CVE-2016-8769 in UTPS
Summary
by MITRE
Huawei UTPS earlier than UTPS-V200R003B015D16SPC00C983 has an unquoted service path vulnerability which can lead to the truncation of UTPS service query paths. An attacker may put an executable file in the search path of the affected service and obtain elevated privileges after the executable file is executed.
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Analysis
by VulDB Data Team • 04/26/2025
The vulnerability identified as CVE-2016-8769 affects Huawei UTPS (Unified Threat Protection System) versions prior to UTPS-V200R003B015D16SPC00C983, representing a critical security flaw in the service path handling mechanism. This issue falls under the category of unquoted service path vulnerabilities, which are particularly dangerous because they exploit the way operating systems resolve service paths when executing programs. The vulnerability stems from improper handling of service paths that contain spaces, where the system fails to properly quote the path components, creating opportunities for privilege escalation attacks.
The technical flaw manifests when the UTPS service attempts to execute programs from paths that contain spaces without proper quotation. In Windows operating systems, when a service path contains spaces and is not quoted, the system will interpret the path as multiple separate components, with the first component being the executable and subsequent components being arguments. This behavior allows attackers to place malicious executables in directories that appear in the search path before the legitimate service executable, causing the system to execute the malicious file instead of the intended program. The vulnerability specifically impacts the service query path truncation, where the system fails to properly validate or quote the complete path during service execution.
The operational impact of this vulnerability is severe as it provides attackers with a straightforward path to privilege escalation. When an attacker successfully places an executable in the service search path before the legitimate program, any execution of the service will result in the malicious executable being launched with the privileges of the service account. This typically means elevated privileges, often running as SYSTEM or root level access, depending on the operating system and service configuration. The vulnerability can be exploited by attackers who gain access to the system through other means or through network-based attacks, making it a particularly dangerous flaw in enterprise security systems where UTPS is deployed.
Mitigation strategies for CVE-2016-8769 should focus on immediate patching of affected Huawei UTPS versions to the recommended secure build UTPS-V200R003B015D16SPC00C983 or later. Organizations should also implement proper service path quoting practices where all service paths containing spaces are properly quoted to prevent path truncation. The vulnerability aligns with CWE-428, which specifically addresses "Unquoted Service Path" issues, and can be mapped to ATT&CK technique T1068, "Exploitation for Privilege Escalation," as it directly enables attackers to escalate their privileges through service path manipulation. Additional defensive measures include implementing least privilege principles for service accounts, monitoring service execution paths, and conducting regular security audits of service configurations to ensure proper path handling and quoting. System administrators should also consider implementing application whitelisting policies and regular vulnerability assessments to identify and remediate similar path traversal issues across the enterprise infrastructure.