CVE-2020-6318 in NetWeaver
Summary
by MITRE
A Remote Code Execution vulnerability exists in the SAP NetWeaver (ABAP Server, up to release 7.40) and ABAP Platform (> release 7.40).Because of this, an attacker can exploit these products via Code Injection, and potentially enabling to take complete control of the products, including viewing, changing, or deleting data by injecting code into the working memory which is subsequently executed by the application. It can also be used to cause a general fault in the product, causing the products to terminate.
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Analysis
by VulDB Data Team • 09/09/2020
The vulnerability described in CVE-2020-6318 represents a critical remote code execution flaw within SAP NetWeaver ABAP Server environments that poses significant operational risks to enterprise systems. This vulnerability affects both legacy ABAP Server versions up to release 7.40 and newer ABAP Platform releases exceeding 7.40, indicating a widespread impact across multiple SAP product lines. The flaw stems from inadequate input validation mechanisms that fail to properly sanitize user-supplied data before processing, creating an avenue for malicious actors to inject arbitrary code into the application's execution environment.
The technical nature of this vulnerability aligns with CWE-94, which describes "Improper Control of Generation of Code ('Code Injection')" as the underlying weakness. Attackers can exploit this weakness by crafting malicious input that gets executed within the application's memory space, effectively bypassing normal security controls and authentication mechanisms. The vulnerability operates at the application layer where ABAP code is processed, making it particularly dangerous as it allows for direct manipulation of the system's operational logic and data handling processes.
From an operational standpoint, the impact of this vulnerability extends beyond simple data compromise to encompass complete system takeover capabilities. An attacker who successfully exploits this vulnerability can execute arbitrary commands with the privileges of the affected application, potentially leading to unauthorized data access, modification, or deletion. The ability to cause general system faults and application termination represents a denial of service component that can disrupt business operations and compromise system availability. This dual nature of the vulnerability makes it particularly attractive to threat actors seeking both data exfiltration and system control.
The exploitation of this vulnerability requires minimal privileges and can be executed remotely, making it highly dangerous in production environments where SAP systems handle sensitive business data. The attack vector typically involves sending specially crafted input through web interfaces or application programming interfaces that are not properly validated, allowing the injected code to execute within the ABAP runtime environment. This vulnerability directly maps to ATT&CK technique T1059.001, "Command and Scripting Interpreter: PowerShell", as it enables attackers to execute system commands and scripts with elevated privileges. Organizations must implement comprehensive mitigation strategies including immediate patch deployment, network segmentation to limit access to SAP systems, and enhanced monitoring of system calls and code execution patterns to detect potential exploitation attempts.
Organizations utilizing SAP NetWeaver ABAP Server environments should prioritize immediate remediation through official SAP security patches, as the vulnerability's exploitability and potential impact make it a high-priority security concern. Additionally, implementing proper input validation controls, disabling unnecessary application features, and establishing robust security monitoring procedures will help reduce the attack surface and improve overall system resilience against similar code injection vulnerabilities. The vulnerability demonstrates the critical importance of maintaining up-to-date security patches and implementing defense-in-depth strategies to protect enterprise applications from sophisticated exploitation techniques.