CVE-2023-42439
📋 TL;DR
This CVE describes a Server-Side Request Forgery (SSRF) vulnerability in GeoNode versions 3.2.0 through 4.1.3 that bypasses existing URL whitelist controls. Attackers can exploit this to make the application request internal services and retrieve sensitive data from internal networks. All GeoNode deployments using affected versions are vulnerable.
💻 Affected Systems
- GeoNode
📦 What is this software?
Geonode by Geosolutionsgroup
⚠️ Risk & Real-World Impact
Worst Case
Full compromise of internal network services, data exfiltration from internal systems, potential lateral movement to other internal resources.
Likely Case
Unauthorized access to internal GeoServer instances, exposure of sensitive geospatial data, potential credential harvesting from internal services.
If Mitigated
Limited to reconnaissance of internal network structure, but no data exfiltration if proper network segmentation and access controls are in place.
🎯 Exploit Status
Exploitation requires authenticated access but uses simple URL manipulation techniques.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 4.1.3.post1
Vendor Advisory: https://github.com/GeoNode/geonode/security/advisories/GHSA-pxg5-h34r-7q8p
Restart Required: Yes
Instructions:
1. Backup your GeoNode instance and database. 2. Update to version 4.1.3.post1 or later using pip: 'pip install geonode>=4.1.3.post1'. 3. Restart all GeoNode services. 4. Verify the fix by testing SSRF attempts.
🔧 Temporary Workarounds
Network Segmentation
allRestrict GeoNode's outbound network access to only necessary services
Web Application Firewall Rules
allBlock requests containing '@' or '%40' in URLs at the WAF level
🧯 If You Can't Patch
- Implement strict network segmentation to isolate GeoNode from sensitive internal services
- Deploy a WAF with rules to detect and block SSRF attempts
🔍 How to Verify
Check if Vulnerable:
Check GeoNode version: 'pip show geonode' or examine package metadata. If version is between 3.2.0 and 4.1.3 inclusive, you are vulnerable.Check Version:
pip show geonode | grep VersionVerify Fix Applied:
After patching, attempt to reproduce the SSRF bypass using '@' or '%40' in URLs. Successful fix should reject such requests.📡 Detection & Monitoring
Log Indicators:
- Unusual outbound requests from GeoNode to internal IPs
- Requests containing '@' or '%40' in URL parameters
- Failed authentication attempts to internal services
Network Indicators:
- GeoNode making unexpected connections to internal services on port 8080
- Traffic patterns showing GeoNode accessing non-whitelisted internal resources
SIEM Query:
source="geonode" AND (url="*@*" OR url="*%40*")🔗 References
- https://github.com/GeoNode/geonode/commit/79ac6e70419c2e0261548bed91c159b54ff35b8d
- https://github.com/GeoNode/geonode/releases/tag/4.1.3
- https://github.com/GeoNode/geonode/security/advisories/GHSA-pxg5-h34r-7q8p
- https://github.com/GeoNode/geonode/commit/79ac6e70419c2e0261548bed91c159b54ff35b8d
- https://github.com/GeoNode/geonode/releases/tag/4.1.3
- https://github.com/GeoNode/geonode/security/advisories/GHSA-pxg5-h34r-7q8p
