fix: Guard response usage in validate_credentials#288
fix: Guard response usage in validate_credentials#288Blackoutta wants to merge 1 commit intolanggenius:mainfrom
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Summary of ChangesHello, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed! This pull request enhances the error handling within the 'validate_credentials' function to prevent 'UnboundLocalError' when network requests fail. By ensuring the 'response' object is always initialized and safely accessed, it improves the clarity and reliability of error messages, allowing the true cause of credential validation failures to be surfaced without masking issues with secondary exceptions. Highlights
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Code Review
The pull request effectively addresses a potential UnboundLocalError in the validate_credentials method by ensuring the response variable is always initialized and safely accessed within exception handlers, and improves error categorization with a specific requests.RequestException handler. However, it preserves and reinforces a critical security vulnerability: the inclusion of raw response bodies from user-controlled endpoints in exception messages. This facilitates data exfiltration in Server-Side Request Forgery (SSRF) attacks, and the error handling logic should be refined to prevent leaking sensitive information.
| except Exception as ex: | ||
| response_body = response.text if response is not None else "<no response>" | ||
| raise CredentialsValidateFailedError( | ||
| f"An error occurred during credentials validation: {ex!s}, response body {response.text}" | ||
| f"An error occurred during credentials validation: {ex!s}, " | ||
| f"response body {response_body}" | ||
| ) from ex |
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While the conditional assignment to response_body correctly prevents an UnboundLocalError, including the raw response body in error messages creates a critical Server-Side Request Forgery (SSRF) vulnerability. Since the endpoint_url is user-supplied, an attacker can exfiltrate sensitive data from internal services by providing a malicious URL and reading the response in the error message. To remediate, avoid including the full response body in error messages or strictly validate endpoint_url against an allow-list and block internal IP ranges.
| :param credentials: model credentials | ||
| :return: | ||
| """ | ||
| response = None |
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Initializing response = None is a crucial improvement. It prevents UnboundLocalError in scenarios where requests.post might raise an exception before response is assigned, ensuring that the variable is always defined when accessed in the except blocks.
| except requests.RequestException as ex: | ||
| raise CredentialsValidateFailedError( | ||
| f"Credentials validation request failed: {ex!s}" | ||
| ) from ex |
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Adding a specific except requests.RequestException handler is a good practice. It allows for more granular error handling for network-related issues, providing a clearer error message to the user compared to a generic Exception. This improves the diagnostic capabilities of the system.
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Summary
Prevent
UnboundLocalErrorby ensuringresponseis defined before referencingresponse.textin error handling.Fixes #287
Changes
response = Noneat the start ofvalidate_credentials.responseis unavailable.CredentialsValidateFailedErrorwithout secondary errors.Why
requests.post(...)can raise beforeresponseis assigned. The previous error handler referencedresponse.textunconditionally, which causedUnboundLocalErrorand masked the real failure. This change preserves the root exception and avoids cascading errors.Testing
Before Change
real error is masked by UnboundLocalError
After Change
real error is displayed properly
