CVE-2017-12950 in libgig
Summary
by MITRE
The gig::Region::Region function in gig.cpp in libgig 4.0.0 allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via a crafted gig file.
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Analysis
by VulDB Data Team • 12/10/2024
The vulnerability identified as CVE-2017-12950 resides within the libgig library version 4.0.0, specifically in the gig::Region::Region function located in the gig.cpp source file. This library serves as a crucial component for handling gig files, which are commonly used in audio sampling and synthesis applications. The flaw manifests when the library processes malformed or crafted gig files, creating a scenario where remote attackers can exploit this weakness to disrupt service availability. The vulnerability represents a classic null pointer dereference issue that occurs during the parsing of improperly structured audio file metadata, particularly within the region handling mechanisms of the library.
The technical execution of this vulnerability involves the gig::Region::Region function encountering a null pointer reference when processing specially crafted gig files that contain malformed region data structures. When the library attempts to access memory locations that have not been properly initialized or allocated, the application crashes due to the NULL pointer dereference. This behavior falls under CWE-476, which specifically addresses NULL pointer dereference conditions that can lead to application instability and denial of service scenarios. The vulnerability is particularly dangerous because it can be triggered remotely through the processing of malicious gig files, making it an attractive target for attackers seeking to disrupt audio applications that rely on libgig for file handling.
From an operational perspective, this vulnerability creates significant risk for audio software applications that utilize libgig for processing gig files, including digital audio workstations, sample libraries, and music production software. The remote exploitation capability means that attackers can cause service disruption without requiring physical access to the target system, making it particularly concerning for applications that automatically download or process external audio content. The resulting application crash can lead to complete service unavailability, forcing users to restart affected applications and potentially lose unsaved work. This type of vulnerability directly impacts the availability aspect of the CIA triad and can be classified under the ATT&CK technique T1499.004 for network denial of service attacks, as it specifically targets service availability through application-level crashes.
The mitigation strategy for CVE-2017-12950 primarily involves upgrading to a patched version of libgig that addresses the NULL pointer dereference issue in the gig::Region::Region function. System administrators and software vendors should prioritize updating their installations to versions that have been verified to contain the necessary fixes. Additionally, implementing proper input validation and sanitization measures can help reduce the attack surface by ensuring that malformed gig files are rejected before they reach the vulnerable parsing functions. Organizations should also consider implementing network segmentation and access controls to limit exposure to potentially malicious gig files, particularly in environments where automatic file processing occurs. The vulnerability demonstrates the importance of robust error handling in multimedia libraries and highlights the need for comprehensive testing of file parsing routines against malformed inputs to prevent similar issues in the future.