CVE-2016-8588 in Threat Discovery Appliance
Summary
by MITRE
The hotfix_upload.cgi in Trend Micro Threat Discovery Appliance 2.6.1062r1 and earlier allows remote authenticated users to execute arbitrary code via shell metacharacters in the file name of an uploaded file.
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Analysis
by VulDB Data Team • 12/02/2022
The vulnerability identified as CVE-2016-8588 affects the Trend Micro Threat Discovery Appliance version 2.6.1062r1 and earlier systems, representing a critical security flaw in the appliance's file upload handling mechanism. This issue resides within the hotfix_upload.cgi component which processes firmware updates and hotfixes for the threat detection appliance. The vulnerability stems from inadequate input validation and sanitization of file names during the upload process, creating a path for malicious actors to exploit the system through crafted file names containing shell metacharacters.
The technical exploitation of this vulnerability occurs when authenticated users submit files for upload through the web interface, specifically targeting the hotfix_upload.cgi script. When the system processes these file names without proper sanitization, it fails to properly escape or validate shell metacharacters such as semicolons, ampersands, or command substitution operators. This allows attackers to inject malicious commands that get executed within the context of the web server process, potentially leading to complete system compromise. The vulnerability is classified as a command injection flaw under CWE-77 and aligns with ATT&CK technique T1059.001 for command and script injection.
The operational impact of this vulnerability extends beyond simple code execution, as it provides attackers with elevated privileges within the appliance's operating environment. Successful exploitation could enable attackers to gain full administrative control over the threat detection appliance, potentially allowing them to modify security policies, disable threat detection capabilities, or exfiltrate sensitive network data. The appliance serves as a critical security component in enterprise networks, making this vulnerability particularly dangerous as it could be used to undermine the entire security infrastructure. Organizations relying on this appliance for network threat detection and analysis face significant risk of undetected malicious activity if this vulnerability remains unpatched.
Mitigation strategies for CVE-2016-8588 should prioritize immediate patching of affected Trend Micro Threat Discovery Appliance versions, with administrators verifying that the installed firmware includes the security fixes provided by Trend Micro. Additional protective measures include implementing network segmentation to limit access to the appliance to authorized personnel only, enforcing strict access controls and authentication mechanisms, and monitoring for suspicious file upload activities. Security teams should also consider implementing web application firewalls to detect and block malicious file name patterns and establish comprehensive logging of all file upload operations for forensic analysis. The vulnerability demonstrates the critical importance of proper input validation in web applications and serves as a reminder of the potential consequences when such security controls are insufficiently implemented.