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How the CVE Works:
The vulnerability occurs due to improper access control in GeoServer’s REST API endpoint handling. By default, the security filter checks paths like `/rest` and `/rest/` but fails to enforce authorization on requests ending with extensions (e.g., /rest.html). Attackers can exploit this oversight to access the REST API index page, potentially leaking sensitive details about installed extensions. This bypass exposes system metadata without authentication, increasing reconnaissance risks.
DailyCVE Form:
Platform: GeoServer
Version: <=2.25.0
Vulnerability: Missing Auth Bypass
Severity: Moderate
Date: Jun 10, 2025
Prediction: Patch by Jul 15, 2025
What Undercode Say:
Exploitation:
- Recon: Use curl to probe `/rest.html` or
/rest.xml:curl -v http://<geoserver>/rest.html
- Metadata Extraction: Parse responses for plugin names or version leaks.
Mitigation:
- Manual Fix: Edit `config.xml` as described in the workaround.
- WAF Rules: Block requests to `/rest.` with extensions:
location ~ ^/rest..+$ { deny all; }
3. Patch Check: Monitor GeoServer’s GitHub for updates.
Detection:
grep -r "restfilter" ${GEOSERVER_DATA_DIR}/security/
Log Monitoring:
tail -f /var/log/geoserver/.log | grep "Unauthorized access"
Temporary Lockdown:
<!-- Updated config.xml snippet --> <filterChain> <filter ref="restfilter" pattern="/rest.,/rest/"/> </filterChain>
References for Devs:
- Always validate path normalization in security filters.
- Test edge cases (trailing slashes, extensions) during code reviews.
Automated Scan:
import requests
vuln_url = "http://target/rest.html"
response = requests.get(vuln_url)
if "GeoServer REST" in response.text:
print("Vulnerable to CVE-2025-XXXX")
Post-Patch Audit:
geoserver/bin/startup.sh --verify-security
Impact Reduction:
- Disable REST API if unused via
web.xml. - Rate-limit `/rest` endpoints.
Note: Until patched, monitor for anomalous access patterns to `/rest.` paths.
Sources:
Reported By: github.com
Extra Source Hub:
Undercode
