CVE-2022-1451
📋 TL;DR
This vulnerability in radare2 allows attackers to read memory beyond intended buffer boundaries in the Java constant value attribute parsing function. It affects users of radare2 versions prior to 5.7.0, potentially exposing sensitive information or causing application crashes.
💻 Affected Systems
- radare2
📦 What is this software?
Radare2 by Radare
⚠️ Risk & Real-World Impact
Worst Case
Information disclosure of sensitive memory contents including passwords, keys, or other application data leading to complete system compromise.
Likely Case
Application crash (denial of service) or limited information disclosure from adjacent memory regions.
If Mitigated
Minimal impact if proper memory protections (ASLR, DEP) are enabled and the application runs with limited privileges.
🎯 Exploit Status
Exploitation requires local access or ability to feed malicious Java class files to radare2.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 5.7.0 and later
Vendor Advisory: https://github.com/radareorg/radare2/commit/0927ed3ae99444e7b47b84e43118deb10fe37529
Restart Required: No
Instructions:
1. Update radare2 to version 5.7.0 or later using your package manager. 2. For source installations: git pull from repository and rebuild. 3. Verify installation with 'r2 -v'.
🔧 Temporary Workarounds
Avoid parsing untrusted Java files
allRestrict radare2 from processing untrusted Java class files
Run with reduced privileges
linuxExecute radare2 with minimal permissions to limit impact
sudo -u nobody r2 [file]
🧯 If You Can't Patch
- Isolate radare2 usage to trusted environments only
- Implement strict file validation before feeding to radare2
🔍 How to Verify
Check if Vulnerable:
Run 'r2 -v' and check if version is below 5.7.0Check Version:
r2 -v | grep -o '\d\.\d\.\d'Verify Fix Applied:
Confirm version is 5.7.0 or higher with 'r2 -v'📡 Detection & Monitoring
Log Indicators:
- Segmentation fault crashes in radare2
- Abnormal memory access patterns
SIEM Query:
process_name:"r2" AND (event_type:"crash" OR exit_code:139)