CVE-2025-29486 in libming
Summary
by MITRE • 03/27/2025
libming v0.4.8 was discovered to contain a memory leak via the parseSWF_PLACEOBJECT3 function.
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Analysis
by VulDB Data Team • 09/12/2025
The vulnerability identified as CVE-2025-29486 affects libming version 0.4.8, a library used for generating and manipulating Shockwave Flash files. This memory leak occurs specifically within the parseSWF_PLACEOBJECT3 function, which is responsible for parsing PlaceObject3 tags in flash files. The flaw represents a classic resource management issue that can lead to progressive memory consumption over time, ultimately degrading system performance and potentially causing application crashes or system instability. The vulnerability impacts any application that relies on libming for processing flash content, particularly those handling multiple flash files or continuous processing workflows.
The technical implementation of this memory leak stems from improper memory allocation and deallocation patterns within the parseSWF_PLACEOBJECT3 function. When processing flash files containing PlaceObject3 tags, the library fails to properly release allocated memory blocks, causing memory fragments to accumulate in the heap. This type of vulnerability falls under CWE-401, which specifically addresses memory leaks in software applications. The flaw demonstrates poor memory management practices where allocated resources are not consistently freed, creating a condition where memory consumption grows linearly with the number of processed flash files or operations performed. The vulnerability is particularly concerning because PlaceObject3 tags are commonly found in complex flash files, making the memory leak more likely to occur during routine operations.
The operational impact of this vulnerability extends beyond simple performance degradation to potentially compromise system availability and stability. Applications utilizing libming for flash file processing may experience gradual memory exhaustion, leading to application crashes, system slowdowns, or complete system lockups when memory resources become depleted. This vulnerability is particularly dangerous in server environments where continuous processing of flash content occurs, as it can lead to denial of service conditions affecting multiple users or processes. The memory leak can also compound with other resource usage patterns, creating cascading effects that amplify the overall system impact. Additionally, the vulnerability may be exploited by attackers to perform resource exhaustion attacks, where malicious actors intentionally process numerous flash files to trigger memory depletion and disrupt service availability.
Mitigation strategies for CVE-2025-29486 should prioritize immediate patching of affected libming versions to address the memory leak in parseSWF_PLACEOBJECT3. System administrators should implement monitoring solutions to track memory usage patterns in applications relying on libming, enabling early detection of potential memory exhaustion conditions. Input validation and sanitization measures should be enhanced to limit the number of flash files processed in single sessions, reducing the likelihood of triggering the memory leak. Organizations should also consider implementing resource limits and process isolation to contain the impact should the vulnerability be exploited. The remediation approach aligns with ATT&CK technique T1499.004, which addresses resource exhaustion attacks, by implementing defensive measures that limit the impact of memory-related vulnerabilities. Regular security assessments and code reviews focusing on memory management practices should be conducted to prevent similar issues in future development cycles, ensuring that all resource allocation and deallocation operations follow proper protocols and are thoroughly tested for memory leak conditions.