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 3084487 was released on 14.09.2021 and deals with "[CVE-2021-38163] Unrestricted File Upload vulnerability in SAP NetWeaver (Visual Composer 7.0 RT)" within Java. We advice you to follow the instructions, to resolve command injection with a hot news potential for exploitation in component EP-VC-RTM.

According to SAP Security Advisory team a workaround exists. It is advisable to implement the correction as part of maintenance.

Risk specification

SAP NetWeaver Visual Composer allows an authenticated attacker to upload a malicious file over a network and triggers its processing. This results in running system commands with the privileges of the Java Server process and could lead to read or modify of information with possible shut down rendering the system unavailable.

Solution

The vulnerable component is removed. Alternativly, the consulting team has proposed the following: "A workaround for versions that do not contain a patch would be to un-deploy the whole VC70RUNTIME.SCA from the system. Find more information on the procedure please view link in the note.". 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 9.9 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

VC70RUNTIME 7.30
VC70RUNTIME 7.31
VC70RUNTIME 7.40
VC70RUNTIME 7.50

Releated advisories

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 9.9

Component EP-VC-RTM

Patch Day2021-09

Released on2021/09/14

SAP Note 3084487

Workaround Yes

Advisory

Risk specification

Solution

Affected System

Disclaimer

_{Affected system}
Java

_CVSS
9.9

_Component
EP-VC-RTM

_{Patch Day}
2021-09

_{Released
on}
2021/09/14

_{SAP Note}
3084487

_Workaround
Yes