CVE-2023-2827
📋 TL;DR
SAP Plant Connectivity (PCo) 15.5 and Production Connector for SAP Digital Manufacturing 1.0 fail to validate JWT signatures in HTTP requests, allowing unauthorized internal network callers to send service requests. This vulnerability could compromise the integrity of integration with SAP Digital Manufacturing systems.
💻 Affected Systems
- SAP Plant Connectivity (PCo)
- Production Connector for SAP Digital Manufacturing
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could manipulate production data, disrupt manufacturing operations, or inject malicious commands into the integration pipeline, potentially causing production downtime or safety issues.
Likely Case
Internal attackers could send unauthorized service requests to modify or disrupt data flows between SAP Digital Manufacturing and plant systems, affecting production accuracy.
If Mitigated
With proper network segmentation and access controls, impact is limited to authorized internal users who might abuse their privileges.
🎯 Exploit Status
Exploitation requires internal network access but no authentication. Attackers can craft malicious JWT tokens without valid signatures.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Apply SAP Note 3301942
Vendor Advisory: https://launchpad.support.sap.com/#/notes/3301942
Restart Required: Yes
Instructions:
1. Download and apply SAP Note 3301942. 2. Restart affected services. 3. Verify JWT signature validation is now enforced.
🔧 Temporary Workarounds
Network Segmentation
allRestrict network access to PCo and Production Connector endpoints to only authorized SAP Digital Manufacturing systems.
Firewall Rules
allImplement strict firewall rules to limit which internal systems can communicate with vulnerable endpoints.
🧯 If You Can't Patch
- Implement strict network segmentation to isolate vulnerable systems from untrusted internal networks
- Deploy network monitoring and intrusion detection for unauthorized service requests to affected endpoints
🔍 How to Verify
Check if Vulnerable:
Check if running PCo 15.5 or Production Connector 1.0 without SAP Note 3301942 applied. Review configuration to see if JWT signature validation is disabled.Check Version:
Check SAP system documentation or administration console for version information.Verify Fix Applied:
Verify SAP Note 3301942 is applied and test that JWT tokens without valid signatures are rejected.📡 Detection & Monitoring
Log Indicators:
- Failed JWT validation attempts
- Unauthorized service requests to PCo endpoints
- Unusual patterns in manufacturing integration logs
Network Indicators:
- HTTP requests to PCo/Production Connector endpoints with malformed or unsigned JWT tokens
- Traffic from unauthorized internal IP addresses to vulnerable endpoints
SIEM Query:
source="pco_logs" AND (event="service_request" AND NOT user="authorized") OR (jwt_validation="failed")