CVE-2016-8589 in Threat Discovery Appliance
Summary
by MITRE
log_query_dae.cgi in Trend Micro Threat Discovery Appliance 2.6.1062r1 and earlier allows remote authenticated users to execute arbitrary code as the root user via shell metacharacters in the cache_id parameter.
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Analysis
by VulDB Data Team • 12/02/2022
The vulnerability identified as CVE-2016-8589 affects the Trend Micro Threat Discovery Appliance version 2.6.1062r1 and earlier systems, representing a critical remote code execution flaw that exploits improper input validation within the log_query_dae.cgi component. This vulnerability exists in the web-based management interface of the appliance, which is designed to monitor and analyze network traffic for potential threats. The flaw specifically targets the cache_id parameter within the log_query_dae.cgi script, which processes user-supplied input without adequate sanitization or validation mechanisms. Security researchers have classified this as a command injection vulnerability that enables attackers to execute arbitrary system commands with the highest privileges available on the target system.
The technical exploitation of this vulnerability occurs through the manipulation of the cache_id parameter in the log_query_dae.cgi script, where maliciously crafted input containing shell metacharacters can be passed to the system. When the appliance processes this parameter, it fails to properly escape or filter special characters that have meaning in shell contexts, such as semicolons, ampersands, or command substitution operators. This allows authenticated attackers to inject and execute arbitrary shell commands directly on the appliance's operating system, effectively granting them root-level access to the entire system. The vulnerability is particularly dangerous because it requires only authenticated access, meaning that an attacker who has obtained valid credentials for the appliance can immediately escalate their privileges and gain complete control over the device.
The operational impact of this vulnerability extends beyond simple unauthorized access, as it fundamentally compromises the security posture of organizations relying on Trend Micro Threat Discovery Appliance for network monitoring and threat detection. Once an attacker achieves root-level access, they can manipulate the appliance's logging and monitoring capabilities, potentially creating backdoors, exfiltrating sensitive data, or disabling security features that protect the network infrastructure. The appliance's role as a central point for threat analysis makes it a highly valuable target, as compromising it can provide attackers with access to critical network traffic data and potentially enable them to evade detection while maintaining persistent access to the environment. This vulnerability directly aligns with CWE-77 and CWE-94 categories, which address command injection and code injection flaws respectively, and maps to several ATT&CK techniques including privilege escalation and execution through command and scripting interpreter.
Organizations affected by this vulnerability should immediately implement mitigations including updating to the latest firmware version released by Trend Micro, which contains proper input validation and sanitization for the affected component. Network segmentation and access controls should be strengthened to limit the number of valid credentials available to potential attackers, while monitoring systems should be configured to detect unusual command execution patterns or unauthorized access attempts. The appliance should be configured with minimal necessary privileges and access restrictions, and administrators should implement robust credential management practices including regular password changes and multi-factor authentication where possible. Additionally, organizations should conduct comprehensive security assessments of their network monitoring infrastructure to identify other potential vulnerabilities and ensure that all security patches are applied promptly to maintain the integrity of their threat detection capabilities.