CVE-2022-1899
📋 TL;DR
CVE-2022-1899 is an out-of-bounds read vulnerability in radare2, a popular reverse engineering framework. This vulnerability allows attackers to read memory beyond allocated buffers, potentially exposing sensitive information or causing crashes. Users of radare2 versions prior to 5.7.0 are affected.
💻 Affected Systems
- radare2
📦 What is this software?
Radare2 by Radare
⚠️ Risk & Real-World Impact
Worst Case
Information disclosure of sensitive memory contents, including credentials, cryptographic keys, or other application data, potentially leading to full system compromise if combined with other vulnerabilities.
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 user to open a malicious file with radare2. The vulnerability was discovered through bounty program with proof-of-concept available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 5.7.0 and later
Vendor Advisory: https://github.com/radareorg/radare2/commit/193f4fe01d7f626e2ea937450f2e0c4604420e9d
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
Restrict file analysis
allOnly analyze trusted files with radare2 until patched
Run with reduced privileges
linuxExecute radare2 with non-privileged user account to limit impact
sudo -u nonprivileged_user r2 file_to_analyze
🧯 If You Can't Patch
- Isolate radare2 usage to dedicated analysis VMs with no network access
- Implement strict file validation before analysis and monitor for crashes
🔍 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' and test with known malicious files if available📡 Detection & Monitoring
Log Indicators:
- Radare2 process crashes
- Segmentation faults in system logs
- Abnormal memory access patterns
Network Indicators:
- Typically none as this is local exploitation
SIEM Query:
process_name:"r2" AND (event_type:"crash" OR exit_code:139)