CVE-2016-6147 in TREX
Summary
by MITRE
An unspecified interface in SAP TREX 7.10 Revision 63 allows remote attackers to execute arbitrary OS commands with SIDadm privileges via unspecified vectors, aka SAP Security Note 2234226.
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Analysis
by VulDB Data Team • 03/22/2019
The vulnerability identified as CVE-2016-6147 resides within SAP TREX 7.10 Revision 63, a component of SAP's enterprise software ecosystem that serves as a search engine for SAP systems. This flaw represents a critical remote code execution vulnerability that enables attackers to gain unauthorized access to operating system commands with elevated privileges associated with the SIDadm user account. The unspecified interface in question likely pertains to web-based or network-facing components that process user input without adequate validation or sanitization mechanisms. The vulnerability's classification as a remote code execution flaw indicates that attackers can exploit this weakness from external network positions without requiring physical access to the system, making it particularly dangerous for enterprise environments where SAP systems are deployed. The security implications extend beyond simple command execution as the privilege level of SIDadm provides access to system-level operations that could compromise entire SAP landscapes.
The technical exploitation of this vulnerability occurs through unspecified vectors that typically involve injection attacks targeting the vulnerable interface. Attackers can craft malicious input that gets processed by the TREX component and subsequently executed as operating system commands on the underlying host system. This type of vulnerability falls under the category of command injection flaws as defined by CWE-77, which specifically addresses situations where user-supplied data is directly incorporated into system commands without proper validation or escaping. The attack vector likely involves HTTP request parameters, API calls, or other network interfaces that the TREX component uses to communicate with external systems. The fact that the vulnerability allows execution with SIDadm privileges indicates that the system's privilege separation mechanisms have been bypassed, potentially enabling attackers to access sensitive system resources, modify configurations, or escalate their privileges further within the SAP environment.
The operational impact of CVE-2016-6147 extends far beyond immediate system compromise, as SAP TREX components are integral to enterprise search functionality within SAP landscapes. Organizations that fail to patch this vulnerability risk complete system compromise, data breaches, and potential regulatory violations. The SIDadm user account typically possesses significant system privileges including access to system configuration files, database connections, and administrative functions that could be leveraged to establish persistent access or conduct lateral movement within the network. This vulnerability directly aligns with ATT&CK technique T1059.001 for command and scripting interpreter, where adversaries execute code through operating system interfaces. The impact is particularly severe for enterprises using SAP systems for critical business operations, as compromise of TREX components could affect search functionality across entire enterprise applications, potentially leading to data exposure or operational disruption that affects business continuity.
Organizations should implement immediate mitigations including applying SAP security note 2234226 which provides the necessary patches and configuration changes to address this vulnerability. Network segmentation should be implemented to restrict access to SAP TREX components, particularly limiting exposure to trusted networks only. Input validation and sanitization measures should be enhanced at all interfaces that interact with the TREX component, following principles outlined in the OWASP Top Ten and CWE guidelines for preventing injection attacks. Regular security assessments and penetration testing should be conducted to identify similar vulnerabilities within the SAP landscape. Monitoring for suspicious command execution patterns and anomalous network traffic related to SAP components should be implemented as part of the overall security operations center procedures. The vulnerability demonstrates the importance of maintaining up-to-date security patches and following the principle of least privilege when configuring SAP system accounts, as the SIDadm account should only possess necessary privileges for its operational requirements. Additionally, organizations should consider implementing application whitelisting solutions to prevent unauthorized execution of command-line utilities that could be leveraged by attackers exploiting this vulnerability.