CVE-2025-29490
📋 TL;DR
A segmentation fault vulnerability in libming v0.4.8's decompileCALLMETHOD function allows attackers to cause Denial of Service (DoS) by processing a maliciously crafted SWF file. This affects any application or service that uses libming to parse SWF files, potentially crashing the process. Systems that process untrusted SWF files are at risk.
💻 Affected Systems
- libming
📦 What is this software?
Libming by Libming
⚠️ Risk & Real-World Impact
Worst Case
Complete service disruption where libming processes crash repeatedly, causing sustained DoS for applications relying on SWF file processing.
Likely Case
Intermittent crashes of applications using libming when processing malicious SWF files, leading to temporary service degradation.
If Mitigated
Minimal impact with proper input validation and sandboxing of SWF file processing.
🎯 Exploit Status
Exploitation requires the attacker to provide a crafted SWF file to a vulnerable libming instance. The PoC demonstrates reliable crash triggering.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check upstream libming repository for fixes
Vendor Advisory: https://github.com/libming/libming/issues/330
Restart Required: Yes
Instructions:
1. Monitor libming repository for patch release. 2. Update to patched version when available. 3. Restart affected services.
🔧 Temporary Workarounds
Input Validation for SWF Files
allImplement strict validation and sanitization of SWF files before processing with libming.
Process Isolation
allRun libming processing in isolated containers or sandboxes to limit crash impact.
🧯 If You Can't Patch
- Implement network segmentation to limit access to services using libming
- Deploy WAF rules to block malicious SWF file uploads
🔍 How to Verify
Check if Vulnerable:
Check libming version: ming-config --version or examine package manager outputCheck Version:
ming-config --version 2>/dev/null || dpkg -l | grep libming || rpm -qa | grep libmingVerify Fix Applied:
Verify updated version after patching and test with known malicious SWF files📡 Detection & Monitoring
Log Indicators:
- Segmentation fault errors in application logs
- Unexpected process termination of libming-related services
Network Indicators:
- Unusual SWF file upload patterns
- Repeated connection attempts to SWF processing endpoints
SIEM Query:
process.name:libming AND event.type:crash