✨ (CodeQL) Fixed finding: "Uncontrolled command line" #26
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| @@ -230,18 +230,18 @@ | |||
| return render(request, 'mitre/mitre_lab_17.html') | |||
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| def command_out(command): | |||
| process = subprocess.Popen(command, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE) | |||
| process = subprocess.Popen(command, shell=False, stdout=subprocess.PIPE, stderr=subprocess.PIPE) | |||
Check failure
Code scanning / CodeQL
Uncontrolled command line Critical
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Copilot Autofix AI 11 days ago
To fix the problem, we need to ensure that the user-provided input (ip) is properly validated and sanitized before being used in the subprocess.Popen call. The best way to do this is to use a regular expression to validate that the input is a valid IP address. This will prevent any malicious input from being executed as part of the command.
We will add a function to validate the IP address and modify the mitre_lab_17_api function to use this validation before constructing the command variable.
| @@ -231,2 +231,6 @@ | ||
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| def is_valid_ip(ip): | ||
| pattern = re.compile(r"^(?:[0-9]{1,3}\.){3}[0-9]{1,3}$") | ||
| return pattern.match(ip) is not None | ||
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| def command_out(command): | ||
| @@ -240,2 +244,4 @@ | ||
| ip = request.POST.get('ip') | ||
| if not is_valid_ip(ip): | ||
| return JsonResponse({'error': 'Invalid IP address'}, status=400) | ||
| command = ["nmap", ip] |
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I'm confident in this change, but I'm not a maintainer of this project. Do you see any reason not to merge it? If this change was not helpful, or you have suggestions for improvements, please let me know! |
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Just a friendly ping to remind you about this change. If there are concerns about it, we'd love to hear about them! |
✨✨✨
Remediation
This change fixes "Uncontrolled command line" (id = py/command-line-injection) identified by CodeQL.
Details
Command injection vulnerabilities occur when untrusted data is used to construct a command that is executed by the operating system. An attacker can exploit this vulnerability to execute arbitrary commands on the server, potentially leading to unauthorized access, data leakage, or other security breaches.
This change adds controls to prevent command injection vulnerabilities by sanitizing inputs and/or validating user input to ensure that it does not contain any malicious commands. It also ensures that command arguments cannot be used to inject additional commands.
I have additional improvements ready for this repo! If you want to see them, leave the comment:
... and I will open a new PR right away!
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