CVE-2025-42925
📋 TL;DR
This vulnerability in SAP NetWeaver AS JAVA IIOP service allows authenticated attackers with low privileges to predict Object Identifiers due to insufficient randomness, enabling them to brute-force identifiers and potentially access limited system information. It affects SAP NetWeaver AS JAVA systems using the IIOP service, posing a low confidentiality risk without impacting integrity or availability.
💻 Affected Systems
- SAP NetWeaver AS JAVA
⚠️ 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
An attacker could predict Object Identifiers to access sensitive system information, potentially leading to data exposure or further reconnaissance for other attacks.
Likely Case
Limited information disclosure, such as internal system details, which might aid in subsequent attacks but does not directly compromise critical data.
If Mitigated
With proper access controls and patching, the risk is minimal, as attackers would be blocked from exploiting the vulnerability or find it ineffective.
🎯 Exploit Status
Exploitation requires authenticated access and brute-force capabilities, making it moderately complex but feasible for determined attackers.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Refer to SAP Note 3640477 for specific patch versions.
Vendor Advisory: https://me.sap.com/notes/3640477
Restart Required: No
Instructions:
1. Review SAP Note 3640477 for patch details. 2. Apply the relevant security patch via SAP support tools. 3. Verify the patch installation without restarting the service.
🔧 Temporary Workarounds
Restrict IIOP Service Access
allLimit network access to the IIOP service to trusted IPs or disable it if not needed.
Configure firewall rules to block unauthorized access to IIOP ports.
🧯 If You Can't Patch
- Implement strict access controls to limit low-privilege user access to the IIOP service.
- Monitor logs for unusual brute-force activity against Object Identifiers.
🔍 How to Verify
Check if Vulnerable:
Check if the system is running an affected version of SAP NetWeaver AS JAVA with IIOP enabled, as listed in SAP Note 3640477.Check Version:
Use SAP transaction code SM51 or check system info via SAP GUI to view the kernel and patch levels.Verify Fix Applied:
Verify patch installation by confirming the version matches the patched release in SAP Note 3640477.📡 Detection & Monitoring
Log Indicators:
- Multiple failed authentication attempts or unusual access patterns to IIOP service logs.
Network Indicators:
- High volume of requests to IIOP ports from single sources, indicating brute-force attempts.
SIEM Query:
Example: 'source="SAP_IIOP_logs" AND event_type="authentication_failure" AND count > 10 within 5m'