CVE-2021-33664 : Exploit Details and Defense Strategies

SAP NetWeaver Application Server ABAP (Applications based on Web Dynpro ABAP) versions SAP_UI - 750,752,753,754,755, SAP_BASIS - 702, 731 are vulnerable to Cross-Site Scripting (XSS) due to insufficient user-controlled inputs encoding.

Understanding CVE-2021-33664

This CVE identifies a Cross-Site Scripting (XSS) vulnerability in SAP NetWeaver Application Server ABAP versions.

What is CVE-2021-33664?

SAP NetWeaver Application Server ABAP, when running applications based on Web Dynpro ABAP, fails to encode user-controlled inputs adequately, enabling attackers to execute malicious scripts in users’ browsers.

The Impact of CVE-2021-33664

The vulnerability carries a CVSS base score of 5.4 (Medium severity) and requires user interaction for exploitation, potentially leading to XSS attacks.

Technical Details of CVE-2021-33664

This section provides in-depth technical insights into the vulnerability.

Vulnerability Description

The XSS flaw in SAP NetWeaver Application Server ABAP allows threat actors to inject and execute malicious scripts in users’ browsers.

Affected Systems and Versions

SAP NetWeaver Application Server ABAP versions SAP_UI - 750,752,753,754,755, SAP_BASIS - 702, 731 are affected by this security issue.

Exploitation Mechanism

Attackers can exploit this vulnerability by injecting malicious code via user-controlled inputs, leveraging the lack of proper encoding.

Mitigation and Prevention

Learn how to mitigate the risks associated with CVE-2021-33664.

Immediate Steps to Take

Ensure all user inputs are properly validated and encoded to prevent XSS attacks. Apply the necessary security patches or updates from SAP.

Long-Term Security Practices

Implement secure coding practices, conduct regular security assessments, and educate users on safe browsing habits to mitigate XSS risks.

Patching and Updates

Stay up to date with SAP security advisories and promptly apply patches or updates to address vulnerabilities like CVE-2021-33664.