Argument Injection in GitHub repository froxlor/froxlor prior to 2.0.0-beta1.
Froxlor, a web hosting control panel, is vulnerable to argument injection, allowing attackers to execute arbitrary commands on the server. This critical vulnerability can lead to complete system compromise, enabling attackers to steal sensitive data, install malware, and control the affected server infrastructure. Successful exploitation requires no prior authentication, making this a high-priority threat.
Step 1: Input Submission: The attacker identifies an input field within Froxlor that is used to pass arguments to system commands. This could be a field related to domain management, user creation, or other administrative functions.
Step 2: Payload Injection: The attacker crafts a malicious payload that includes the intended command to be executed, along with any necessary arguments. This payload is injected into the identified input field.
Step 3: Command Execution: The Froxlor application processes the user-supplied input. Due to the lack of proper sanitization, the injected payload is concatenated with the existing command, forming a new command string.
Step 4: System Command Execution: The application executes the crafted command string on the server. The attacker's injected command is executed with the privileges of the Froxlor process, which may have elevated permissions.
Step 5: System Compromise: The attacker's command executes, potentially leading to data exfiltration, malware installation, or complete server control.
The vulnerability stems from improper sanitization and validation of user-supplied input within the Froxlor application. Specifically, the software fails to adequately sanitize arguments passed to system commands, allowing an attacker to inject malicious commands. This is a classic example of an argument injection vulnerability, where user-controlled data is directly incorporated into a command string without proper escaping or filtering. The root cause lies in the flawed implementation of functions that handle user input and subsequently execute system commands, leading to the execution of attacker-controlled commands.