CVE-2022-30602
📋 TL;DR
This vulnerability allows authenticated remote attackers to bypass operation restrictions in Cybozu Garoon, enabling them to alter file information and delete files. It affects all users of Cybozu Garoon versions 4.0.0 through 5.9.1 who have authenticated access to the system.
💻 Affected Systems
- Cybozu Garoon
📦 What is this software?
Garoon by Cybozu
⚠️ Risk & Real-World Impact
Worst Case
Attackers could delete critical business files, modify sensitive information, or disrupt operations by manipulating file data, potentially causing data loss, compliance violations, or operational downtime.
Likely Case
Authenticated users with malicious intent could delete or modify files they shouldn't have access to, leading to data integrity issues and potential business disruption.
If Mitigated
With proper access controls and monitoring, impact would be limited to unauthorized file operations that could be detected and rolled back.
🎯 Exploit Status
Exploitation requires authenticated access but appears to be straightforward based on the vulnerability description.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 5.9.2
Vendor Advisory: https://cs.cybozu.co.jp/2022/007682.html
Restart Required: Yes
Instructions:
1. Backup your Garoon installation and database. 2. Download Garoon 5.9.2 or later from Cybozu. 3. Follow the official upgrade procedure. 4. Restart the Garoon service. 5. Verify the update was successful.
🔧 Temporary Workarounds
Restrict User Access
allTemporarily limit user permissions to only essential functions while awaiting patch deployment
🧯 If You Can't Patch
- Implement strict access controls and principle of least privilege for all Garoon users
- Enable detailed audit logging for all file operations and monitor for suspicious activity
🔍 How to Verify
Check if Vulnerable:
Check Garoon version in administration panel. If version is between 4.0.0 and 5.9.1 inclusive, system is vulnerable.Check Version:
Check via Garoon web interface: Administration > System Information > VersionVerify Fix Applied:
Verify Garoon version is 5.9.2 or higher in administration panel. Test file operations with non-admin users to ensure restrictions are enforced.📡 Detection & Monitoring
Log Indicators:
- Unexpected file deletion events
- File modification by non-administrative users
- Access to restricted file operations
Network Indicators:
- HTTP requests to file manipulation endpoints from unauthorized users
SIEM Query:
source="garoon_logs" AND (event_type="file_delete" OR event_type="file_modify") AND user_role!="admin"