CVE-2022-0676 – This CVE describes a heap-based buffer overflow... (How to Fix)

Q: What is the severity of CVE-2022-0676?

CVE-2022-0676 has a CVSS score of 7.8 (HIGH). This CVE describes a heap-based buffer overflow vulnerability in 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. Users running radare2 versions prior to 5.6.4 are affected.

📋 TL;DR

This CVE describes a heap-based buffer overflow vulnerability in 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. Users running radare2 versions prior to 5.6.4 are affected.

💻 Affected Systems

Products:

radare2

Versions: All versions prior to 5.6.4

Operating Systems: Linux, Windows, macOS, BSD

Default Config Vulnerable: ⚠️ Yes

Notes: Vulnerability exists in core parsing functionality, so most configurations are affected when processing untrusted input.

📦 What is this software?

⚠️ Risk & Real-World Impact

🔴

Worst Case

Remote code execution with the privileges of the radare2 process, potentially leading to full system compromise if radare2 runs with elevated privileges.

🟠

Likely Case

Application crash (denial of service) or limited memory corruption leading to information disclosure.

🟢

If Mitigated

Minimal impact if radare2 runs in sandboxed environments with limited privileges and input validation.

🌐 Internet-Facing: LOW - radare2 is typically used as a local analysis tool, not exposed to internet.

🏢 Internal Only: MEDIUM - Could be exploited through malicious files analyzed internally or in shared environments.

🎯 Exploit Status

Public PoC: ⚠️ Yes

Weaponized: LIKELY

Unauthenticated Exploit: ⚠️ Yes

Complexity: MEDIUM

Exploit requires crafting specific input files, but public details exist in the huntr.dev bounty report.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: 5.6.4 and later

Vendor Advisory: https://github.com/radareorg/radare2/commit/c84b7232626badd075caf3ae29661b609164bac6

Restart Required: No

Instructions:

1. Update radare2 to version 5.6.4 or later using your package manager. 2. For source installations: git pull from repository and rebuild. 3. Verify installation with 'r2 -v'.

🔧 Temporary Workarounds

Input validation and sandboxing

linux

Run radare2 with reduced privileges and only analyze trusted files

sudo -u nobody r2 [file]
firejail --net=none r2 [file]

🧯 If You Can't Patch

Restrict radare2 usage to trusted users and environments only
Implement strict file validation before processing with radare2

🔍 How to Verify

Check if Vulnerable:

Run 'r2 -v' and check if version is below 5.6.4

Check Version:

r2 -v | grep -o '\d\.\d\.\d'

Verify Fix Applied:

Confirm version is 5.6.4 or higher with 'r2 -v'

📡 Detection & Monitoring

Log Indicators:

Segmentation fault or crash logs from radare2 process
Abnormal memory usage patterns

Network Indicators:

Not applicable - local tool

SIEM Query:

process_name:"r2" AND (event_type:"crash" OR exit_code:139)

📊 Metadata

CVE ID: CVE-2022-0676

CVSS v3 Score: 7.8 (HIGH)

CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CWE: CWE-122

Published: February 22, 2022

Last Updated: November 21, 2024

🔗 References

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