CVE-2022-1993
📋 TL;DR
CVE-2022-1993 is a path traversal vulnerability in Gogs (Go Git Service) that allows attackers to read arbitrary files on the server by manipulating file paths. This affects all Gogs installations prior to version 0.12.9. The vulnerability can be exploited by authenticated users with repository access.
💻 Affected Systems
- Gogs (Go Git Service)
📦 What is this software?
Gogs by Gogs
⚠️ Risk & Real-World Impact
Worst Case
Attackers could read sensitive system files including configuration files, SSH keys, database credentials, and source code, potentially leading to complete system compromise.
Likely Case
Unauthorized access to repository files, configuration data, and potentially sensitive user information stored in accessible directories.
If Mitigated
Limited to reading files within the Gogs installation directory if proper file permissions and access controls are implemented.
🎯 Exploit Status
Exploit requires authenticated access. Proof of concept available in public repositories and bounty reports.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 0.12.9 and later
Vendor Advisory: https://github.com/gogs/gogs/commit/9bf748b6c4c9a17d3aa77f6b9abcfae65451febf
Restart Required: Yes
Instructions:
1. Backup your Gogs data and configuration. 2. Stop the Gogs service. 3. Update to Gogs version 0.12.9 or later. 4. Restart the Gogs service. 5. Verify the update was successful.
🔧 Temporary Workarounds
Restrict File Permissions
linuxSet strict file permissions to limit what files Gogs can access
chmod 750 /path/to/gogs/data
chown -R gogs:gogs /path/to/gogs
Network Segmentation
allRestrict network access to Gogs instance
🧯 If You Can't Patch
- Implement strict file system permissions and access controls
- Use network segmentation and firewall rules to restrict access to Gogs
🔍 How to Verify
Check if Vulnerable:
Check Gogs version. If version is below 0.12.9, the system is vulnerable.Check Version:
Check Gogs web interface admin panel or run: ./gogs --versionVerify Fix Applied:
Verify Gogs version is 0.12.9 or higher and test path traversal attempts are blocked.📡 Detection & Monitoring
Log Indicators:
- Unusual file access patterns
- Multiple failed path traversal attempts
- Access to files outside repository directories
Network Indicators:
- Unusual HTTP requests with path traversal patterns (../ sequences)
- Requests to non-repository file paths
SIEM Query:
source="gogs" AND (http_uri="*../*" OR http_uri="*/../*")