CVE-2017-8869 in MediaCoder
Summary
by MITRE
Buffer overflow in MediaCoder 0.8.48.5888 allows remote attackers to execute arbitrary code via a crafted .m3u file.
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Analysis
by VulDB Data Team • 11/25/2019
The vulnerability identified as CVE-2017-8869 represents a critical buffer overflow flaw within MediaCoder version 0.8.48.5888 that exposes users to remote code execution risks. This issue stems from inadequate input validation mechanisms when processing specially crafted media playlist files with the .m3u extension. The buffer overflow occurs during the parsing of multimedia metadata within the playlist structure, creating opportunities for attackers to manipulate memory layout and potentially execute malicious code with the privileges of the affected application. The vulnerability demonstrates characteristics consistent with CWE-121, which describes heap-based buffer overflow conditions where insufficient bounds checking allows attackers to overwrite adjacent memory locations. This flaw specifically impacts the multimedia processing pipeline of MediaCoder, a popular open-source media conversion tool that handles various audio and video formats through its playlist management capabilities. The attack vector requires remote exploitation through the delivery of a malicious .m3u file, which when opened by the vulnerable application triggers the buffer overflow condition. The technical implementation of this vulnerability aligns with ATT&CK technique T1059.007, which covers command and scripting interpreter execution through the manipulation of application parsing routines. The flaw represents a classic stack-based overflow scenario where crafted input data exceeds the allocated buffer size, causing memory corruption that can be leveraged for privilege escalation. Attackers can exploit this vulnerability by crafting a malicious .m3u file containing oversized strings or specially formatted data that triggers the buffer overflow during parsing operations. The operational impact extends beyond simple code execution to include potential system compromise, data theft, and unauthorized access to network resources. This vulnerability affects users who process untrusted media playlists, particularly those who automatically open or preview .m3u files without proper security screening. The exploitation of CVE-2017-8869 aligns with common attack patterns described in the MITRE ATT&CK framework under the execution and privilege escalation domains. Organizations using MediaCoder versions prior to the patched release face significant risk exposure, as the vulnerability can be exploited through social engineering campaigns or automated delivery mechanisms targeting media processing applications. The buffer overflow condition creates a memory corruption state that allows attackers to redirect program execution flow, potentially leading to full system compromise. Security researchers have documented similar vulnerabilities in multimedia processing libraries where playlist parsing routines fail to validate input boundaries properly. The remediation approach for this vulnerability involves immediate software updates to patched versions of MediaCoder, along with network segmentation and input validation controls. Additionally, users should disable automatic playlist processing and implement strict file validation procedures for any media content received from untrusted sources. The vulnerability highlights the importance of proper bounds checking in multimedia applications and demonstrates how seemingly benign file format parsing can create critical security risks. Organizations should implement comprehensive vulnerability management programs that include regular security assessments of multimedia processing tools and their associated libraries to prevent similar issues from occurring in other software components.