CVE-2022-2345
📋 TL;DR
This CVE describes a Use After Free vulnerability in Vim text editor versions prior to 9.0.0046. Attackers can exploit this memory corruption flaw by tricking users into opening specially crafted files, potentially leading to arbitrary code execution. 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?
Fedora by Fedoraproject
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, data theft, or lateral movement within the network.
Likely Case
Application crash (denial of service) or limited code execution within the Vim process context, potentially allowing file system access or privilege escalation.
If Mitigated
No impact if proper patching is applied or if users avoid opening untrusted files with Vim.
🎯 Exploit Status
Exploitation requires user interaction (opening a malicious file). The vulnerability is well-documented with public proof-of-concept references available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 9.0.0046 and later
Vendor Advisory: https://github.com/vim/vim/commit/32acf1f1a72ebb9d8942b9c9d80023bf1bb668ea
Restart Required: No
Instructions:
1. Update Vim using your system's package manager (apt, yum, brew, etc.). 2. For source installations, download and compile Vim 9.0.0046 or later from the official repository.
🔧 Temporary Workarounds
Avoid opening untrusted files
allDo not use Vim to open files from untrusted sources or unknown origins.
Use alternative editors for untrusted files
allUse simpler text editors (like nano or notepad) for files from untrusted sources.
🧯 If You Can't Patch
- Restrict Vim usage to trusted users only through access controls.
- Implement application whitelisting to prevent execution of vulnerable Vim versions.
🔍 How to Verify
Check if Vulnerable:
Run 'vim --version' and check if the version is earlier than 9.0.0046.Check Version:
vim --version | head -1Verify Fix Applied:
After updating, run 'vim --version' to confirm version is 9.0.0046 or later.📡 Detection & Monitoring
Log Indicators:
- Vim process crashes with segmentation faults
- Unusual file access patterns from Vim processes
Network Indicators:
- File downloads followed by immediate Vim execution
SIEM Query:
process_name:vim AND (event_id:1000 OR signal:SIGSEGV)🔗 References
- https://github.com/vim/vim/commit/32acf1f1a72ebb9d8942b9c9d80023bf1bb668ea
- https://huntr.dev/bounties/1eed7009-db6d-487b-bc41-8f2fd260483f
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/43Y3VJPOTTY3NTREDIFUPITM2POG4ZLP/
- https://security.gentoo.org/glsa/202208-32
- https://security.gentoo.org/glsa/202305-16
- https://github.com/vim/vim/commit/32acf1f1a72ebb9d8942b9c9d80023bf1bb668ea
- https://huntr.dev/bounties/1eed7009-db6d-487b-bc41-8f2fd260483f
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/43Y3VJPOTTY3NTREDIFUPITM2POG4ZLP/
- https://security.gentoo.org/glsa/202208-32
- https://security.gentoo.org/glsa/202305-16
