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How the CVE Works
The vulnerability (CVE-2024-XXXX) in GeoServer arises due to insufficient loop iteration limits in Jiffle script execution. Attackers can craft malicious Jiffle scripts containing infinite loops, either via WMS dynamic styling or WPS processes. Since GeoServer fails to enforce a maximum loop count, these scripts consume excessive CPU resources, leading to denial of service (DoS). The Jiffle runtime lacks proper safeguards to terminate long-running scripts, allowing attackers to crash or degrade service availability.
DailyCVE Form
Platform: GeoServer
Version: <= 2.23.x
Vulnerability: Infinite Loop DoS
Severity: Critical
Date: 2024-06-11
Prediction: Patch by 2024-08-30
What Undercode Say:
Exploitation Analysis
1. Malicious Jiffle Script Example:
while (true) { x = x + 1; } // Infinite loop
2. Exploit via WMS:
curl -X POST "http://<geoserver>/wms?request=GetMap&styles=malicious_jiffle"
3. Exploit via WPS:
curl -X POST "http://<geoserver>/wps" -d @exploit.xml
Where `exploit.xml` contains the malicious Jiffle script.
Protection Commands
1. Disable WMS Dynamic Styling:
Edit geoserver_data/global.xml <dynamicStylingEnabled>false</dynamicStylingEnabled>
2. Disable Jiffle WPS Process:
Remove/disable jiffle process factory in WPS config
3. Patch Validation:
grep -r "JiffleRuntime" /path/to/geoserver Check for loop limits
Detection Script
import requests
response = requests.get("http://<geoserver>/wms?request=GetCapabilities")
if "Jiffle" in response.text:
print("Vulnerable to CVE-2024-XXXX")
Mitigation via API
GeoServer REST API call to disable WPS
curl -u admin:geoserver -X PUT -H "Content-Type: application/json" \
-d '{"wps": {"enabled": false}}' http://<geoserver>/rest/services/wps/settings
Log Monitoring
tail -f /var/log/geoserver/.log | grep -i "jiffle|loop"
Expected Patch Code Fix
// JiffleRuntime.java
if (loopCounter > MAX_ITERATIONS) {
throw new RuntimeException("Loop iteration limit exceeded");
}
References for Developers
No further commentary provided.
Sources:
Reported By: github.com
Extra Source Hub:
Undercode
