CVE-2013-4234 in libmodplug
Summary
by MITRE
Multiple heap-based buffer overflows in the (1) abc_MIDI_drum and (2) abc_MIDI_gchord functions in load_abc.cpp in libmodplug 0.8.8.4 and earlier allow remote attackers to cause a denial of service (memory corruption and crash) and possibly execute arbitrary code via a crafted ABC.
If you want to get best quality of vulnerability data, you may have to visit VulDB.
Analysis
by VulDB Data Team • 01/07/2022
The vulnerability identified as CVE-2013-4234 represents a critical heap-based buffer overflow issue affecting libmodplug version 0.8.8.4 and earlier. This security flaw exists within the load_abc.cpp source file and specifically impacts two distinct functions: abc_MIDI_drum and abc_MIDI_gchord. The vulnerability arises from improper input validation and memory management when processing crafted ABC format data, which is a musical notation format used for representing musical scores in text form. The affected library serves as a core component in various multimedia applications and music players that support the ABC format for audio playback and conversion.
The technical implementation of this vulnerability stems from insufficient bounds checking in the memory allocation and data processing routines within the two identified functions. When libmodplug attempts to parse maliciously crafted ABC data, the abc_MIDI_drum and abc_MIDI_gchord functions fail to properly validate the size of incoming data buffers, leading to heap memory corruption. This flaw operates under CWE-122 which categorizes heap-based buffer overflows as a fundamental memory safety issue, where the program writes beyond the allocated buffer boundaries. The vulnerability manifests when the application processes malformed ABC musical notation data that triggers the buffer overflow conditions during parsing operations, potentially causing memory corruption that leads to application instability.
From an operational perspective, this vulnerability presents significant risks to systems utilizing libmodplug for audio processing or music file conversion. Remote attackers can exploit this weakness by providing specially crafted ABC files that trigger the buffer overflow conditions in the affected functions. The impact ranges from denial of service conditions where applications crash due to memory corruption to potential arbitrary code execution scenarios, depending on the specific memory layout and exploitation circumstances. The vulnerability affects not only individual applications but also entire software ecosystems that depend on libmodplug as a library component, potentially compromising the security of multimedia applications, music players, and audio processing systems. This represents a classic example of how input validation failures in multimedia libraries can create widespread security implications across multiple software implementations.
Mitigation strategies for CVE-2013-4234 require immediate software updates to libmodplug versions 0.8.8.5 and later, which contain the necessary patches addressing the buffer overflow conditions. System administrators should prioritize patching affected applications that utilize libmodplug, particularly those handling user-provided musical data or files from untrusted sources. Additionally, implementing input validation measures and sandboxing techniques can provide additional defense layers against exploitation attempts. Security monitoring should include detection of malformed ABC files and unusual memory allocation patterns that might indicate exploitation attempts. Organizations should also consider implementing application whitelisting and access controls to limit the potential impact of successful exploitation. The vulnerability aligns with ATT&CK technique T1203 which involves the exploitation of memory corruption vulnerabilities, and represents a critical security concern for multimedia applications that process external data files.