CVE-2025-42994 in MDM Server
Summary
by MITRE • 06/10/2025
SAP MDM Server ReadString function allows an attacker to send specially crafted packets which could trigger a memory read access violation in the server process that would then fail and exit unexpectedly causing high impact on availability with no impact on confidentiality and integrity of the application.
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Analysis
by VulDB Data Team • 06/10/2025
The vulnerability identified as CVE-2025-42994 affects SAP MDM Server implementations where the ReadString function presents a critical memory access flaw that can be exploited through specially crafted network packets. This issue resides within the server-side processing logic that handles string data operations, creating a potential avenue for denial of service attacks that directly impact system availability. The vulnerability specifically manifests when the server process attempts to read memory locations that have not been properly validated or initialized, leading to abrupt termination of the service process.
From a technical perspective, this vulnerability represents a memory safety issue that aligns with CWE-125, which describes out-of-bounds read conditions where programs access memory locations beyond the intended buffer boundaries. The flaw occurs within the ReadString function implementation where input validation is insufficient to prevent malicious data from triggering unauthorized memory access patterns. Attackers can craft specific packet sequences that, when processed by the server, cause the application to attempt reading memory addresses that either do not exist or are not accessible to the current process context.
The operational impact of this vulnerability is classified as high due to the direct consequence of service disruption. When exploited, the memory read access violation causes the SAP MDM Server process to crash and exit unexpectedly, resulting in complete service unavailability for legitimate users and system administrators. This denial of service scenario affects the core availability principle of the CIA triad while maintaining the integrity and confidentiality of the system remain unaffected. The server process termination creates cascading effects that can disrupt business operations relying on master data management services, particularly in enterprise environments where data consistency and availability are paramount.
The exploitation of this vulnerability aligns with ATT&CK technique T1499.004, which covers testing for system and network availability by leveraging denial of service mechanisms. Attackers can systematically send crafted packets to probe and potentially exploit this memory access flaw, leading to repeated service interruptions that can be used as part of broader attack campaigns. The lack of input validation in the ReadString function creates an attack surface that requires immediate attention from security teams responsible for maintaining SAP MDM Server environments.
Mitigation strategies should focus on implementing comprehensive input validation mechanisms within the ReadString function and related string processing components. Organizations should prioritize applying available vendor patches and updates that address the memory access violation in the server process. Network segmentation and access controls can help limit exposure by restricting direct network access to the SAP MDM Server from untrusted networks. Additionally, implementing robust process monitoring and alerting systems can help detect abnormal service termination patterns that may indicate exploitation attempts. The recommended approach includes conducting thorough vulnerability assessments of SAP MDM Server installations and implementing network-based intrusion detection systems to identify and block malicious packet patterns targeting this specific memory access flaw.