Advisory

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. The risk rises since a public exploit exists!

Solution

SAP NetWeaver LM Configuration Wizard now properly enforces authentication and authorization. Alternativly, the consulting team has proposed the following: "Deactivate on all application servers the aliases CTCWebService ctc/core ctcprotocol respective application tc~lm~ctc~cul~startup_appand validate that service CTCWebService is offline as described in KBA 2939665". The suggestion may be considered, as a workaround or compensating mitigation. We recommend installing/applying the correction wherever possible and as soon as possible. Base your decision on whether or not to apply the patch on your companies and systems risk perspective and consider the provided CVSS 10.0 score.

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

LMCTC 7.30
LMCTC 7.31
LMCTC 7.40
LMCTC 7.50

Disclaimer

SecurityBridge takes the security of SAP products very seriously. We very much encourage the responsible disclosure of security vulnerabilities. If you have detected a vulnerability concerning 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 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 10.0

Component BC-INS-CTC

Patch Day2020-07

Released on2020/07/14

SAP Note 2934135

Workaround Yes

Advisory

Risk specification

Solution

Affected System

Disclaimer

_{Affected system}
Java

_CVSS
10.0

_Component
BC-INS-CTC

_{Patch Day}
2020-07

_{Released
on}
2020/07/14

_{SAP Note}
2934135

_Workaround
Yes