CVE-2022-38866 in MPlayer
Summary
by MITRE • 09/15/2022
Certain The MPlayer Project products are vulnerable to Buffer Overflow via read_avi_header() of libmpdemux/aviheader.c . This affects mplayer SVN-r38374-13.0.1 and mencoder SVN-r38374-13.0.1.
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Analysis
by VulDB Data Team • 10/18/2022
The vulnerability identified as CVE-2022-38866 represents a critical buffer overflow condition within The MPlayer Project media playback software suite, specifically affecting mplayer and mencoder applications. This flaw exists in the read_avi_header() function located within the libmpdemux/aviheader.c source file, which processes AVI container format files during media decoding operations. The vulnerability manifests when the software attempts to parse malformed or specially crafted AVI headers, creating an opportunity for attackers to execute arbitrary code or cause application crashes through memory corruption.
The technical implementation of this buffer overflow stems from inadequate input validation and bounds checking within the AVI header parsing routine. When processing AVI files, the read_avi_header() function fails to properly validate the size parameters of various header structures, allowing maliciously formatted data to overwrite adjacent memory regions. This condition aligns with CWE-121, which describes stack-based buffer overflow vulnerabilities, and represents a classic example of insufficient boundary checking in memory management operations. The vulnerability is particularly concerning because it affects the core media parsing functionality that handles user-supplied content, making it susceptible to exploitation through malicious media files.
The operational impact of this vulnerability extends beyond simple application crashes, as it provides potential attackers with pathways for remote code execution within the context of the affected applications. When an unsuspecting user opens a specially crafted AVI file, the buffer overflow can be triggered, potentially allowing attackers to execute arbitrary code with the privileges of the running process. This risk is exacerbated by the widespread use of MPlayer and its components in various operating systems and media applications, creating a broad attack surface. The vulnerability affects specific versions including mplayer SVN-r38374-13.0.1 and mencoder SVN-r38374-13.0.1, indicating that the issue persists in relatively recent codebases and suggests potential exploitation in environments where these applications are deployed.
Mitigation strategies for CVE-2022-38866 should prioritize immediate patching of affected software versions to address the buffer overflow condition in the AVI header parsing routine. System administrators should implement strict file validation controls and restrict user access to media file processing capabilities where possible. Network-level defenses including content filtering and sandboxing mechanisms can provide additional protection layers against exploitation attempts. The vulnerability demonstrates the importance of input validation and memory safety practices in multimedia processing software, aligning with ATT&CK technique T1203 for exploitation through malicious media files. Organizations should also consider implementing automated vulnerability scanning tools to detect potentially affected installations and ensure comprehensive coverage of all system components that may utilize the vulnerable MPlayer libraries.