filter operations, creating a situation where allocated memory blocks are not properly released back to the system. Such memory management failures can accumulate over time, leading to gradual resource exhaustion and potential system instability.
The technical flaw stems from inadequate memory deallocation practices in the video filter subsystem where temporary memory buffers are allocated to process video frames but are not consistently freed when no longer needed. This type of vulnerability falls under CWE-401, which specifically addresses improper release of memory resources, and represents a classic example of memory management error that can be exploited to degrade system performance or potentially enable more sophisticated attacks. The vulnerability is particularly concerning in multimedia applications where continuous processing of video content can exacerbate memory consumption issues, making it more likely for the leak to manifest as a denial of service condition.
From an operational impact perspective, this memory leak vulnerability can result in progressive performance degradation of the affected system as the application consumes increasing amounts of available memory over time. In practical scenarios, users may experience application slowdowns, system instability, or complete application crashes as memory resources become depleted. The vulnerability is particularly dangerous in environments where Mplayer is used continuously or in automated processing scenarios, as the memory leak can accumulate unnoticed until system resources are completely exhausted. This type of vulnerability aligns with ATT&CK technique T1499.001 which involves resource exhaustion attacks that can be achieved through memory leaks and other resource management issues.
The mitigation strategies for CVE-2022-38600 should prioritize immediate patching of the affected Mplayer version to the latest stable release that addresses the memory management issues in vf.c and vf_vo.c. System administrators should implement monitoring solutions to track memory usage patterns of Mplayer processes and establish alerting mechanisms for abnormal resource consumption. Additionally, implementing process isolation and resource limits can help contain the impact of memory leaks, while regular system maintenance and memory diagnostics should be conducted to identify and address any residual memory issues. Organizations should also consider implementing automated restart mechanisms for critical Mplayer processes to prevent prolonged memory exhaustion scenarios, as this vulnerability can potentially be exploited to create persistent denial of service conditions that impact legitimate system operations and user experience.