CVE-2018-2368
📋 TL;DR
CVE-2018-2368 is a critical authentication bypass vulnerability in SAP NetWeaver System Landscape Directory (LM-CORE) that allows unauthenticated attackers to access functionalities requiring user identity. This affects SAP NetWeaver versions 7.10 through 7.40. Organizations running these SAP systems without proper authentication checks are vulnerable to unauthorized access.
💻 Affected Systems
- SAP NetWeaver System Landscape Directory (LM-CORE)
📦 What is this software?
Netweaver System Landscape Directory by Sap
View all CVEs affecting Netweaver System Landscape Directory →
Netweaver System Landscape Directory by Sap
View all CVEs affecting Netweaver System Landscape Directory →
Netweaver System Landscape Directory by Sap
View all CVEs affecting Netweaver System Landscape Directory →
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing attackers to access sensitive business data, modify system configurations, or disrupt SAP operations across the enterprise landscape.
Likely Case
Unauthorized access to sensitive system information, potential data leakage, and ability to manipulate system landscape directory data affecting business processes.
If Mitigated
Limited impact if proper network segmentation and access controls are implemented, though the vulnerability still exists at the application layer.
🎯 Exploit Status
The vulnerability allows unauthenticated access, making exploitation straightforward. While no public PoC exists, the nature of the flaw makes weaponization likely.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Apply SAP Security Note 2565622
Vendor Advisory: https://launchpad.support.sap.com/#/notes/2565622
Restart Required: Yes
Instructions:
1. Download SAP Security Note 2565622 from SAP Support Portal. 2. Apply the note using SAP Note Assistant or transaction SNOTE. 3. Restart the affected SAP NetWeaver System Landscape Directory services.
🔧 Temporary Workarounds
Network Access Restriction
allRestrict network access to SAP NetWeaver System Landscape Directory to only trusted systems and administrators.
Use firewall rules to limit access to TCP ports used by SAP NetWeaver SLD (typically 50000-50050)
Application Layer Filtering
allImplement web application firewall rules to block unauthenticated access attempts to SLD services.
Configure WAF rules to require authentication headers for SLD endpoints
🧯 If You Can't Patch
- Isolate the SAP NetWeaver System Landscape Directory in a separate network segment with strict access controls
- Implement additional authentication layers such as reverse proxy with authentication or VPN access requirements
🔍 How to Verify
Check if Vulnerable:
Check if SAP Security Note 2565622 is applied using transaction SNOTE or by checking system status in SAP GUICheck Version:
In SAP GUI: System → Status → check SAP_BASIS and SAP_ABA component versionsVerify Fix Applied:
Verify the note is implemented and test authentication requirements for SLD functionalities📡 Detection & Monitoring
Log Indicators:
- Unauthenticated access attempts to SLD services
- Failed authentication logs followed by successful access
- Unusual access patterns to SLD endpoints
Network Indicators:
- Unusual traffic to SAP SLD ports from unauthorized sources
- Authentication bypass attempts in HTTP/SOAP requests
SIEM Query:
source="sap_audit_log" AND (event="AUTH_FAILURE" OR event="UNAUTH_ACCESS") AND target="SLD"🔗 References
- http://www.securityfocus.com/bid/103000
- https://blogs.sap.com/2018/02/13/sap-security-patch-day-february-2018/
- https://launchpad.support.sap.com/#/notes/2565622
- http://www.securityfocus.com/bid/103000
- https://blogs.sap.com/2018/02/13/sap-security-patch-day-february-2018/
- https://launchpad.support.sap.com/#/notes/2565622
