CVE-2025-0067 in NetWeaver Application Server Java
Summary
by MITRE • 01/14/2025
Due to a missing authorization check on service endpoints in the SAP NetWeaver Application Server Java, an attacker with standard user role can create JCo connection entries, which are used for remote function calls from or to the application server. This could lead to low impact on confidentiality, integrity, and availability of the application.
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Analysis
by VulDB Data Team • 01/18/2025
The vulnerability identified as CVE-2025-0067 resides within the SAP NetWeaver Application Server Java platform, specifically targeting the authorization mechanisms governing service endpoints. This flaw represents a critical oversight in the access control implementation that allows unauthorized users to bypass standard security restrictions. The vulnerability stems from the absence of proper authorization validation when processing requests to create JCo connection entries, which are fundamental components enabling remote function calls between systems. Such connections are typically restricted to authorized personnel with specific privileges, yet this weakness permits any user with standard access rights to establish these connections.
The technical exploitation of this vulnerability occurs through the manipulation of service endpoint requests where the application server fails to verify whether the requesting user possesses sufficient authorization to create JCo connection entries. This missing authorization check creates a pathway for attackers to establish unauthorized connections that can be leveraged for various malicious activities. The JCo (Java Connector) technology serves as a bridge for communication between SAP systems and external applications, making these connection entries particularly valuable for attackers seeking to extend their access beyond normal operational boundaries. The flaw essentially allows an attacker to escalate their privileges implicitly through the creation of unauthorized connection points that can be used for data exfiltration, system manipulation, or further reconnaissance activities.
The operational impact of this vulnerability extends beyond simple unauthorized access, as it fundamentally undermines the security posture of SAP NetWeaver environments. While the immediate impact is categorized as low, the potential for escalation exists through the creation of persistent connection points that could be used for continuous monitoring or data extraction. The confidentiality aspect is compromised as unauthorized connections may provide access to sensitive data flows that should remain restricted. Integrity risks emerge from the possibility of unauthorized modifications to data through these connections, while availability concerns arise from potential resource exhaustion through excessive connection creation. This vulnerability aligns with CWE-284, which addresses improper access control mechanisms, and represents a classic example of insufficient authorization checks in enterprise application servers.
Organizations utilizing SAP NetWeaver Application Server Java must implement immediate remediation measures to address this vulnerability. The primary mitigation strategy involves ensuring that all service endpoints properly validate user authorization before permitting JCo connection creation operations. Security patches provided by SAP should be deployed immediately to address the root cause of the authorization bypass. Network segmentation and monitoring of connection creation activities can serve as additional defensive measures to detect anomalous behavior. Access control policies should be reviewed to ensure that only authorized users possess the necessary privileges to create JCo connections, and privilege escalation should be strictly controlled. The ATT&CK framework categorizes this vulnerability under privilege escalation techniques, specifically targeting the use of application-specific access control bypasses. Regular security assessments and penetration testing should be conducted to identify similar authorization gaps in other SAP components and ensure comprehensive protection against similar threats.