CVE-2022-1031
📋 TL;DR
This is a use-after-free vulnerability in the op_is_set_bp function of radare2, a reverse engineering framework. Attackers could exploit this to execute arbitrary code or cause denial of service by manipulating memory after it has been freed. Users of radare2 versions prior to 5.6.6 are affected.
💻 Affected Systems
- radare2
📦 What is this software?
Radare2 by Radare
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution with the privileges of the radare2 process, potentially leading to full system compromise.
Likely Case
Application crash (denial of service) or limited memory corruption leading to unstable behavior.
If Mitigated
No impact if patched or if exploit attempts are blocked by security controls.
🎯 Exploit Status
Exploitation requires crafting malicious input that triggers the use-after-free condition; no public exploit code has been disclosed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 5.6.6 and later
Vendor Advisory: https://github.com/radareorg/radare2/commit/a7ce29647fcb38386d7439696375e16e093d6acb
Restart Required: Yes
Instructions:
1. Update radare2 to version 5.6.6 or later using your package manager (e.g., 'sudo apt update && sudo apt upgrade radare2' on Debian/Ubuntu). 2. Alternatively, compile from source: 'git clone https://github.com/radareorg/radare2', 'cd radare2', 'git checkout 5.6.6', './sys/install.sh'. 3. Restart any running radare2 processes.
🔧 Temporary Workarounds
Avoid untrusted inputs
allDo not use radare2 to analyze untrusted or malicious files until patched.
🧯 If You Can't Patch
- Restrict radare2 usage to trusted, isolated environments only.
- Implement application whitelisting to prevent execution of vulnerable radare2 binaries.
🔍 How to Verify
Check if Vulnerable:
Run 'r2 -v' and check if version is below 5.6.6.Check Version:
r2 -vVerify Fix Applied:
After updating, run 'r2 -v' to confirm version is 5.6.6 or higher.📡 Detection & Monitoring
Log Indicators:
- Segmentation fault or crash logs from radare2 processes
- Unexpected memory access errors in system logs
Network Indicators:
- None - this is a local vulnerability
SIEM Query:
Process execution where name contains 'radare2' or 'r2' AND version < 5.6.6