CVE-2022-2522
📋 TL;DR
CVE-2022-2522 is a heap-based buffer overflow vulnerability in Vim text editor versions prior to 9.0.0061. Attackers can exploit this by tricking users into opening specially crafted files, potentially leading to arbitrary code execution. All users running vulnerable Vim versions are affected.
💻 Affected Systems
- Vim
📦 What is this software?
Vim by Vim
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution with the privileges of the Vim user, potentially leading to full system compromise.
Likely Case
Application crash (denial of service) or limited code execution within Vim's context.
If Mitigated
No impact if patched or if exploit attempts are blocked by security controls.
🎯 Exploit Status
Exploitation requires user interaction (opening a malicious file). Proof-of-concept code is available in public repositories.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 9.0.0061 and later
Vendor Advisory: https://github.com/vim/vim/commit/5fa9f23a63651a8abdb074b4fc2ec9b1adc6b089
Restart Required: No
Instructions:
1. Update Vim using your system's package manager (apt, yum, etc.). 2. For source installations, download and compile Vim 9.0.0061 or later from vim.org. 3. Verify the update with 'vim --version'.
🔧 Temporary Workarounds
Disable modeline processing
allPrevents Vim from executing malicious modeline commands in files.
Add 'set nomodeline' to your ~/.vimrc file
Use secure modeline restrictions
allRestricts modeline processing to safer subsets.
Add 'set modelines=0' to your ~/.vimrc file
🧯 If You Can't Patch
- Restrict Vim usage to trusted users only.
- Implement application whitelisting to block unauthorized Vim execution.
🔍 How to Verify
Check if Vulnerable:
Run 'vim --version' and check if version is below 9.0.0061.Check Version:
vim --version | head -1Verify Fix Applied:
Run 'vim --version' and confirm version is 9.0.0061 or higher.📡 Detection & Monitoring
Log Indicators:
- Vim crash logs
- Abnormal process termination of Vim
Network Indicators:
- Unusual file transfers to systems running Vim
SIEM Query:
Process:Name='vim' AND EventID=1000 (Windows) OR process.name='vim' AND signal='SIGSEGV' (Linux)🔗 References
- https://github.com/vim/vim/commit/5fa9f23a63651a8abdb074b4fc2ec9b1adc6b089
- https://github.com/vim/vim/commit/b9e717367c395490149495cf375911b5d9de889e
- https://huntr.dev/bounties/3a2d83af-9542-4d93-8784-98b115135a22
- https://huntr.dev/bounties/3a2d83af-9542-4d93-8784-98b115135a22/
- https://security.gentoo.org/glsa/202305-16
- https://github.com/vim/vim/commit/5fa9f23a63651a8abdb074b4fc2ec9b1adc6b089
- https://github.com/vim/vim/commit/b9e717367c395490149495cf375911b5d9de889e
- https://huntr.dev/bounties/3a2d83af-9542-4d93-8784-98b115135a22
- https://huntr.dev/bounties/3a2d83af-9542-4d93-8784-98b115135a22/
- https://security.gentoo.org/glsa/202305-16
