CVE-2022-29637
📋 TL;DR
CVE-2022-29637 is an arbitrary file upload vulnerability in Mindoc documentation software that allows attackers to upload malicious Zip files containing executable code. When exploited, this can lead to remote code execution on the server. All users running vulnerable versions of Mindoc are affected.
💻 Affected Systems
- Mindoc
📦 What is this software?
Mindoc by Iminho
⚠️ Risk & Real-World Impact
Worst Case
Complete server compromise allowing attackers to execute arbitrary commands, steal data, install backdoors, or pivot to other systems.
Likely Case
Remote code execution leading to data theft, website defacement, or cryptocurrency mining malware installation.
If Mitigated
Limited impact if proper file upload restrictions and web application firewalls are in place.
🎯 Exploit Status
Exploitation requires crafting a malicious Zip file with executable payload.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v2.1-beta.6 and later
Vendor Advisory: https://github.com/mindoc-org/mindoc/issues/788
Restart Required: Yes
Instructions:
1. Backup your Mindoc data and configuration. 2. Download the latest version from GitHub. 3. Replace the vulnerable files with patched version. 4. Restart the Mindoc service.
🔧 Temporary Workarounds
Restrict file upload extensions
allConfigure Mindoc to only allow specific safe file extensions for uploads
Edit Mindoc configuration to restrict uploads to .md, .txt, .pdf only
Implement WAF rules
allAdd web application firewall rules to block malicious file uploads
Add WAF rule: block requests with Content-Type containing 'zip' or 'application/zip' to upload endpoints
🧯 If You Can't Patch
- Disable file upload functionality entirely in Mindoc configuration
- Implement network segmentation to isolate Mindoc instances from critical systems
🔍 How to Verify
Check if Vulnerable:
Check Mindoc version in admin panel or by examining version files. If version is v2.1-beta.5 or earlier, you are vulnerable.Check Version:
Check Mindoc admin dashboard or examine version.txt in installation directoryVerify Fix Applied:
Verify version is v2.1-beta.6 or later. Test file upload functionality with safe files only.📡 Detection & Monitoring
Log Indicators:
- Unusual file uploads with .zip extensions
- Large number of failed upload attempts
- Suspicious POST requests to upload endpoints
Network Indicators:
- Unusual outbound connections from Mindoc server
- Traffic to known malicious IPs
SIEM Query:
source="mindoc.log" AND ("upload" AND ".zip") OR ("POST /upload")