CVE-2022-29695
📋 TL;DR
CVE-2022-29695 is a memory leak vulnerability in Unicorn Engine v2.0.0-rc7 caused by incomplete initialization. This allows attackers to cause denial of service through resource exhaustion. Users of Unicorn Engine v2.0.0-rc7 are affected.
💻 Affected Systems
- Unicorn Engine
📦 What is this software?
Unicorn Engine by Unicorn Engine
Unicorn Engine by Unicorn Engine
Unicorn Engine by Unicorn Engine
Unicorn Engine by Unicorn Engine
Unicorn Engine by Unicorn Engine
Unicorn Engine by Unicorn Engine
Unicorn Engine by Unicorn Engine
Unicorn Engine by Unicorn Engine
⚠️ Risk & Real-World Impact
Worst Case
Complete system resource exhaustion leading to denial of service and potential system instability
Likely Case
Gradual memory consumption leading to performance degradation and eventual application crashes
If Mitigated
Minimal impact with proper monitoring and resource limits in place
🎯 Exploit Status
Exploitation requires triggering the vulnerable initialization code path
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Fixed in commit 5a79d7879ca3ee0ce684ad6576d8ac15e8d90fc7 and later versions
Vendor Advisory: https://github.com/unicorn-engine/unicorn/commit/5a79d7879ca3ee0ce684ad6576d8ac15e8d90fc7
Restart Required: Yes
Instructions:
1. Update Unicorn Engine to version after commit 5a79d7879ca3ee0ce684ad6576d8ac15e8d90fc7
2. Rebuild any applications using Unicorn Engine
3. Restart affected services
🔧 Temporary Workarounds
Limit memory usage
linuxImplement memory limits on processes using Unicorn Engine
ulimit -v [memory_limit_in_kb]
docker run --memory=[limit]
🧯 If You Can't Patch
- Implement application monitoring for memory leaks
- Schedule regular restarts of services using Unicorn Engine
🔍 How to Verify
Check if Vulnerable:
Check Unicorn Engine version: if using v2.0.0-rc7, you are vulnerableCheck Version:
Check build/version information in your application or libraryVerify Fix Applied:
Verify Unicorn Engine version is after commit 5a79d7879ca3ee0ce684ad6576d8ac15e8d90fc7📡 Detection & Monitoring
Log Indicators:
- Unusual memory growth patterns
- Application crashes with memory errors
Network Indicators:
- None - this is a local vulnerability
SIEM Query:
Process memory usage exceeding thresholds for applications using Unicorn Engine