CVE-2023-46502
📋 TL;DR
This vulnerability in openCRX v5.2.2 allows remote attackers to read internal files and perform server-side request forgery (SSRF) attacks due to insecure DocumentBuilderFactory configuration. Attackers can exploit this to access sensitive data and make unauthorized requests from the server. All openCRX v5.2.2 installations are affected.
💻 Affected Systems
- openCRX
📦 What is this software?
Opencrx by Opencrx
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise including sensitive data exfiltration, internal network reconnaissance, and potential lateral movement within the network.
Likely Case
Unauthorized access to internal files containing configuration data, credentials, or sensitive business information, plus ability to make requests to internal services.
If Mitigated
Limited impact with proper network segmentation and file system permissions, though SSRF capabilities may still allow some internal probing.
🎯 Exploit Status
Proof of concept code is publicly available in GitHub gists. Exploitation requires minimal technical skill.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Fixed in commit ce7a71db0bb34ecbcb0e822d40598e410a48b399
Vendor Advisory: https://github.com/opencrx/opencrx/commit/ce7a71db0bb34ecbcb0e822d40598e410a48b399
Restart Required: Yes
Instructions:
1. Update to the latest openCRX version containing the fix. 2. Apply the patch from commit ce7a71db0bb34ecbcb0e822d40598e410a48b399. 3. Restart the openCRX application server.
🔧 Temporary Workarounds
Network Segmentation
linuxRestrict openCRX server's outbound network access to prevent SSRF exploitation
iptables -A OUTPUT -p tcp -m multiport --dports 80,443,8080,8443 -j DROP
File System Restrictions
linuxApply strict file permissions to limit accessible directories
chmod 750 /path/to/opencrx/data
chown root:opencrx /path/to/opencrx
🧯 If You Can't Patch
- Implement strict network segmentation to isolate openCRX from sensitive internal systems
- Deploy web application firewall (WAF) with SSRF and file access protection rules
🔍 How to Verify
Check if Vulnerable:
Check if running openCRX v5.2.2 by examining version files or application metadataCheck Version:
grep -r "5.2.2" /path/to/opencrx/installation/ || cat /path/to/opencrx/META-INF/MANIFEST.MFVerify Fix Applied:
Verify the commit hash includes ce7a71db0bb34ecbcb0e822d40598e410a48b399 or later📡 Detection & Monitoring
Log Indicators:
- Unusual file access patterns in openCRX logs
- HTTP requests to internal IP addresses from openCRX server
Network Indicators:
- openCRX server making unexpected outbound connections to internal services
SIEM Query:
source="opencrx" AND (url="file://*" OR dest_ip IN (RFC1918_IP_RANGE))🔗 References
- https://gist.github.com/spookhorror/9519fc66d3946e887e4a86c06ddbee0e
- https://github.com/opencrx/opencrx/commit/ce7a71db0bb34ecbcb0e822d40598e410a48b399
- https://gist.github.com/spookhorror/9519fc66d3946e887e4a86c06ddbee0e
- https://github.com/opencrx/opencrx/commit/ce7a71db0bb34ecbcb0e822d40598e410a48b399
