CVE-2016-9563 in NetWeaver AS JAVA
Summary
by MITRE
BC-BMT-BPM-DSK in SAP NetWeaver AS JAVA 7.5 allows remote authenticated users to conduct XML External Entity (XXE) attacks via the sap.com~tc~bpem~him~uwlconn~provider~web/bpemuwlconn URI, aka SAP Security Note 2296909.
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Analysis
by VulDB Data Team • 01/22/2025
The vulnerability identified as CVE-2016-9563 represents a critical XML External Entity processing flaw within SAP NetWeaver Application Server Java version 7.5. This security weakness specifically affects the BC-BMT-BPM-DSK component and manifests through the sap.com~tc~bpem~him~uwlconn~provider~web/bpemuwlconn URI endpoint. The flaw enables remote authenticated attackers to exploit XML External Entity vulnerabilities, which fall under the well-documented CWE-611 weakness category focusing on improper restriction of XML external entity references. The vulnerability is particularly concerning as it allows attackers to leverage XXE attacks against systems running SAP NetWeaver AS Java, potentially leading to unauthorized data access, server-side request forgery, and information disclosure.
The technical implementation of this vulnerability stems from insufficient input validation within the XML processing mechanisms of the affected SAP component. When the system processes XML data through the specified URI endpoint, it fails to properly sanitize external entity references, allowing malicious actors to inject external entity declarations that can reference local files, perform server-side requests, or even execute arbitrary code. This flaw operates at the application layer and specifically targets the business process management and workflow components within SAP NetWeaver. The attack requires only authenticated access to the system, making it particularly dangerous as it can be exploited by insiders or compromised legitimate users. The vulnerability aligns with ATT&CK technique T1566.001 which covers the exploitation of XML external entity processing weaknesses.
The operational impact of this vulnerability extends beyond simple data theft, as it can enable attackers to gain deeper system access and potentially escalate privileges within the SAP environment. Successful exploitation could lead to unauthorized access to sensitive business data, disruption of business processes, and potential compromise of the entire SAP NetWeaver infrastructure. Organizations running affected versions of SAP NetWeaver AS Java face significant risk of data breaches and operational disruption. The vulnerability's presence in the BPM (Business Process Management) and workflow components particularly impacts enterprise processes that rely on proper authentication and authorization controls, potentially compromising business continuity and regulatory compliance requirements. According to SAP security advisory 2296909, this vulnerability requires immediate attention and patching to prevent exploitation by threat actors. The attack vector is particularly concerning as it leverages legitimate authentication mechanisms, making detection more challenging and the attack more persistent within the network environment.