Create ssrf.py

[varunsh-coder]

This vulnerable code is from the Semgrep registry.

[step-security-bot]

Please find StepSecurity AI-CodeWise code comments below.

Code Comments

ssrf.py

• [High]Avoid using user-specified input in network requests
  The code creates an SSRF vulnerability by incorporating user-supplied input into a network request. Attackers can exploit SSRF vulnerabilities to send requests to internal websites, interact with intranet systems, scan internal ports, and read files. Filter user-supplied input to ensure that it is safe to use in a network request or whitelist the allowed values.
• [High]Use allowlist of safe URLs for outbound network requests
  The code invokes request.get to make an outbound network request that may connect to an unexpected remote server. An attacker can exploit this weakness to send requests to internal websites, interact with intranet systems, scan internal ports, and read files. Create a list of allowed domains and IP addresses and compare the requested URL against the allowlist to ensure that it is safe to use in a network request.
• [Medium]Validate all input before using it
  The code processes user-supplied input without validating its safety. To prevent attacks, you should whitelist or validate user-controlled inputs based on implementation-specific criteria such as length or character type. Validate user input to ensure it only contains alphanumeric characters or only accept input that matches specific patterns.
• [Medium]Add a timeout for network requests
  Timeouts provide an upper bound on how long a blocking operation may take. This code makes a network request without defining a timeout. It may cause the program to hang if the endpoint doesn't respond within a timely manner. Add a timeout parameter to the request, specifying a value that is appropriate for the expected network latency
• [Low]Distinguish between input and output variables
  Variable names used in the code might be misleading. From review, it's not clear what are input and output variables. This may cause confusion and prevent developers from catching errors in the further code changes. Adopt a naming convention that reflects the variable's purpose, akin to input_param and output_param.

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