CVE-2020-6367 in NetWeaver Composite Application Framework
Summary
by MITRE • 10/20/2020
There is a reflected cross site scripting vulnerability in SAP NetWeaver Composite Application Framework, versions - 7.20, 7.30, 7.31, 7.40, 7.50. An unauthenticated attacker can trick an unsuspecting authenticated user to click on a malicious link. The end users browser has no way to know that the script should not be trusted, and will execute the script, resulting in sensitive information being disclosed or modified.
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Analysis
by VulDB Data Team • 11/21/2020
The vulnerability CVE-2020-6367 represents a critical reflected cross site scripting flaw within SAP NetWeaver Composite Application Framework across multiple version lines including 7.20, 7.30, 7.31, 7.40, and 7.50. This vulnerability operates under the CWE-79 classification as a classic cross site scripting attack vector where malicious scripts are injected into web applications through user input fields. The flaw specifically manifests when the application fails to properly sanitize user-supplied input before reflecting it back to the user's browser in the HTTP response.
The attack scenario involves an unauthenticated attacker crafting malicious links that exploit the reflected XSS vulnerability by embedding malicious JavaScript code within the application's response. When an authenticated user clicks on such a crafted link, their browser executes the injected script within the context of the vulnerable application. This occurs because the web application does not distinguish between legitimate and malicious content, treating all responses equally regardless of their source or intent. The reflected nature of this vulnerability means that the malicious payload is immediately reflected back from the server to the user's browser without being stored on the server, making detection more challenging for traditional security measures.
The operational impact of this vulnerability extends beyond simple data exfiltration as it can enable complete session hijacking and privilege escalation within the affected application environment. Attackers can leverage this vulnerability to steal session cookies, modify application data, redirect users to malicious sites, or even perform actions on behalf of authenticated users. The fact that this vulnerability affects SAP NetWeaver Composite Application Framework components means that organizations using these enterprise application integration platforms face significant risk of unauthorized access to sensitive business data and operational controls. The vulnerability essentially provides attackers with a foothold to escalate privileges and access restricted application features that require legitimate user authentication.
Mitigation strategies for CVE-2020-6367 should prioritize immediate patch deployment from SAP as the primary defense mechanism, ensuring all affected versions are updated to the latest security releases. Organizations should implement comprehensive input validation and output encoding mechanisms at all entry points where user data is processed, following the principle of least privilege for web application components. Network-based security controls including web application firewalls should be configured to detect and block common XSS attack patterns, while also implementing Content Security Policy headers to prevent execution of unauthorized scripts. The ATT&CK framework categorizes this vulnerability under T1059.007 for Scripting and T1566 for Phishing, highlighting the multi-stage attack approach that organizations must defend against through layered security controls and user awareness training programs.