CVE-2016-8585 in Threat Discovery Appliance
Summary
by MITRE
admin_sys_time.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 timezone parameter.
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Analysis
by VulDB Data Team • 12/02/2022
The Trend Micro Threat Discovery Appliance represents a critical network security solution designed to provide threat detection and analysis capabilities for enterprise environments. This appliance operates as a centralized security monitoring system that processes and analyzes network traffic to identify potential security threats. The specific vulnerability under examination affects version 2.6.1062r1 and earlier releases of this security appliance, which are widely deployed in corporate networks for threat intelligence gathering and security event correlation. The appliance's administrative interface includes a system time configuration feature that allows authorized administrators to set the appliance's timezone parameter, which is essential for proper log correlation and security event timestamping across distributed network environments.
The technical flaw manifests in the admin_sys_time.cgi web script that handles timezone parameter input from authenticated administrative users. This vulnerability stems from inadequate input validation and sanitization of the timezone parameter, which permits the injection of shell metacharacters. When an authenticated attacker submits maliciously crafted timezone data containing shell metacharacters such as semicolons, ampersands, or command substitution operators, the appliance fails to properly escape or filter these characters before processing them. The vulnerability specifically affects the command execution flow within the CGI script where user input is directly incorporated into system commands without proper sanitization, creating a classic command injection vulnerability that can be exploited by authenticated users with administrative privileges.
The operational impact of this vulnerability is severe and directly compromises the integrity and confidentiality of the affected appliance and potentially the entire network infrastructure it protects. Since the vulnerability allows execution of arbitrary code with root privileges, an authenticated attacker can gain complete control over the appliance, enabling them to modify system configurations, install malicious software, access sensitive data, and potentially use the compromised appliance as a pivot point for further attacks within the network. This represents a critical privilege escalation vulnerability that transforms a legitimate administrative function into a weapon for system compromise, as the appliance's root access provides unrestricted control over network security monitoring capabilities, log data, and threat intelligence processing functions. The vulnerability affects the appliance's ability to maintain its security posture while simultaneously providing attackers with a persistent backdoor into the network infrastructure.
Organizations should immediately implement mitigations including updating to the latest available version of the Trend Micro Threat Discovery Appliance that addresses this vulnerability, which typically involves applying the vendor's security patch or hotfix. Network segmentation and access control measures should be strengthened to limit administrative access to only authorized personnel with legitimate business requirements. The implementation of network monitoring solutions that can detect anomalous command execution patterns and shell metacharacter injection attempts provides additional defense-in-depth layers. Security teams should also conduct thorough vulnerability assessments to identify any potential exploitation attempts and monitor system logs for suspicious activities related to timezone configuration changes. According to the CWE database, this vulnerability maps to CWE-78, which describes improper neutralization of special elements used in OS commands, while ATT&CK framework categorizes this as privilege escalation through command injection techniques. Regular security awareness training for administrators and implementation of principle of least privilege access controls further reduce the attack surface and potential impact of such vulnerabilities.