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SAP takes the security of its vast product portfolio very seriously and thus releases security fixes for vulnerabilities reported by external researchers and their customers every second Tuesday of the month.

SAP Note 2934135 was released on 14.07.2020 and deals with "[CVE-2020-6287] Multiple Vulnerabilities in SAP NetWeaver AS JAVA (LM Configuration Wizard)" within Java. We advice you to follow the instructions, to resolve missing authentication check directory traversal (read) with a hot news potential for exploitation in component BC-INS-CTC.

According to SAP Security Advisory team a workaround exists. It is advisable to implement the correction as monthly patch process.

Risk specification

This note has been re-released with updated ‘Solution’ information. This note addresses multiple security vulnerabilities in SAP NetWeaver AS Java (LM Configuration Wizard). The application does not properly perform an authentication check, allowing an unauthenticated attacker to execute administrative tasks. Additionally, the application does not sufficiently validate user provided path parameters.


SAP NetWeaver LM Configuration Wizard now properly enforces authentication and authorization.  And the good news, a workaround exists, too! This was suggested by the SAP security experts: "Deactivate on all application servers the aliases CTCWebService ctc/core ctcprotocol respective application tc~lm~ctc~cul~startup_app and validate that service CTCWebService is offline as described in KBA 2939665"

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 advisory is valid for

  • LMCTC 7.30
  • LMCTC 7.31
  • LMCTC 7.40
  • LMCTC 7.50



ABEX takes the security of SAP products very seriously. We very much encourage the responsible disclosure of security vulnerabilities. If you have detected a vulnerability in one of the SAP software products – either in the latest or in a former product version follow the guidelines and processes in accordance with the SAP portal page “Report a Security Vulnerability to SAP”.

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

There is no disclosure of zero-day vulnerabilities. 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, ABEX only discloses issues where the fixing security note has been released at least three months ago. 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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