CVE-2014-4160 in NetWeaver Business Client
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in the testcanvas node in SAP NetWeaver Business Client (NWBC) allow remote attackers to inject arbitrary web script or HTML via the (1) title or (2) sap-accessibility parameter.
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Analysis
by VulDB Data Team • 03/11/2018
The vulnerability identified as CVE-2014-4160 represents a critical cross-site scripting flaw within SAP NetWeaver Business Client's testcanvas node implementation. This vulnerability affects the web application's ability to properly sanitize user input, creating an avenue for malicious actors to execute arbitrary web scripts or HTML code within the context of authenticated user sessions. The affected parameters include both the title and sap-accessibility elements, which are processed without adequate input validation or output encoding mechanisms.
The technical exploitation of this vulnerability occurs through the manipulation of specific HTTP parameters that are passed to the testcanvas node component. When these parameters contain malicious script code, the application fails to properly escape or filter the input before rendering it in the browser context. This allows attackers to inject JavaScript payloads that can execute in the victim's browser, potentially leading to session hijacking, data theft, or further exploitation of the SAP environment. The vulnerability falls under CWE-79 which specifically addresses Cross-Site Scripting flaws in web applications.
From an operational perspective, this vulnerability poses significant risk to SAP NetWeaver Business Client deployments where users may have elevated privileges or access to sensitive business data. Attackers can leverage this vulnerability to establish persistent access to systems by stealing session cookies or injecting malicious code that can harvest user credentials. The impact extends beyond simple script injection as it can enable more sophisticated attacks such as man-in-the-middle operations or privilege escalation within the SAP ecosystem. The vulnerability's remote exploitability means that attackers do not require physical access to the network or system to initiate attacks, making it particularly dangerous in enterprise environments.
The exploitation of CVE-2014-4160 aligns with several tactics outlined in the MITRE ATT&CK framework, particularly those related to initial access and persistence. Attackers can use this vulnerability as part of a broader attack chain to gain a foothold within SAP environments, potentially leading to lateral movement and privilege escalation. The vulnerability's presence in the testcanvas node suggests that it may be accessible through various application interfaces, increasing the attack surface and potential impact. Organizations should consider this vulnerability as part of their comprehensive security posture assessment, especially in environments where SAP systems handle sensitive business information or financial data.
Mitigation strategies for this vulnerability should include immediate application of SAP security patches and hotfixes specifically addressing the XSS flaws in the testcanvas node. Organizations should implement robust input validation and output encoding mechanisms at all application layers, ensuring that user-supplied data is properly sanitized before processing. Network segmentation and access controls can help limit the potential impact of successful exploitation attempts. Security monitoring should be enhanced to detect anomalous patterns in parameter usage that might indicate attempted exploitation of this vulnerability. Additionally, regular security assessments and penetration testing should be conducted to identify similar vulnerabilities in other SAP components or custom applications that may be susceptible to cross-site scripting attacks.