CVE-2022-1616
📋 TL;DR
CVE-2022-1616 is a use-after-free vulnerability in Vim's append_command function that allows attackers to crash the application, bypass memory protections, modify memory, and potentially achieve remote code execution. This affects users running Vim versions prior to 8.2.4895. The vulnerability requires user interaction to open a malicious file or process untrusted input.
💻 Affected Systems
- Vim
📦 What is this software?
Fedora by Fedoraproject
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 →Vim by Vim
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise if Vim processes malicious content from untrusted sources.
Likely Case
Application crash or denial of service when processing specially crafted files or commands.
If Mitigated
Limited impact if Vim is only used with trusted files and proper privilege separation is implemented.
🎯 Exploit Status
Exploitation requires user interaction to open malicious files or process untrusted input. Proof-of-concept details are available in public disclosures.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 8.2.4895 and later
Vendor Advisory: https://github.com/vim/vim/commit/d88934406c5375d88f8f1b65331c9f0cab68cc6c
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 the official Vim repository.
🔧 Temporary Workarounds
Restrict file processing
allAvoid opening untrusted files with Vim and use alternative editors for suspicious content.
Use sandboxed environment
linuxRun Vim in a container or sandbox to limit potential damage from exploitation.
docker run --rm -it -v $(pwd):/data vim:latest
firejail vim
🧯 If You Can't Patch
- Implement strict file handling policies to prevent Vim from processing untrusted files
- Use alternative text editors for processing files from untrusted sources
🔍 How to Verify
Check if Vulnerable:
Run 'vim --version' and check if version is below 8.2.4895Check Version:
vim --version | head -1Verify Fix Applied:
Run 'vim --version' and confirm version is 8.2.4895 or higher📡 Detection & Monitoring
Log Indicators:
- Vim process crashes with segmentation faults
- Abnormal memory access patterns in system logs
Network Indicators:
- Unusual file transfers to systems running Vim
- Attempts to deliver malicious files to Vim users
SIEM Query:
process_name:vim AND (event_type:crash OR memory_violation:*)🔗 References
- http://seclists.org/fulldisclosure/2022/Oct/28
- http://seclists.org/fulldisclosure/2022/Oct/41
- https://github.com/vim/vim/commit/d88934406c5375d88f8f1b65331c9f0cab68cc6c
- https://huntr.dev/bounties/40f1d75f-fb2f-4281-b585-a41017f217e2
- https://lists.debian.org/debian-lts-announce/2022/05/msg00022.html
- https://lists.debian.org/debian-lts-announce/2022/11/msg00009.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/A6BY5P7ERZS7KXSBCGFCOXLMLGWUUJIH/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HIP7KG7TVS5YF3QREAY2GOGUT3YUBZAI/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JUN33257RUM4RS2I4GZETKFSAXPETATG/
- 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/d88934406c5375d88f8f1b65331c9f0cab68cc6c
- https://huntr.dev/bounties/40f1d75f-fb2f-4281-b585-a41017f217e2
- https://lists.debian.org/debian-lts-announce/2022/05/msg00022.html
- https://lists.debian.org/debian-lts-announce/2022/11/msg00009.html
- https://lists.debian.org/debian-lts-announce/2025/03/msg00023.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/A6BY5P7ERZS7KXSBCGFCOXLMLGWUUJIH/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HIP7KG7TVS5YF3QREAY2GOGUT3YUBZAI/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JUN33257RUM4RS2I4GZETKFSAXPETATG/
- https://security.gentoo.org/glsa/202208-32
- https://security.gentoo.org/glsa/202305-16
- https://support.apple.com/kb/HT213488
