Hot Note
Affected system
Java

CVSS
9.1

Component
EP-KM-CM-UI
Patchday
2020-04
Released on
2020/04/14
SAP Note
2896682
Workaround exist
Yes
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Advisory

The advisory for Java adresses a "[CVE-2020-6225] Directory Traversal vulnerability in SAP NetWeaver (Knowledge Management)". SAP Note 2896682 was released on 14.04.2020 and should be implemented during part of maintenance. The implementation demands a downtime. Component EP-KM-CM-UI has a hot news risk of exploitation, according to the manufacturers security and response team.

Following the SAP Security Advisory team, a workaround does exist.

Risk specification

SAP NetWeaver Knowledge Management does not sufficiently validate path information provided by users, thus characters representing ‘traverse to parent directory’ are passed through to the file APIs ,allowing an attacker to overwrite, delete, or corrupt arbitrary files on the remote server, leading to Path Traversal.

Solution

SAP NetWeaver Knowledge Management has been updated to include additional checks on the parameter.  And the good news are: a workaround exists, too! This was suggested by the SAP security experts: "The issue is about uploading files into the Portal which require authorizations for Portal Content administration. Therefore you should verify which users are assigne to role pcd:portal_content/administrator/content_admin/content_admin_role"

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

 

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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Cross-Site Scripting

Protecting your SAP© systems against exploitation of directory traversal vulnerabilities is almost impossible without usage of an appropriate cybersecurity software.

Custom coding may be introduced at any moment. According to statistic, at least one vulnerability exists in a set of 1.000 source code lines. In consequence continuous code vulnerability assements are needed to protect your assets.