CVE-2017-12951 in libgig
Summary
by MITRE
The gig::DimensionRegion::CreateVelocityTable function in gig.cpp in libgig 4.0.0 allows remote attackers to cause a denial of service (stack-based buffer over-read 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-2017-12951 resides within the libgig library version 4.0.0, specifically in the gig::DimensionRegion::CreateVelocityTable function located in the gig.cpp source file. This flaw represents a classic stack-based buffer over-read condition that can be exploited by remote attackers through the manipulation of crafted gig files. The libgig library serves as a critical component in audio software ecosystems, particularly for handling gigabyte-sized audio sample files used in virtual instruments and music production applications. When a maliciously constructed gig file is processed by software utilizing this library, the vulnerable function fails to properly validate input boundaries, leading to memory access violations that manifest as application crashes and denial of service conditions.
The technical implementation of this vulnerability stems from inadequate bounds checking within the CreateVelocityTable function, which is responsible for generating velocity tables for audio dimension regions in gig files. When the function processes malformed input data from a crafted gig file, it attempts to read beyond the allocated stack buffer boundaries, causing a buffer over-read condition that results in undefined behavior. This type of vulnerability falls under the CWE-121 category of stack-based buffer overflow, though the specific manifestation here involves over-read rather than overwrite operations. The flaw demonstrates a fundamental weakness in input validation and memory management practices, where the software assumes proper input format without adequate verification mechanisms. The attack vector is particularly concerning as it operates entirely through file-based manipulation, requiring no interactive user input beyond the simple act of opening or processing the malicious file.
The operational impact of CVE-2017-12951 extends beyond simple application instability to encompass broader system availability and reliability concerns within audio production environments. When exploited, this vulnerability can cause cascading failures in music production software, digital audio workstations, and virtual instrument plugins that depend on libgig for sample file processing. The denial of service condition affects not only the immediate application but can potentially disrupt entire creative workflows, particularly in professional environments where audio software stability is paramount. Attackers can leverage this vulnerability to disrupt legitimate users' ability to access audio content, create unauthorized service interruptions, or potentially escalate the attack through chained vulnerabilities in the broader software ecosystem. The vulnerability's remote exploitability means that malicious actors can deliver payloads through various channels including email attachments, web downloads, or file sharing platforms without requiring physical access to target systems.
Mitigation strategies for this vulnerability require immediate software updates to libgig version 4.1.0 or later, which contains the necessary patches to address the buffer over-read condition. System administrators should prioritize patch management across all affected software applications that utilize libgig, particularly in professional audio environments where the library is commonly deployed. Additional defensive measures include implementing strict file validation procedures, deploying sandboxing techniques for gig file processing, and establishing network-level controls to prevent unauthorized file execution. Organizations should also consider implementing application whitelisting policies and regular security assessments to identify potential exploitation vectors. From a security framework perspective, this vulnerability aligns with ATT&CK technique T1203 (Exploitation for Client Execution) and demonstrates the importance of input validation controls as outlined in the OWASP Top Ten. The remediation process should include comprehensive testing to ensure that the patched version properly handles all edge cases in gig file parsing while maintaining compatibility with legitimate use cases. Regular security monitoring and incident response procedures should be established to detect potential exploitation attempts and maintain system integrity in environments where audio software is extensively used.