On 13.09.2022 a security relevant correction has been released by SAP SE. The manufacturer resolves an issue within ABAP.
SAP Note 3229820 addresses "[CVE-2022-39799] Cross-Site Scripting (XSS) vulnerability in SAP NetWeaver AS ABAP (SAP GUI for HTML within the Fiori Launchpad)" to prevent cross-site scripting (xss) with a medium risk for exploitation.
A workaround does exist, according to SAP Security Advisory team. It is advisable to implement the correction as part of maintenance, the team suggests.
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 specificationSAP GUI for HTML within Fiori Launchpad does not sufficiently encode user-controlled inputs, resulting in Cross-Site Scripting (XSS) vulnerability, allowing an unauthenticated attacker to steal session credentials.
The application now properly checks user-provided input. Circumstances exist that prevent the timely installation of a patch provided by the manufacturer. In such cases, you may consider applying the suggested workaround as a temporary or compensating mitigation: "Cross-site scripting/request forgery filter engine on IDS/IPS/firewall systems. ".
The advisory 3229820 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)
- 6.5 [CVE-2022-35297] Stored Cross-Site Scripting (XSS) vulnerability in SAP Enable Now
- 6.4 [CVE-2021-27615] Cross-Site Scripting (XSS) vulnerability in SAP Manufacturing Execution