CVE-2017-3134 in FortiWLC-SD
Summary
by MITRE
An escalation of privilege vulnerability in Fortinet FortiWLC-SD versions 8.2.4 and below allows attacker to gain root access via the CLI command 'copy running-config'.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 12/25/2020
The vulnerability identified as CVE-2017-3134 represents a critical privilege escalation flaw within Fortinet FortiWLC-SD wireless LAN controller software versions 8.2.4 and earlier. This security weakness specifically targets the command line interface functionality and enables unauthorized attackers to execute malicious commands that result in elevated system privileges. The vulnerability stems from insufficient input validation and access control mechanisms within the device configuration management subsystem, creating a pathway for attackers to bypass normal authentication and authorization protocols.
The technical exploitation of this vulnerability occurs through the specific CLI command 'copy running-config' which should normally be restricted to authorized administrative users with proper credentials. However, the flawed implementation allows attackers to manipulate command parameters or leverage existing system weaknesses to execute this command without proper authentication. This flaw falls under the CWE-264 category of Permissions, Privileges, and Access Controls, specifically addressing inadequate privilege management in network device interfaces. The vulnerability demonstrates a classic improper access control scenario where the system fails to properly validate user credentials or session contexts before executing privileged operations.
The operational impact of this vulnerability extends beyond simple unauthorized access to encompass complete system compromise and potential network infiltration. An attacker who successfully exploits this vulnerability can gain root-level access to the wireless controller, enabling them to modify network configurations, establish persistent backdoors, monitor wireless traffic, and potentially use the compromised device as a pivot point for attacking other network segments. This represents a severe threat to wireless network security as the FortiWLC-SD serves as a central management point for wireless access control and authentication services. The vulnerability aligns with ATT&CK technique T1068 which covers 'Exploitation for Privilege Escalation' and T1566 which covers 'Phishing for Information', as attackers could potentially use this vulnerability to gain initial access and then escalate their privileges to fully control the wireless infrastructure.
Organizations utilizing affected Fortinet FortiWLC-SD versions should immediately implement mitigation strategies including applying the latest firmware updates from Fortinet, which address the privilege escalation flaw through enhanced input validation and access control enforcement. Network administrators should also review and tighten CLI access controls, implement strict user authentication protocols, and monitor system logs for suspicious command execution patterns. The vulnerability demonstrates the importance of maintaining current security patches and the critical need for proper privilege management in network infrastructure devices. Additional defensive measures include network segmentation to limit access to wireless controllers, implementing multi-factor authentication for administrative access, and conducting regular security assessments to identify similar vulnerabilities in network equipment. Organizations should also consider implementing network monitoring solutions that can detect anomalous command execution patterns and alert security teams to potential exploitation attempts.