Medium Severity
Affected system
Java

CVSS
4.7

Component
BC-JAS-ADM-ADM
Patchday
2020-10
Released on
2020/10/13
SAP Note
2965315
Workaround
No
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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 2965315 was released on 13.10.2020 and deals with "[CVE-2020-6365] Reverse Tabnabbing vulnerability in SAP NetWeaver AS Java Start Page" within Java. We advice you to follow the instructions, to resolve reverse tabnabbing with a medium potential for exploitation in component BC-JAS-ADM-ADM.

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

Risk specification

The SAP NetWeaver AS Java Start Page allows an unauthenticated remote attacker to redirect users to a malicious site due to insufficient reverse tabnabbing URL validation. Reverse tabnabbing is an attack where a page linked from the target page is able to rewrite that page, for example, to replace it with a phishing site.

Solution

The affected application no longer allows browser's child window to control the parent window object.

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

  • J2EE-APPS 7.10-7.11
  • J2EE-APPS 7.20
  • J2EE-APPS 7.30
  • J2EE-APPS 7.31
  • J2EE-APPS 7.40
  • J2EE-APPS 7.50

 

Disclaimer

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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