Advisory

A note with CVSS 3.5 for component BC-JAS-SEC was released by SAP on 08.07.2025. The correction/advisory 3557179 was described with "[CVE-2025-42978] Insufficiently Secure Hostname Verification for Outbound TLS Connections in SAP NetWeaver Application Server Java" and affects the system type Java.

A workaround does not exist, according to SAP Security Advisory team. It is advisable to implement the correction as monthly patch process.

The vulnerability addressed is weak security function within Java.

Risk specification

SAP NetWeaver Application Server Java allows an unauthenticated attacker to establish an outbound connection to a potentially malicious remote TLS server due to insufficient hostname verification against wildcard entries in the server's certificate, potentially leading to information disclosure.

Solution

The issue has been resolved by ensuring that the certificate and the URL's fully qualified domain names (FQDNs) contain the same number of domain components during verification.

Affected System

SAP Netweaver Application Server Java is part of the SAP NetWeaver Application Platform. It provides the complete infrastructure for deploying and running Java applications.

The AS Java Home: SAP Netweaver Application Server Java wiki
A dedicated SAP NetWeaver 7.40 Application Server for Java Security Guide exists.

The advisory is valid for

ENGINEAPI 7.50 ⁹

Releated advisories

Disclaimer

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The advisories found within the SecurityBridge advisory are generated and continuously enriched by our Team at SecurityBridge and affiliated security consultants, partners, customers of the SecurityBridge Platform, SAP support, and advisory groups.

We do not disclose zero-day vulnerabilities unless a security patch has been made available to the public. In such case, the platform only provides details on which version or signature updates are available within the SecurityBridge platform in order to monitor or measure the vulnerability.

In accordance with SAP guidelines, SecurityBridge only discloses issues where the fixing security note has been released. The vulnerability platform makes no references to available exploits or Proof of Concepts (PoC). Advisories and vulnerabilities will always mention the fixing security note or hints to the corresponding SAP documentation.

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Notifications

Affected system Java

CVSS 3.5

Component BC-JAS-SEC

Patch Day2025-07

Released on2025/07/08

SAP Note 3557179

Workaround No

Advisory

Risk specification

Solution

Affected System

Disclaimer

_{Affected system}
Java

_CVSS
3.5

_Component
BC-JAS-SEC

_{Patch Day}
2025-07

_{Released
on}
2025/07/08

_{SAP Note}
3557179

_Workaround
No