CVE-2018-13353 in TerraMaster TOS
Summary
by MITRE
System command injection in ajaxdata.php in TerraMaster TOS version 3.1.03 allows attackers to execute commands via the "checkport" parameter.
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Analysis
by VulDB Data Team • 08/09/2024
The vulnerability identified as CVE-2018-13353 represents a critical system command injection flaw within TerraMaster TOS version 3.1.03, specifically affecting the ajaxdata.php component. This vulnerability arises from inadequate input validation and sanitization mechanisms that fail to properly filter user-supplied data before incorporating it into system commands. The "checkport" parameter serves as the attack vector where malicious inputs can be injected and subsequently executed with the privileges of the web application, potentially leading to complete system compromise.
The technical nature of this vulnerability aligns with CWE-77 which describes improper neutralization of special elements used in system commands, and CWE-94 which covers improper control of generation of code. The flaw exists in the web application's handling of network port checking functionality where the application directly incorporates user input into system command execution without proper sanitization. This creates an environment where attackers can inject arbitrary commands that will be interpreted and executed by the underlying operating system, effectively allowing for remote code execution.
From an operational impact perspective, this vulnerability exposes systems running TerraMaster TOS 3.1.03 to severe security risks including unauthorized access, data theft, system takeover, and potential lateral movement within network environments. The attack surface is particularly concerning as it allows for remote exploitation without authentication requirements, making it highly attractive to threat actors. The vulnerability can be leveraged to establish persistent backdoors, exfiltrate sensitive data, or deploy additional malicious payloads, all while remaining隐蔽 and difficult to detect through conventional monitoring mechanisms.
The attack pattern associated with this vulnerability follows the ATT&CK framework's technique T1059.001 for command and scripting interpreter, specifically targeting remote code execution through web application interfaces. This allows adversaries to execute commands on the target system with the privileges of the web server process, potentially escalating to system-level access. The vulnerability's exploitation typically involves crafting malicious payloads that exploit the command injection flaw, often through HTTP requests containing specially formatted parameters that bypass input validation.
Organizations should immediately implement mitigations including upgrading to patched versions of TerraMaster TOS, implementing web application firewalls to filter suspicious input patterns, and conducting thorough network segmentation to limit lateral movement. Input validation should be strengthened to reject special characters and command delimiters, while output encoding should be implemented to prevent malicious payloads from being executed. Additionally, privileged access controls should be enforced, and regular security audits should be performed to identify similar vulnerabilities in other components of the system. The remediation process should also include network monitoring to detect anomalous command execution patterns and implementing least privilege principles for web application services to minimize potential impact from successful exploitation attempts.