Medium Severity
Affected system
Java
CVSS
4.8
Component
EP-PIN-PRT
Patch Day
2021-09
Released on
2021/09/14
SAP Note
3082219
Workaround
No
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Advisory

A note with CVSS 4.8 for component EP-PIN-PRT was released by SAP on 14.09.2021. The correction/advisory 3082219 was described with "[CVE-2021-21489] Cross-Site Scripting (XSS) vulnerability in SAP NetWeaver Enterprise Portal" and affects the system type Java.

A workaround does not exist, according to SAP Security Advisory team. It is advisable to implement the correction as part of maintenance.

The vulnerability addressed is Cross-Site Scripting (XSS) within Java.

Cross-site scripting (XSS) is the name of a class of security vulnerabilities that can occur in web-based applications. XSS combines all vulnerabilities that allow an attacker to inject HTML Markup and/or JavaScript into the front end of the affected web application.

XSS attacks can occur whenever the application dynamically creates its HTML/JavaScript/CSS content, which is passed to the user's web browser, and attacker-controlled values are used in this process. If these values are included in the generated code without proper validation and encoding, the attacker is able to include arbitrary coding snippets into the application's front end. The code is then rendered by the victim's web browser and interpreted in the victim's current authentication context.

Risk specification

SAP NetWeaver Portal does not sufficiently encode user-controlled inputs, resulting in Cross-Site Scripting (XSS) vulnerability which would allow an authenticated attacker with high privileges to store malicious script on the system.

Solution

The URL parameters are now properly encoded to prevent a successful XSS attack.

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

 

 

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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.

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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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