CVE-2022-1968
📋 TL;DR
CVE-2022-1968 is a use-after-free vulnerability in Vim text editor versions prior to 8.2. This 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.
💻 Affected Systems
- Vim
📦 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 with the privileges of the Vim user, potentially leading to full system compromise.
Likely Case
Local privilege escalation or arbitrary code execution when users open malicious files.
If Mitigated
Limited impact if users only open trusted files and Vim runs with minimal privileges.
🎯 Exploit Status
Exploitation requires user interaction to open a malicious file. Proof-of-concept code is publicly available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 8.2 and later
Vendor Advisory: https://github.com/vim/vim/commit/409510c588b1eec1ae33511ae97a21eb8e110895
Restart Required: No
Instructions:
1. Update Vim to version 8.2 or later using your package manager. 2. For Debian/Ubuntu: sudo apt update && sudo apt upgrade vim. 3. For RHEL/CentOS: sudo yum update vim. 4. For macOS: brew upgrade vim. 5. For Windows: Download latest installer from vim.org.
🔧 Temporary Workarounds
Restrict file access
allLimit Vim to opening only trusted files from known sources.
Use alternative editor
allTemporarily use a different text editor until Vim is patched.
🧯 If You Can't Patch
- Run Vim with reduced privileges using sandboxing or containerization
- Implement strict file integrity monitoring for Vim configuration and script files
🔍 How to Verify
Check if Vulnerable:
Check Vim version with 'vim --version' and verify it's below 8.2.Check Version:
vim --version | head -1Verify Fix Applied:
After update, run 'vim --version' and confirm version is 8.2 or higher.📡 Detection & Monitoring
Log Indicators:
- Unusual Vim process crashes
- Suspicious file access patterns in Vim
Network Indicators:
- None - this is a local vulnerability
SIEM Query:
Process creation where parent process is vim AND command line contains unusual arguments🔗 References
- http://seclists.org/fulldisclosure/2022/Oct/28
- http://seclists.org/fulldisclosure/2022/Oct/41
- https://github.com/vim/vim/commit/409510c588b1eec1ae33511ae97a21eb8e110895
- https://huntr.dev/bounties/949090e5-f4ea-4edf-bd79-cd98f0498a5b
- https://lists.debian.org/debian-lts-announce/2022/06/msg00014.html
- https://lists.debian.org/debian-lts-announce/2022/11/msg00009.html
- https://security.gentoo.org/glsa/202208-32
- https://security.gentoo.org/glsa/202305-16
- https://support.apple.com/kb/HT213488
- http://seclists.org/fulldisclosure/2022/Oct/28
- http://seclists.org/fulldisclosure/2022/Oct/41
- https://github.com/vim/vim/commit/409510c588b1eec1ae33511ae97a21eb8e110895
- https://huntr.dev/bounties/949090e5-f4ea-4edf-bd79-cd98f0498a5b
- https://lists.debian.org/debian-lts-announce/2022/06/msg00014.html
- https://lists.debian.org/debian-lts-announce/2022/11/msg00009.html
- https://security.gentoo.org/glsa/202208-32
- https://security.gentoo.org/glsa/202305-16
- https://support.apple.com/kb/HT213488
