CVE-2025-42957
📋 TL;DR
This critical vulnerability in SAP S/4HANA allows authenticated users to inject arbitrary ABAP code via RFC-exposed function modules, bypassing authorization checks. This effectively creates a backdoor that can lead to complete system compromise. All SAP S/4HANA systems with the vulnerable component are affected.
💻 Affected Systems
- SAP S/4HANA
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise allowing attacker to execute arbitrary ABAP code, access/modify all data, create persistent backdoors, and disrupt business operations.
Likely Case
Privilege escalation leading to unauthorized data access, configuration changes, and potential lateral movement within the SAP landscape.
If Mitigated
Limited impact if proper network segmentation, strict user access controls, and monitoring are in place, but risk remains significant.
🎯 Exploit Status
Exploitation requires authenticated user access; ABAP code injection via RFC is well-understood attack vector
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Refer to SAP Note 3627998 for specific patch details
Vendor Advisory: https://me.sap.com/notes/3627998
Restart Required: Yes
Instructions:
1. Access SAP Support Portal
2. Download and apply security patch from SAP Note 3627998
3. Apply SAP Security Patch Day updates
4. Restart affected SAP systems
🔧 Temporary Workarounds
Restrict RFC Access
allLimit RFC connections to trusted systems only and disable unnecessary RFC function modules
Use transaction SM59 to review and restrict RFC destinations
Use transaction SE37 to deactivate vulnerable function modules
Enhance User Authorization
allImplement strict authorization checks and principle of least privilege for all users
Review and tighten authorization profiles via transaction PFCG
Implement SAP GRC Access Control
🧯 If You Can't Patch
- Implement network segmentation to isolate SAP systems from untrusted networks
- Enable detailed logging and monitoring of RFC transactions and ABAP code execution
🔍 How to Verify
Check if Vulnerable:
Check if your SAP S/4HANA version matches affected versions listed in SAP Note 3627998Check Version:
Execute transaction SM51 to check SAP kernel and system versionVerify Fix Applied:
Verify patch application via SAP Note 3627998 implementation and test that ABAP code injection via RFC is no longer possible📡 Detection & Monitoring
Log Indicators:
- Unusual RFC connections
- ABAP code execution patterns in system logs
- Authorization failures for function modules
Network Indicators:
- Unexpected RFC traffic patterns
- Connections to SAP system from unauthorized sources
SIEM Query:
Search for event IDs related to RFC function module execution and ABAP code injection attempts