CVE-2019-0318 in NetWeaver Application Server for Java
Summary
by MITRE
Under certain conditions SAP NetWeaver Application Server for Java (Startup Framework), versions 7.21, 7.22, 7.45, 7.49, and 7.53, allows an attacker to access information which would otherwise be restricted.
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Analysis
by VulDB Data Team • 10/24/2023
The vulnerability identified as CVE-2019-0318 affects SAP NetWeaver Application Server for Java versions 7.21, 7.22, 7.45, 7.49, and 7.53, representing a significant information disclosure flaw within the Startup Framework component. This vulnerability arises from insufficient access controls that permit unauthorized entities to retrieve restricted system information, potentially exposing sensitive data that should remain protected within the application server environment. The issue manifests under specific operational conditions where the system fails to properly enforce authorization checks, creating an avenue for attackers to bypass normal security boundaries and access confidential resources.
The technical implementation of this vulnerability stems from inadequate validation mechanisms within the Startup Framework's information handling processes. Attackers can exploit this weakness by crafting specific requests that leverage the system's failure to properly authenticate or authorize access to restricted information. This flaw operates at the application level and specifically targets the way the SAP NetWeaver platform manages access control for internal system data, potentially allowing unauthorized users to obtain sensitive configuration details, system parameters, or other restricted information that would normally be protected by the platform's security model. The vulnerability aligns with CWE-284, which addresses improper access control issues, and represents a classic example of how insufficient authorization checks can lead to information exposure.
The operational impact of CVE-2019-0318 extends beyond simple information disclosure, as the leaked data could provide attackers with critical insights into the target system's architecture and configuration. This intelligence could subsequently be leveraged to plan more sophisticated attacks, potentially leading to privilege escalation, system compromise, or further exploitation of related vulnerabilities. The affected SAP NetWeaver versions represent widely deployed enterprise applications where such information disclosure could expose sensitive organizational data including system credentials, configuration parameters, or architectural details that would be valuable to threat actors. Security professionals should consider this vulnerability as part of a broader attack surface assessment, particularly when evaluating the security posture of enterprise Java application servers.
Mitigation strategies for this vulnerability should prioritize immediate patch application from SAP, as the vendor has released specific fixes addressing the access control weakness in the Startup Framework. Organizations should also implement network segmentation and access controls to limit exposure of affected systems, while monitoring for suspicious access patterns that might indicate exploitation attempts. Security teams should conduct thorough vulnerability assessments to identify other potential access control issues within their SAP environments, as this vulnerability demonstrates the importance of proper authorization enforcement in enterprise application platforms. Additionally, implementing robust logging and monitoring capabilities around information access patterns can help detect unauthorized attempts to retrieve restricted system data, aligning with ATT&CK technique T1083 for discovering system information and T1068 for exploit for privilege escalation.