CVE-2020-6313 : Security Advisory and Response

SAP NetWeaver Application Server JAVA(XML Forms) versions 7.30, 7.31, 7.40, 7.50 are vulnerable to Stored Cross-Site Scripting due to insufficient input encoding.

Understanding CVE-2020-6313

This CVE involves a security vulnerability in SAP NetWeaver AS JAVA (XML Forms) that could allow an authenticated user to execute malicious JavaScript.

What is CVE-2020-6313?

SAP NetWeaver AS JAVA (XML Forms) versions 7.30, 7.31, 7.40, 7.50 lack proper input encoding, enabling an attacker to store malicious content that can execute JavaScript when accessed by a victim, leading to Stored Cross-Site Scripting.

The Impact of CVE-2020-6313

The vulnerability poses a medium severity risk with a CVSS base score of 5.4. An attacker could exploit this issue to perform malicious actions on the victim's behalf.

Technical Details of CVE-2020-6313

Vulnerability Description

The vulnerability arises from the inadequate encoding of user-controlled inputs in SAP NetWeaver AS JAVA (XML Forms), allowing the execution of malicious JavaScript.

Affected Systems and Versions

SAP NetWeaver AS JAVA (XML Forms) < 7.30
SAP NetWeaver AS JAVA (XML Forms) < 7.31
SAP NetWeaver AS JAVA (XML Forms) < 7.40
SAP NetWeaver AS JAVA (XML Forms) < 7.50

Exploitation Mechanism

The vulnerability requires an authenticated user with special roles to store malicious content that, when accessed by a victim, triggers the execution of JavaScript.

Mitigation and Prevention

Immediate Steps to Take

Apply the latest security patches provided by SAP.
Monitor and restrict user access to critical functions.
Educate users on safe browsing practices.

Long-Term Security Practices

Regularly update and patch SAP systems.
Conduct security assessments and penetration testing.
Implement security controls to prevent XSS attacks.

Patching and Updates

SAP has released patches to address this vulnerability. Ensure all affected systems are updated with the latest security fixes.