CVE-2016-6140 in TREX
Summary
by MITRE
SAP TREX 7.10 Revision 63 allows remote attackers to write to arbitrary files via vectors related to RFC-Gateway, aka SAP Security Note 2203591.
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Analysis
by VulDB Data Team • 09/13/2022
SAP TREX 7.10 Revision 63 contains a critical file write vulnerability that enables remote attackers to execute arbitrary file operations through the RFC-Gateway component. This vulnerability represents a significant security flaw in SAP's enterprise search and data integration platform, which is widely deployed across enterprise environments for business intelligence and data processing tasks. The issue stems from insufficient input validation and access control mechanisms within the RFC-Gateway service that handles remote function calls between SAP systems and external applications.
The technical flaw manifests when the RFC-Gateway component processes incoming requests without adequate sanitization of file path parameters. Attackers can exploit this weakness by crafting malicious RFC calls that specify arbitrary file paths for writing operations, potentially allowing them to overwrite critical system files, inject malicious code, or establish persistent access points within the target environment. This vulnerability specifically affects the TREX search engine component that is integrated into SAP NetWeaver platforms, making it particularly dangerous for organizations that rely on SAP enterprise solutions for their core business operations.
The operational impact of this vulnerability extends beyond simple unauthorized file writes, as it provides attackers with a potential foothold for further exploitation within the SAP ecosystem. Once an attacker successfully exploits this vulnerability, they can manipulate the TREX service to execute arbitrary code, potentially leading to complete system compromise. The attack surface is particularly concerning given that TREX is often deployed in enterprise environments where it may have elevated privileges and access to sensitive business data. This vulnerability aligns with CWE-22, which describes improper limitation of a pathname to a restricted directory, and represents a classic path traversal attack vector.
Organizations affected by this vulnerability should immediately implement the security patches provided in SAP Security Note 2203591, which addresses the underlying RFC-Gateway file write issues. Network segmentation and firewall rules should be implemented to restrict access to the RFC-Gateway ports, limiting exposure to trusted networks only. Additionally, monitoring should be enhanced to detect unusual file write activities and unauthorized access attempts to the TREX service components. From an ATT&CK framework perspective, this vulnerability maps to techniques involving exploitation of remote services and privilege escalation, with potential lateral movement opportunities through compromised TREX components. The vulnerability demonstrates the importance of proper input validation and access control mechanisms in enterprise software components that handle external communications and file operations.