On 11.08.2020 a security relevant correction has been released by SAP SE. The manufacturer resolves an issue within Java.
SAP Note 2938162 addresses "[CVE-2020-6293] Unrestricted File Upload in SAP NetWeaver (Knowledge Management)" to prevent missing authentication check with a high risk for exploitation.
A workaround does not exist, according to SAP Security Advisory team. It is advisable to implement the correction as monthly patch process, the team suggests.
Risk specificationSAP NetWeaver Knowledge Management does not properly check the user authentication allowing an unauthenticated attacker to access modify or replace specific files on the system.
SAP NetWeaver Knowledge Management has been updated to properly check for authentication.
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
- KMC-BC 7.30
- KMC-BC 7.31
- KMC-BC 7.40
- KMC-BC 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.