CVE-2016-8921 in FileNet Workplace XT
Summary
by MITRE
IBM FileNet WorkPlace XT could allow a remote attacker to upload arbitrary files, which could allow the attacker to execute arbitrary code on the vulnerable server.
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Analysis
by VulDB Data Team • 08/09/2020
IBM FileNet Workplace XT contains a critical file upload vulnerability that enables remote code execution through unauthorized file uploads. This vulnerability stems from insufficient input validation and access control mechanisms within the application's file handling processes. The flaw exists in the web application's ability to process user-supplied file uploads without proper sanitization, allowing attackers to bypass security restrictions and upload malicious payloads directly to the server filesystem.
The technical implementation of this vulnerability involves the application's failure to properly validate file types, extensions, and content during the upload process. Attackers can exploit this by crafting specially formatted files that appear legitimate but contain malicious code or scripts. The vulnerability is particularly dangerous because it allows arbitrary file execution, meaning that uploaded files can be directly executed by the server without proper authorization checks. This creates a pathway for attackers to establish persistent access to the system and potentially escalate privileges within the network environment.
The operational impact of this vulnerability extends beyond simple code execution, as it provides attackers with a foothold for further exploitation within the enterprise network. Once an attacker successfully uploads and executes malicious code, they can leverage the compromised system to perform reconnaissance activities, establish command and control channels, or move laterally across the network infrastructure. The vulnerability affects the integrity and availability of the FileNet Workplace XT environment, potentially leading to data breaches, system compromise, and denial of service conditions that can severely impact business operations and regulatory compliance.
Organizations should implement immediate mitigations including restricting file upload capabilities, implementing strict file type validation, and deploying web application firewalls to monitor and filter suspicious upload attempts. The vulnerability aligns with CWE-434, which describes insecure file upload vulnerabilities where applications accept files without proper validation. From an ATT&CK framework perspective, this vulnerability maps to T1190 for Exploit Public-Facing Application and T1059 for Command and Scripting Interpreter, as attackers can leverage the upload functionality to execute malicious code and maintain persistent access. Additional protective measures include implementing proper access controls, regular security assessments, and ensuring that all system components are patched according to vendor security advisories.