CVE-2023-42477 in NetWeaver AS Java
Summary
by MITRE • 10/25/2023
SAP NetWeaver AS Java (GRMG Heartbeat application) - version 7.50, allows an attacker to send a crafted request from a vulnerable web application, causing limited impact on confidentiality and integrity of the application.
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Analysis
by VulDB Data Team • 10/25/2023
SAP NetWeaver Application Server Java version 7.50 contains a vulnerability in the GRMG Heartbeat application that presents a significant security risk to organizations relying on this platform. This vulnerability falls under the category of insufficient input validation and inadequate access controls, which are commonly classified as CWE-20 Weakness in the OWASP Top Ten and CWE-79 Improper Neutralization of Input During Web Page Generation. The affected component specifically relates to the heartbeat monitoring functionality that is critical for maintaining system availability and health status reporting within the SAP environment.
The technical flaw manifests when an attacker can craft and send malicious requests through a vulnerable web application interface that communicates with the GRMG Heartbeat service. This vulnerability enables unauthorized access to sensitive system information and allows potential manipulation of data integrity within the monitored application. The impact is classified as limited but significant, affecting both confidentiality and integrity aspects of the affected system. Attackers can exploit this weakness to gather information about the system configuration, monitor application behavior, and potentially disrupt normal operations through data corruption or manipulation of heartbeat status information.
The operational impact of this vulnerability extends beyond simple data exposure, as it can be leveraged as a stepping stone for more sophisticated attacks within the SAP ecosystem. The limited nature of the impact does not diminish its potential for causing disruption to business operations, particularly when combined with other vulnerabilities or attack vectors. Organizations utilizing SAP NetWeaver AS Java 7.50 may experience unauthorized access to system monitoring data, which could provide attackers with insights into system architecture and operational patterns. This information can be particularly valuable for attackers planning more extensive attacks against the SAP infrastructure, as it reveals system health indicators and operational statuses that may not be otherwise visible through standard reconnaissance activities.
From an ATT&CK framework perspective, this vulnerability aligns with techniques such as T1071.004 Application Layer Protocol: DNS and T1566 Phishing, as attackers may use the information gathered to craft more convincing social engineering campaigns or to identify potential targets within the SAP environment. The vulnerability also relates to T1213 Data from Information Repositories, as it provides access to system information that can be used for further exploitation. Organizations should implement comprehensive monitoring solutions that can detect unusual patterns in heartbeat requests and establish strict access controls for the GRMG Heartbeat application. Regular security assessments and penetration testing should be conducted to identify similar weaknesses in other SAP components, while maintaining up-to-date patches and implementing network segmentation to limit potential attack surface. The vulnerability demonstrates the importance of securing all components within enterprise application platforms, as even monitoring functions can become attack vectors when not properly secured against crafted requests and unauthorized access attempts.