CVE-2022-28068
📋 TL;DR
CVE-2022-28068 is a heap buffer overflow vulnerability in the r_sleb128 function of radare2, a popular reverse engineering framework. Attackers can exploit this by providing specially crafted input to cause memory corruption, potentially leading to arbitrary code execution or denial of service. Users of radare2 versions 5.4.0 and 5.4.2 are affected.
💻 Affected Systems
- radare2
📦 What is this software?
Radare2 by Radare
Radare2 by Radare
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution with the privileges of the radare2 process, potentially leading to complete system compromise if radare2 runs with elevated privileges.
Likely Case
Application crash (denial of service) or limited memory corruption leading to unstable behavior.
If Mitigated
Minimal impact if radare2 runs in sandboxed environments with limited privileges and no untrusted input processing.
🎯 Exploit Status
Exploitation requires crafting specific input to trigger the buffer overflow, but no public proof-of-concept has been documented.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 5.4.3 and later
Vendor Advisory: https://github.com/radareorg/radare2/commit/637f4bd1af6752e28e0a9998e954e2e9ce6fa992
Restart Required: No
Instructions:
1. Update radare2 to version 5.4.3 or later using your package manager. 2. For manual installation: git clone https://github.com/radareorg/radare2 && cd radare2 && sys/install.sh
🔧 Temporary Workarounds
Restrict file processing
allLimit radare2 to processing only trusted files from verified sources.
Run with reduced privileges
linuxExecute radare2 with minimal user privileges to limit potential damage from exploitation.
sudo -u lowprivilegeuser r2 target_file
🧯 If You Can't Patch
- Isolate radare2 usage to dedicated systems with no network access
- Implement strict input validation for all files processed by radare2
🔍 How to Verify
Check if Vulnerable:
Check radare2 version with 'r2 -v' and verify if it's 5.4.0 or 5.4.2Check Version:
r2 -v | grep -o '\d\.\d\.\d'Verify Fix Applied:
After updating, confirm version is 5.4.3 or later with 'r2 -v'📡 Detection & Monitoring
Log Indicators:
- Segmentation fault or crash logs from radare2 processes
- Abnormal memory usage patterns in system logs
Network Indicators:
- Unusual outbound connections from systems running radare2
SIEM Query:
process_name:"r2" AND (event_type:"crash" OR memory_usage:>threshold)