CVE-2022-2207 – CVE-2022-2207 is a heap-based buffer overflow v... (How to Fix)

Q: What is the severity of CVE-2022-2207?

CVE-2022-2207 has a CVSS score of 7.8 (HIGH). CVE-2022-2207 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, particularly developers and system administrators.

📋 TL;DR

CVE-2022-2207 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, particularly developers and system administrators.

💻 Affected Systems

Products:

Vim text editor

Versions: All versions prior to 8.2

Operating Systems: Linux, Unix-like systems, Windows, macOS

Default Config Vulnerable: ⚠️ Yes

Notes: All standard Vim installations are vulnerable. The vulnerability is in core Vim functionality.

📦 What is this software?

⚠️ Risk & Real-World Impact

🔴

Worst Case

Remote code execution with the privileges of the Vim user, potentially leading to full system compromise if Vim is run with elevated privileges.

🟠

Likely Case

Local privilege escalation or arbitrary code execution when users open malicious files, potentially leading to data theft or lateral movement.

🟢

If Mitigated

Limited impact if Vim runs with minimal privileges and proper file validation is in place.

🌐 Internet-Facing: LOW - Vim is typically not exposed directly to the internet.

🏢 Internal Only: MEDIUM - Internal users could exploit this via malicious files, but requires user interaction.

🎯 Exploit Status

Public PoC: ⚠️ Yes

Weaponized: LIKELY

Unauthenticated Exploit: ✅ No

Complexity: MEDIUM

Exploitation requires user interaction (opening a malicious file). Proof-of-concept code is available in public repositories.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: Vim 8.2 and later

Vendor Advisory: https://github.com/vim/vim/commit/0971c7a4e537ea120a6bb2195960be8d0815e97b

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

Restrict file access

all

Limit Vim usage to trusted files only and avoid opening unknown files.

Use alternative editor

all

Temporarily use a different text editor until Vim is patched.

🧯 If You Can't Patch

Run Vim with minimal privileges (non-root user)
Implement application allowlisting to restrict Vim usage

🔍 How to Verify

Check if Vulnerable:

Run 'vim --version' and check if version is below 8.2. Also check if patch 0971c7a4e537ea120a6bb2195960be8d0815e97b is applied.

Check Version:

vim --version | head -1

Verify Fix Applied:

Run 'vim --version' and confirm version is 8.2 or higher. Check package manager for applied updates.

📡 Detection & Monitoring

Log Indicators:

Vim crash logs
Segmentation fault errors in system logs
Unusual process spawning from Vim

Network Indicators:

None - this is a local file-based exploit

SIEM Query:

Process creation where parent process is vim AND (command contains suspicious patterns OR destination is unusual)

📊 Metadata

CVE ID: CVE-2022-2207

CVSS v3 Score: 7.8 (HIGH)

CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CWE: CWE-122

Published: June 27, 2022

Last Updated: November 21, 2024

🔗 References

https://github.com/vim/vim/commit/0971c7a4e537ea120a6bb2195960be8d0815e97b Patch,Third Party Advisory
https://huntr.dev/bounties/05bc6051-4dc3-483b-ae56-cf23346b97b9 Exploit,Patch,Third Party Advisory
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 Third Party Advisory
https://security.gentoo.org/glsa/202305-16
https://github.com/vim/vim/commit/0971c7a4e537ea120a6bb2195960be8d0815e97b Patch,Third Party Advisory
https://huntr.dev/bounties/05bc6051-4dc3-483b-ae56-cf23346b97b9 Exploit,Patch,Third Party Advisory
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 Third Party Advisory
https://security.gentoo.org/glsa/202305-16

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🔗 Related Vulnerabilities

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