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 3084937
was released on
12.10.2021 and deals with
"[CVE-2021-38183] Cross-Site Scripting (XSS) vulnerability in cms Service of SAP NetWeaver" within ABAP.
We advice you to follow the instructions, to resolve
cross-site scripting (xss)
medium potential for exploitation
in component BC-CTS-TMS.
According to SAP Security Advisory team a workaround exists. It is advisable to implement the correction as monthly patch process.
Missing authority checks are still the most common security defect related to authorizations in custom code.
Since SAP uses an explicit authorization model, an authority checks must be coded in order to be executed. If an
explicit check is not coded, all users have access.
This type of vulnerability not only exists in SAP standard it also exists in customer coding. Check your custom
developments for vulnerabilities that pose a risk to your systems. SecurityBridge helps
vulnerabilities before they are implemented in production.
Cross-site scripting (XSS) is the name of a class of security vulnerabilities that can occur in web-based
applications. XSS combines
affected web application.
Risk specificationThe service /sap/bc/cms which was delivered by accident does allow an authenticated attacker to execute a reflected cross-site-scripting attack.
The service will be deactivated as it was not intended to be delivered to customers. Alternativly, the consulting team has proposed the following: "As a workaround, the ICF service /sap/bc/cms can be deactivated in the system". 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 5.4 score.
The advisory 3084937 describes a problem within an ABAP based systems of a specific version. Affected versions are described below. ABAP software is deployed in various software components and is widely used within the SAP product portfolio.
SAP NetWeaver Application Server (formally known as SAP Web Application Server) is a building block of SAP NetWeaver. It is the foundation for most software products developed by SAP SE. SAP NetWeaver systems exist with Java and/or ABAP stacks. The advisory could be relevant for single and dual-stack ABAP installations.
The advisory is valid for
- 8.3 [CVE-2021-33703] Cross-Site Scripting (XSS) vulnerability in SAP NetWeaver Enterprise Portal
- 8.3 [CVE-2021-33702] Cross-Site Scripting (XSS) vulnerability in SAP NetWeaver Enterprise Portal
- 6.9 [CVE-2021-33691] Cross-Site Scripting (XSS) vulnerability in SAP NetWeaver Development Infrastructure (Notification Service)
- 6.4 [CVE-2021-27600 ] Cross-Site Scripting (XSS) vulnerability in SAP Manufacturing Execution (System Rules)
- 6.4 [CVE-2021-27615] Cross-Site Scripting (XSS) vulnerability in SAP Manufacturing Execution