CVE-2022-2125
📋 TL;DR
CVE-2022-2125 is a heap-based buffer overflow 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.
💻 Affected Systems
- Vim
📦 What is this software?
Fedora by Fedoraproject
Fedora by Fedoraproject
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 →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 proper file validation and least privilege principles are followed.
🎯 Exploit Status
Exploitation requires user interaction (opening a malicious file). Proof-of-concept code is available in public disclosures.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 8.2 and later
Vendor Advisory: https://github.com/vim/vim/commit/0e8e938d497260dd57be67b4966cb27a5f72376f
Restart Required: No
Instructions:
1. Update Vim using your system's package manager. 2. For Linux: 'sudo apt update && sudo apt upgrade vim' (Debian/Ubuntu) or 'sudo yum update vim' (RHEL/CentOS). 3. For Windows/macOS: Download latest version from vim.org. 4. Verify version with 'vim --version'.
🔧 Temporary Workarounds
Disable modeline parsing
allPrevents Vim from executing malicious commands embedded in file headers
Add 'set nomodeline' to ~/.vimrc
Restrict file access
allLimit Vim usage to trusted files only
🧯 If You Can't Patch
- Implement application allowlisting to restrict Vim execution
- Use alternative text editors for untrusted files
🔍 How to Verify
Check if Vulnerable:
Run 'vim --version' and check if version is below 8.2Check Version:
vim --version | head -1Verify Fix Applied:
Run 'vim --version' and confirm version is 8.2 or higher📡 Detection & Monitoring
Log Indicators:
- Unusual process spawns from Vim
- Segmentation faults in Vim processes
Network Indicators:
- None (local exploitation only)
SIEM Query:
Process creation where parent process contains 'vim' and child process is suspicious🔗 References
- http://seclists.org/fulldisclosure/2022/Oct/28
- http://seclists.org/fulldisclosure/2022/Oct/41
- http://seclists.org/fulldisclosure/2022/Oct/43
- http://seclists.org/fulldisclosure/2022/Oct/45
- https://github.com/vim/vim/commit/0e8e938d497260dd57be67b4966cb27a5f72376f
- https://huntr.dev/bounties/17dab24d-beec-464d-9a72-5b6b11283705
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GFD2A4YLBR7OIRHTL7CK6YNMEIQ264CN/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U743FMJGFQ35GBPCQ6OWMVZEJPDFVEWM/
- https://security.gentoo.org/glsa/202208-32
- https://security.gentoo.org/glsa/202305-16
- https://support.apple.com/kb/HT213443
- 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
- http://seclists.org/fulldisclosure/2022/Oct/45
- https://github.com/vim/vim/commit/0e8e938d497260dd57be67b4966cb27a5f72376f
- https://huntr.dev/bounties/17dab24d-beec-464d-9a72-5b6b11283705
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GFD2A4YLBR7OIRHTL7CK6YNMEIQ264CN/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U743FMJGFQ35GBPCQ6OWMVZEJPDFVEWM/
- https://security.gentoo.org/glsa/202208-32
- https://security.gentoo.org/glsa/202305-16
- https://support.apple.com/kb/HT213443
- https://support.apple.com/kb/HT213444
- https://support.apple.com/kb/HT213488
