CVE-2022-0361
📋 TL;DR
CVE-2022-0361 is a heap-based buffer overflow vulnerability in Vim text editor versions prior to 8.2. This vulnerability allows attackers to execute arbitrary code by tricking users into opening specially crafted files. Anyone using vulnerable Vim versions is affected, particularly developers and system administrators who use Vim for editing files.
💻 Affected Systems
- Vim text editor
📦 What is this software?
Macos by Apple
macOS is Apple's desktop and laptop operating system powering Mac computers used by millions of professionals, developers, creative professionals, and enterprise users worldwide. Built on a Unix foundation with the Darwin kernel and modern Cocoa frameworks, macOS delivers a seamless ecosystem integr...
Learn more about Macos →Vim by Vim
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, data theft, or ransomware deployment.
Likely Case
Local privilege escalation or arbitrary code execution when users open malicious files.
If Mitigated
Limited impact if proper file validation and least privilege principles are followed.
🎯 Exploit Status
Exploitation requires user interaction to open a malicious file. Proof-of-concept code is available in public disclosures.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Vim 8.2 and later
Vendor Advisory: https://github.com/vim/vim/security/advisories/GHSA-8hxj-5wj3-9h9q
Restart Required: No
Instructions:
1. Update Vim using your system's package manager (apt-get update && apt-get upgrade vim, yum update vim, etc.) 2. Alternatively, compile from source using the patched version from GitHub 3. Verify the update with 'vim --version'
🔧 Temporary Workarounds
Disable modeline parsing
allPrevents Vim from executing malicious commands embedded in file headers
Add 'set nomodeline' to ~/.vimrc
Use securemodelines plugin
allAdds security restrictions to modeline parsing
Install from https://github.com/ciaranm/securemodelines
🧯 If You Can't Patch
- Restrict Vim usage to trusted files only and avoid opening unknown files
- Implement application whitelisting to prevent unauthorized Vim execution
🔍 How to Verify
Check if Vulnerable:
Run 'vim --version' and check if version is less than 8.2Check Version:
vim --version | head -1Verify Fix Applied:
Run 'vim --version' and confirm version is 8.2 or higher📡 Detection & Monitoring
Log Indicators:
- Segmentation fault or crash logs from Vim processes
- Unusual file access patterns from Vim
Network Indicators:
- Unusual outbound connections from systems running Vim
SIEM Query:
process_name:vim AND (event_type:crash OR exit_code:139)🔗 References
- http://seclists.org/fulldisclosure/2022/Oct/28
- http://seclists.org/fulldisclosure/2022/Oct/41
- http://seclists.org/fulldisclosure/2022/Oct/43
- https://github.com/vim/vim/commit/dc5490e2cbc8c16022a23b449b48c1bd0083f366
- https://huntr.dev/bounties/a055618c-0311-409c-a78a-99477121965b
- https://lists.debian.org/debian-lts-announce/2022/03/msg00018.html
- https://lists.debian.org/debian-lts-announce/2022/11/msg00009.html
- https://security.gentoo.org/glsa/202208-32
- https://support.apple.com/kb/HT213444
- https://support.apple.com/kb/HT213488
- http://seclists.org/fulldisclosure/2022/Oct/28
- http://seclists.org/fulldisclosure/2022/Oct/41
- http://seclists.org/fulldisclosure/2022/Oct/43
- https://github.com/vim/vim/commit/dc5490e2cbc8c16022a23b449b48c1bd0083f366
- https://huntr.dev/bounties/a055618c-0311-409c-a78a-99477121965b
- https://lists.debian.org/debian-lts-announce/2022/03/msg00018.html
- https://lists.debian.org/debian-lts-announce/2022/11/msg00009.html
- https://lists.debian.org/debian-lts-announce/2025/03/msg00023.html
- https://security.gentoo.org/glsa/202208-32
- https://support.apple.com/kb/HT213444
- https://support.apple.com/kb/HT213488
