CVE-2016-8593 in Threat Discovery Appliance
Summary
by MITRE
Directory traversal vulnerability in upload.cgi in Trend Micro Threat Discovery Appliance 2.6.1062r1 and earlier allows remote authenticated users to execute arbitrary code via a .. (dot dot) in the dID parameter.
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 12/02/2022
The vulnerability identified as CVE-2016-8593 represents a critical directory traversal flaw within the Trend Micro Threat Discovery Appliance version 2.6.1062r1 and earlier systems. This weakness resides in the upload.cgi component which processes file upload operations, creating a pathway for malicious actors to manipulate file system access through carefully crafted input parameters. The vulnerability specifically manifests when the dID parameter contains directory traversal sequences such as .. (dot dot) which allows attackers to navigate beyond the intended upload directory structure.
This directory traversal vulnerability operates under CWE-22 which categorizes improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal attacks. The flaw enables authenticated remote attackers to bypass normal file system access controls and potentially execute arbitrary code on the affected appliance. The exploitation requires successful authentication to the system, meaning an attacker must first obtain valid credentials before leveraging this vulnerability to escalate privileges and gain unauthorized access to system resources.
The operational impact of CVE-2016-8593 extends beyond simple file access violations as it provides a potential gateway for complete system compromise. Attackers can leverage this vulnerability to upload malicious files, execute arbitrary code, and potentially establish persistent backdoors within the network infrastructure. The Trend Micro Threat Discovery Appliance serves as a critical security component in enterprise environments, making this vulnerability particularly dangerous as it could allow adversaries to undermine the very security controls designed to protect against threats. The attack vector requires remote access and authentication, which aligns with ATT&CK technique T1078 for valid accounts and T1059 for command and scripting interpreter.
Mitigation strategies for this vulnerability should focus on immediate patching of the Trend Micro Threat Discovery Appliance to version 2.6.1063r1 or later which contains the necessary security fixes. Organizations should also implement network segmentation and access controls to limit exposure of the appliance to untrusted networks. Additional defensive measures include monitoring for unusual file upload patterns, implementing web application firewalls to detect and block malicious directory traversal attempts, and conducting regular security assessments of network security appliances. The vulnerability demonstrates the importance of proper input validation and parameter sanitization in web applications, particularly those handling file operations and user-supplied data. Organizations should also review their authentication policies and ensure that privileged accounts are protected with strong authentication mechanisms to prevent unauthorized access to critical security infrastructure components.