CVE-2016-6137 in TREX
Summary
by MITRE
An unspecified function in SAP TREX 7.10 Revision 63 allows remote attackers to execute arbitrary OS commands via unknown vectors, aka SAP Security Note 2203591.
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Analysis
by VulDB Data Team • 04/27/2019
The vulnerability identified as CVE-2016-6137 affects SAP TREX 7.10 Revision 63, a component within the SAP NetWeaver platform that serves as a search engine and data processing framework. This issue represents a critical remote code execution flaw that enables attackers to execute arbitrary operating system commands on the affected system. The vulnerability stems from an unspecified function within the TREX component that fails to properly validate or sanitize input parameters, creating a pathway for malicious command injection attacks.
The technical flaw manifests through improper input handling within the SAP TREX search functionality, where user-supplied data is not adequately filtered or escaped before being processed by underlying operating system commands. This type of vulnerability falls under the CWE-77 category, which specifically addresses Command Injection flaws in software systems. Attackers can exploit this weakness by crafting malicious input that gets interpreted as system commands rather than data, allowing them to execute arbitrary code with the privileges of the affected service account. The vulnerability is particularly dangerous because it operates at the operating system level, potentially enabling attackers to gain full system control.
The operational impact of CVE-2016-6137 extends beyond simple command execution, as it represents a complete compromise of the affected SAP system's security posture. Successful exploitation allows attackers to perform actions such as installing malware, modifying system configurations, accessing sensitive data, and establishing persistent backdoors. The vulnerability affects organizations running SAP TREX 7.10 Revision 63, which typically serves as a backend component for enterprise search capabilities, making it a prime target for attackers seeking to access corporate data repositories. The remote nature of the attack means that exploitation can occur from anywhere on the internet without requiring physical access to the network, significantly increasing the attack surface and potential impact.
Organizations should implement immediate mitigations including applying the official SAP security patch referenced in SAP Security Note 2203591, which addresses the underlying command injection vulnerability. Network segmentation and firewall rules should be implemented to restrict access to TREX components, particularly limiting exposure to trusted internal networks only. The ATT&CK framework categorizes this vulnerability under T1059 - Command and Scripting Interpreter, as attackers can leverage the compromised system to execute various commands and scripts. Additional defensive measures include implementing robust input validation, monitoring for unusual command execution patterns, and conducting regular security assessments of SAP environments. System administrators should also consider disabling unnecessary TREX services and implementing principle of least privilege access controls to minimize potential damage from successful exploitation attempts.