CVE-2025-29494
📋 TL;DR
CVE-2025-29494 is a memory corruption vulnerability in libming v0.4.8's decompileGETMEMBER function that causes a segmentation fault when processing malicious SWF files. Attackers can exploit this to cause Denial of Service (DoS) by crashing applications using libming. This affects any system or application that uses libming to parse SWF files.
💻 Affected Systems
- libming
📦 What is this software?
Libming by Libming
⚠️ Risk & Real-World Impact
Worst Case
Complete service disruption through application crashes, potentially affecting availability of systems that process SWF files.
Likely Case
DoS through application crashes when processing malicious SWF files, requiring service restarts.
If Mitigated
Limited impact with proper input validation and sandboxing of SWF processing components.
🎯 Exploit Status
Proof of concept available in GitHub repository. Exploitation requires delivering a crafted SWF file to vulnerable systems.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check libming GitHub repository for latest version
Vendor Advisory: https://github.com/libming/libming/issues/330
Restart Required: Yes
Instructions:
1. Check current libming version. 2. Update to latest libming version from official repository. 3. Rebuild and reinstall applications using libming. 4. Restart affected services.
🔧 Temporary Workarounds
Disable SWF file processing
allPrevent libming from processing SWF files if not required
Configure applications to reject SWF file uploads
Disable SWF parsing features
Input validation and sanitization
allImplement strict validation of SWF files before processing
Add file type validation
Implement size limits
Use file signature verification
🧯 If You Can't Patch
- Implement network segmentation to isolate systems processing SWF files
- Deploy application-level firewalls to block malicious SWF file uploads
🔍 How to Verify
Check if Vulnerable:
Check if libming version is 0.4.8 using package manager or version commandCheck Version:
ming-config --version or check package manager (apt list libming, yum list libming, etc.)Verify Fix Applied:
Verify updated libming version and test with known safe SWF files📡 Detection & Monitoring
Log Indicators:
- Segmentation fault errors in application logs
- Unexpected process termination of SWF processing applications
- Core dumps from libming processes
Network Indicators:
- Unusual SWF file uploads to web applications
- Multiple failed SWF processing attempts
SIEM Query:
source="application.logs" AND ("segmentation fault" OR "SIGSEGV") AND process="*libming*"