CVE-2017-12678 in TagLib
Summary
by MITRE
In TagLib 1.11.1, the rebuildAggregateFrames function in id3v2framefactory.cpp has a pointer to cast vulnerability, which allows remote attackers to cause a denial of service or possibly have unspecified other impact via a crafted audio file.
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Analysis
by VulDB Data Team • 12/15/2022
The vulnerability identified as CVE-2017-12678 represents a critical pointer casting issue within the TagLib library version 1.11.1 that affects the ID3v2 frame factory component. This flaw exists in the rebuildAggregateFrames function located within the id3v2framefactory.cpp source file, where improper pointer handling creates a potential attack surface for remote adversaries. The vulnerability manifests as a use-after-free condition that can be triggered through manipulation of ID3v2 metadata structures within audio files, making it particularly dangerous in environments where automated media processing occurs.
The technical nature of this vulnerability stems from inadequate input validation and memory management within the ID3v2 frame parsing logic. When the library processes specially crafted audio files containing malformed ID3v2 tags, the rebuildAggregateFrames function attempts to cast pointers without proper bounds checking or type verification. This pointer casting vulnerability falls under the CWE-467 category of "Use of sizeof() on a Pointer Type" and can be classified as a memory corruption issue that enables arbitrary code execution or denial of service conditions. The flaw operates at the intersection of buffer management and type safety, where the library fails to properly validate the integrity of metadata structures before attempting to process them.
From an operational perspective, this vulnerability creates significant risks for systems that rely on TagLib for audio file metadata processing, including media servers, content management systems, and digital asset management platforms. Attackers can exploit this weakness by crafting malicious audio files that, when processed by vulnerable applications, trigger the pointer casting error and cause system instability or complete application crashes. The remote nature of the attack means that systems processing user-uploaded content or streaming media are particularly vulnerable, as the malicious payload can be embedded within legitimate audio files without immediate detection. This vulnerability directly impacts the availability and reliability of media processing services, potentially allowing attackers to perform denial of service attacks against critical infrastructure.
The exploitation of CVE-2017-12678 aligns with several tactics outlined in the MITRE ATT&CK framework, particularly those related to resource exhaustion and execution of malicious code through file processing. The vulnerability can be leveraged in initial access scenarios where attackers upload malicious media files to web applications or content management systems that utilize TagLib for metadata extraction. Organizations should implement immediate mitigations including updating to TagLib version 1.12 or later, where this vulnerability has been addressed through improved pointer validation and memory management practices. Additionally, implementing strict input validation and sanitization of media files before processing, along with sandboxed execution environments for media handling, provides effective defense-in-depth strategies against this and similar vulnerabilities. The remediation process should also include comprehensive testing of all media processing pipelines to ensure that no other components are similarly affected by memory corruption issues that could enable privilege escalation or information disclosure attacks.