CVE-2023-35871 in Web Dispatcher
Summary
by MITRE • 07/11/2023
The SAP Web Dispatcher - versions WEBDISP 7.53, WEBDISP 7.54, WEBDISP 7.77, WEBDISP 7.85, WEBDISP 7.89, WEBDISP 7.91, WEBDISP 7.92, WEBDISP 7.93, KERNEL 7.53, KERNEL 7.54 KERNEL 7.77, KERNEL 7.85, KERNEL 7.89, KERNEL 7.91, KERNEL 7.92, KERNEL 7.93, KRNL64UC 7.53, HDB 2.00, XS_ADVANCED_RUNTIME 1.00, SAP_EXTENDED_APP_SERVICES 1, has a vulnerability that can be exploited by an unauthenticated attacker to cause memory corruption through logical errors in memory management this may leads to information disclosure or system crashes, which can have low impact on confidentiality and high impact on the integrity and availability of the system.
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Analysis
by VulDB Data Team • 07/27/2023
The vulnerability identified as CVE-2023-35871 affects SAP Web Dispatcher components across multiple version releases including WEBDISP 7.53 through 7.93 and associated kernel versions. This weakness resides in the memory management subsystem of the SAP Web Dispatcher, specifically manifesting through logical errors that can be exploited by unauthenticated attackers. The affected systems include various SAP product lines such as SAP Extended Application Services, HANA Database 2.00, and XS Advanced Runtime 1.00, indicating a broad impact across SAP's application infrastructure landscape. The vulnerability represents a critical concern for enterprise security environments where SAP systems serve as foundational components for business operations.
The technical flaw manifests as memory corruption vulnerabilities stemming from improper handling of memory allocation and deallocation processes within the Web Dispatcher's runtime environment. Attackers can exploit these logical errors without requiring authentication credentials, making the attack surface particularly dangerous for systems that are publicly accessible or exposed to untrusted networks. The memory management errors typically involve improper pointer handling, buffer overflows, or use-after-free conditions that can be triggered through carefully crafted requests to the Web Dispatcher service. These conditions create opportunities for attackers to manipulate memory contents, potentially leading to arbitrary code execution or system instability.
The operational impact of this vulnerability extends across multiple security domains with low confidentiality impact but high integrity and availability consequences. While the vulnerability may not directly enable unauthorized data access, the potential for system crashes and memory corruption can severely disrupt business operations and compromise system stability. The integrity impact is particularly concerning as attackers could manipulate system behavior through memory corruption, potentially leading to data manipulation or service disruption. Availability is significantly compromised as the memory corruption can cause system crashes, forcing service interruptions that can impact business continuity and customer access to SAP applications. This vulnerability aligns with CWE-125 (Out-of-bounds Read) and CWE-787 (Out-of-bounds Write) classifications under the Common Weakness Enumeration framework, representing memory safety issues that have been historically challenging to detect and prevent.
Organizations should implement immediate mitigations including applying the latest SAP security patches and updates released through SAP Security Notes. Network segmentation and access controls should be strengthened to limit exposure of SAP Web Dispatcher components to untrusted networks. Monitoring should be enhanced to detect anomalous behavior patterns that might indicate exploitation attempts. The ATT&CK framework categorizes this vulnerability under T1190 (Exploit Public-Facing Application) and T1499 (Endpoint Termination) with potential lateral movement opportunities through system instability. Regular security assessments and vulnerability scanning should be conducted to identify similar memory management issues in other SAP components and third-party applications. System administrators should also consider implementing intrusion detection systems and log analysis tools to monitor for exploitation attempts targeting these specific memory corruption vulnerabilities in SAP environments.