CVE-2017-11393 in OfficeScan
Summary
by MITRE
Proxy command injection vulnerability in Trend Micro OfficeScan 11 and XG (12) allows remote attackers to execute arbitrary code on vulnerable installations. The specific flaw can be exploited by parsing the tr parameter within Proxy.php. Formerly ZDI-CAN-4543.
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Analysis
by VulDB Data Team • 12/31/2019
The vulnerability identified as CVE-2017-11393 represents a critical command injection flaw within Trend Micro OfficeScan versions 11 and XG (12) that exposes remote attackers to arbitrary code execution capabilities. This security weakness specifically resides in the Proxy.php component where the tr parameter undergoes parsing without adequate input validation or sanitization measures. The flaw allows malicious actors to inject and execute arbitrary commands on affected systems, potentially compromising the entire network infrastructure. The vulnerability was previously catalogued as ZDI-CAN-4543, indicating its recognition by the Zero Day Initiative vulnerability database and highlighting its significance within the cybersecurity community.
The technical implementation of this vulnerability stems from insufficient validation of user-supplied input within the proxy handling mechanism. When the tr parameter is processed in Proxy.php, the application fails to properly sanitize or validate the input before incorporating it into system commands or shell executions. This primitive input handling creates an environment where attackers can manipulate the parameter to inject malicious commands that will be executed with the privileges of the affected service. The vulnerability operates at the application layer and can be exploited through HTTP requests that target the vulnerable proxy functionality, making it particularly dangerous as it requires no authentication and can be triggered remotely.
The operational impact of CVE-2017-11393 extends beyond simple code execution to encompass complete system compromise and potential lateral movement within network environments. Attackers leveraging this vulnerability can gain unauthorized access to sensitive data, escalate privileges, and establish persistent backdoors on compromised systems. The vulnerability affects organizations using Trend Micro OfficeScan products in their security infrastructure, potentially allowing attackers to bypass network security controls and gain access to internal network resources. This makes the vulnerability particularly dangerous in enterprise environments where OfficeScan is commonly deployed as part of endpoint protection strategies, as it could provide attackers with a foothold to conduct more extensive attacks.
Mitigation strategies for this vulnerability should prioritize immediate patching of affected Trend Micro OfficeScan installations to the latest available security updates from the vendor. Organizations should also implement network segmentation and access controls to limit the potential impact of successful exploitation attempts. Security monitoring should be enhanced to detect anomalous proxy traffic patterns and unusual command execution activities. The vulnerability aligns with CWE-77 and CWE-94 categories related to command injection and code injection flaws, and it maps to ATT&CK techniques such as T1059.001 for command and scripting interpreter and T1068 for exploit for privilege escalation. Network administrators should also consider implementing web application firewalls and input validation measures to prevent similar vulnerabilities from being exploited in other applications within their infrastructure.