CVE-2024-28458
📋 TL;DR
A Null Pointer Dereference vulnerability in swfdump within swftools 0.9.2 allows attackers to crash the application by exploiting the compileSWFActionCode function. This affects users processing untrusted SWF files with swftools. The vulnerability can cause denial of service but does not appear to allow code execution.
💻 Affected Systems
- swftools
📦 What is this software?
Swftools by Swftools
⚠️ Risk & Real-World Impact
Worst Case
Application crash leading to denial of service for SWF processing functionality
Likely Case
Application crash when processing malicious SWF files
If Mitigated
No impact if application is not processing untrusted SWF files
🎯 Exploit Status
Proof of concept available on GitHub demonstrates crash via crafted SWF file
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch available. Consider workarounds or alternative tools.
🔧 Temporary Workarounds
Disable swfdump processing
linuxRemove or disable swfdump binary to prevent exploitation
sudo rm /usr/bin/swfdump
sudo chmod 000 /usr/bin/swfdump
Use alternative SWF tools
allReplace swftools with alternative SWF processing utilities
🧯 If You Can't Patch
- Restrict swfdump usage to trusted users only
- Implement input validation for SWF files before processing
🔍 How to Verify
Check if Vulnerable:
Check swftools version: swfdump -v or dpkg -l | grep swftoolsCheck Version:
swfdump -v 2>&1 | head -1Verify Fix Applied:
Test with known malicious SWF file from PoC repository📡 Detection & Monitoring
Log Indicators:
- Segmentation fault errors from swfdump process
- Unexpected swfdump process termination
Network Indicators:
- Uploads of SWF files to web applications
SIEM Query:
process_name:swfdump AND (event_type:crash OR exit_code:139)