CVE-2025-42875
📋 TL;DR
This vulnerability in SAP Internet Communication Framework allows attackers to bypass authentication by reusing valid authorization tokens without proper validation. It affects SAP systems using ICF components that require user identification. The impact is primarily on authentication integrity with potential unauthorized access.
💻 Affected Systems
- SAP Internet Communication Framework (ICF)
⚠️ 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
Attackers could gain unauthorized access to sensitive business functions, potentially accessing or modifying confidential data, impersonating legitimate users, and performing privileged operations.
Likely Case
Attackers with network access could reuse stolen or intercepted tokens to access authenticated features without proper credentials, leading to unauthorized data access or limited privilege escalation.
If Mitigated
With proper network segmentation, token validation, and monitoring, impact is limited to potential reconnaissance or failed authentication attempts.
🎯 Exploit Status
Exploitation requires network access to vulnerable ICF endpoints and ability to obtain valid authorization tokens through other means.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Apply SAP Security Note 3591163
Vendor Advisory: https://me.sap.com/notes/3591163
Restart Required: Yes
Instructions:
1. Download SAP Note 3591163 from SAP Support Portal. 2. Apply the security patch using SAP transport system. 3. Restart affected SAP instances. 4. Verify patch application in system logs.
🔧 Temporary Workarounds
Network Access Restriction
allRestrict network access to ICF endpoints using firewall rules or SAP router
Configure SAP router rules to limit ICF access
Implement network ACLs to restrict access to vulnerable ports
ICF Service Deactivation
allTemporarily disable non-essential ICF services
Use transaction SICF to deactivate vulnerable services
Execute: /nSICF -> select service -> Deactivate
🧯 If You Can't Patch
- Implement strict network segmentation and firewall rules to limit access to ICF endpoints
- Enable detailed logging for authentication events and monitor for token reuse patterns
🔍 How to Verify
Check if Vulnerable:
Check if SAP Note 3591163 is applied using transaction SNOTE or check system version against affected versions in SAP advisoryCheck Version:
Execute: /nSM51 to check SAP system version and patch levelVerify Fix Applied:
Verify SAP Note 3591163 is successfully applied and no errors in system logs after patch application📡 Detection & Monitoring
Log Indicators:
- Multiple authentication attempts with same token from different IPs
- Unauthorized access attempts to ICF services
- Authentication bypass events in security audit logs
Network Indicators:
- Unusual token reuse patterns
- Authentication requests without proper credential flow
- Access to authenticated endpoints without login sequences
SIEM Query:
source="sap_audit_log" AND (event_type="AUTH_BYPASS" OR message="*token reuse*" OR message="*authentication check missing*")