CVE-2020-6261 in Solution Manager
Summary
by MITRE
SAP Solution Manager (Trace Analysis), version 7.20, allows an attacker to perform a log injection into the trace file, due to Incomplete XML Validation. The readability of the trace file is impaired.
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Analysis
by VulDB Data Team • 10/28/2020
SAP Solution Manager Trace Analysis component version 7.20 contains a critical vulnerability classified as incomplete XML validation that enables remote attackers to inject malicious log entries into trace files. This vulnerability resides in the application's insufficient validation mechanisms for XML input data, allowing crafted XML payloads to bypass security controls and modify trace file contents. The flaw specifically affects the trace analysis functionality within SAP Solution Manager, which is designed to monitor and analyze system operations through detailed logging processes. When XML data is processed without proper validation, attackers can manipulate the input to inject arbitrary log entries that will be persisted in the trace files.
The technical implementation of this vulnerability stems from the application's failure to properly sanitize XML input before processing. According to CWE-20, this represents a classic input validation flaw where the system does not adequately validate or sanitize external input data. The incomplete XML validation allows attackers to craft XML documents containing malicious content that gets interpreted and written to trace files without proper sanitization. This creates a persistent threat vector where malicious log entries can be injected and potentially exploited by unauthorized parties. The vulnerability specifically impacts the trace analysis module, which is critical for system monitoring and troubleshooting operations within SAP environments.
The operational impact of this vulnerability extends beyond simple log manipulation, as it can compromise the integrity and reliability of system monitoring data. When trace files become corrupted with injected content, system administrators lose confidence in the accuracy of diagnostic information, potentially leading to misdiagnosis of actual system issues. The impaired readability of trace files makes it difficult for security teams to perform effective incident response and forensic analysis. This vulnerability can be exploited to hide malicious activities within legitimate system logs, making detection more challenging. From an ATT&CK framework perspective, this vulnerability maps to T1070.004 (Indicator Removal on Host: File Deletion) and T1059.001 (Command and Scripting Interpreter: Visual Basic) as attackers can manipulate log files to obscure their activities or inject malicious commands that appear legitimate within the trace analysis context.
Mitigation strategies for this vulnerability require immediate attention from SAP Solution Manager administrators. The primary recommendation involves applying the latest security patches provided by SAP to address the incomplete XML validation issue. Organizations should also implement strict input validation controls and sanitize all XML data before processing to prevent injection attacks. Network segmentation and access controls should be enforced to limit exposure of the trace analysis functionality to authorized personnel only. Additionally, regular monitoring and auditing of trace files should be implemented to detect any unauthorized modifications. Security teams should consider implementing automated log integrity checking mechanisms that can identify suspicious patterns or injected content within trace files. The vulnerability highlights the importance of maintaining robust input validation processes and adhering to secure coding practices that prevent XML external entity (XXE) injection attacks. Organizations should also conduct regular security assessments of their SAP environments to identify similar validation gaps that could lead to similar vulnerabilities in other components.