CVE-2022-21821
📋 TL;DR
CVE-2022-21821 is an integer overflow vulnerability in NVIDIA's CUDA Toolkit SDK cuobjdump utility. It allows remote code execution when a user processes a specially crafted corrupted file with cuobjdump, potentially leading to denial of service and data compromise. This affects users who run cuobjdump on untrusted files.
💻 Affected Systems
- NVIDIA CUDA Toolkit SDK
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise via remote code execution, leading to data theft, system destruction, and persistent backdoor installation.
Likely Case
Local privilege escalation or denial of service affecting the cuobjdump process and potentially the host system.
If Mitigated
Limited impact if cuobjdump is not used or runs with minimal privileges on trusted files only.
🎯 Exploit Status
Exploitation requires user to download and execute cuobjdump on a malicious file. No public exploit code is known, but the vulnerability is documented.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: CUDA Toolkit 11.6 Update 2 or later
Vendor Advisory: https://nvidia.custhelp.com/app/answers/detail/a_id/5334
Restart Required: No
Instructions:
1. Download CUDA Toolkit 11.6 Update 2 or newer from NVIDIA's website. 2. Install the update, replacing the vulnerable cuobjdump binary. 3. Verify the version with 'cuobjdump --version'.
🔧 Temporary Workarounds
Restrict cuobjdump usage
allLimit execution of cuobjdump to trusted users and files only.
chmod 750 /usr/local/cuda/bin/cuobjdump (Linux)
Set restrictive ACLs on cuobjdump.exe (Windows)
Remove or rename cuobjdump
allTemporarily disable cuobjdump if not needed.
sudo mv /usr/local/cuda/bin/cuobjdump /usr/local/cuda/bin/cuobjdump.disabled
rename cuobjdump.exe cuobjdump.disabled.exe (Windows)
🧯 If You Can't Patch
- Implement strict file integrity monitoring on cuobjdump binary and alert on execution.
- Use application whitelisting to block cuobjdump execution except from approved paths.
🔍 How to Verify
Check if Vulnerable:
Run 'cuobjdump --version' and check if version is prior to 11.6 Update 2.Check Version:
cuobjdump --versionVerify Fix Applied:
Confirm cuobjdump version is 11.6 Update 2 or later with 'cuobjdump --version'.📡 Detection & Monitoring
Log Indicators:
- Unexpected process crashes of cuobjdump
- Execution of cuobjdump with unusual file arguments
Network Indicators:
- None directly; focus on file download and local execution patterns
SIEM Query:
Process creation where image ends with 'cuobjdump' and command line contains unusual file extensions or paths.