CVE-2025-29488 in libming
Summary
by MITRE • 03/27/2025
libming v0.4.8 was discovered to contain a memory leak via the parseSWF_INITACTION function.
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Analysis
by VulDB Data Team • 09/12/2025
The vulnerability identified as CVE-2025-29488 affects libming version 0.4.8, a library used for parsing and generating SWF (Shockwave Flash) files. This memory leak occurs within the parseSWF_INITACTION function, which is responsible for processing initialization actions within SWF files. The flaw represents a classic memory management issue that can lead to resource exhaustion over time, particularly when the library processes multiple or large SWF files. The vulnerability is particularly concerning as it affects a widely used library in multimedia and web content processing applications.
The technical implementation of this memory leak stems from improper memory deallocation within the parseSWF_INITACTION function. When processing SWF files containing initialization actions, the function allocates memory for various data structures but fails to properly release this memory in all code execution paths. This can occur when the function encounters certain malformed or complex SWF structures that trigger alternative code branches where memory cleanup routines are not executed. The issue demonstrates poor memory management practices and violates fundamental security principles regarding resource handling. According to CWE standards, this vulnerability maps to CWE-401: Improper Release of Memory Before Removing Last Reference, which specifically addresses memory leaks in software implementations.
The operational impact of this vulnerability extends beyond simple resource consumption issues. When applications utilizing libming process multiple SWF files or when the library is exposed to malicious SWF content, the memory leak can progressively consume system resources until the application becomes unresponsive or crashes. This creates potential denial of service conditions that can affect web applications, content management systems, and multimedia processing tools that rely on SWF file parsing capabilities. Attackers could potentially exploit this vulnerability by crafting SWF files designed to trigger the memory leak under specific conditions, leading to service disruption or system instability. The vulnerability is particularly relevant in environments where SWF files are frequently processed, such as web browsers, content delivery networks, and multimedia servers.
Mitigation strategies for this vulnerability should begin with immediate patching of libming to version 0.4.9 or later, which contains the necessary memory management fixes. System administrators should also implement monitoring for abnormal memory usage patterns in applications utilizing this library, as early detection can prevent complete service disruption. Additionally, input validation and sanitization measures should be strengthened to limit the exposure to malformed SWF files. Organizations should consider implementing sandboxing techniques for SWF file processing and establishing memory limits for applications that handle multimedia content. The vulnerability highlights the importance of regular security updates and proper memory management practices in software development, aligning with ATT&CK tactics that emphasize privilege escalation and resource exhaustion through memory manipulation techniques.