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HTTP

Component Focus: Chromium's HTTP implementation (net/http), specifically the HttpStreamParser class in net/http/http_stream_parser.cc.

Potential Logic Flaws:

  • Request Handling: Vulnerabilities related to HTTP request parsing, handling, and routing. The SendRequest function in http_stream_parser.cc and its handling of request headers and body, especially in the presence of chunked encoding or a large request body, require careful review.
  • Response Handling: Vulnerabilities related to HTTP response parsing and processing. The FindAndParseResponseHeaders and ParseResponseHeaders functions in http_stream_parser.cc are critical for secure response header parsing.
  • Header Handling: Flaws in HTTP header parsing or handling could lead to security vulnerabilities. The handling of multiple Content-Length headers, Content-Disposition headers, and Location headers in http_stream_parser.cc needs careful analysis.
  • Cookie Management: Vulnerabilities related to HTTP cookie handling, such as improper SameSite attribute enforcement or insecure cookie storage.
  • Chunked Encoding Handling: Improper handling of chunked encoding in http_stream_parser.cc could lead to vulnerabilities. The interaction with the HttpChunkedDecoder requires careful review.
  • Content Length Mismatches: Incorrect handling of content length mismatches or unexpected connection closures in http_stream_parser.cc could lead to vulnerabilities.
  • Connection Reuse: Improper handling of connection reuse in the CanReuseConnection function could lead to security issues.
  • HTTP Authentication: Vulnerabilities related to HTTP authentication, including the handling of authentication challenges and credentials.

Further Analysis and Potential Issues:

  • Review HTTP Implementation: Thoroughly analyze the HTTP implementation in net/http for potential vulnerabilities. Pay close attention to request and response handling, header parsing, and cookie management. Focus on the http_stream_parser.cc file and its key functions, including SendRequest, ReadResponseHeaders, ReadResponseBody, FindAndParseResponseHeaders, ParseResponseHeaders, CalculateResponseBodySize, IsResponseBodyComplete, and CanReuseConnection.
  • Investigate HTTP Tests: Run and analyze existing HTTP tests to identify potential issues or regressions. Develop new tests to cover edge cases and potential vulnerabilities. Focus on tests that exercise request and response parsing, chunked encoding handling, content length handling, and connection reuse.
  • Analyze Security Considerations: Review the security considerations of the HTTP implementation, such as protection against cross-site request forgery (CSRF) attacks, proper header validation, and secure cookie handling. The handling of HTTP/0.9 responses and truncated headers in http_stream_parser.cc requires special attention, especially over HTTPS.
  • HTTP/0.9 and Truncated Headers: The handling of HTTP/0.9 responses and truncated headers in http_stream_parser.cc needs further analysis, especially over HTTPS, to prevent potential security vulnerabilities.
  • Extra Data Handling: The handling of extra data after the end of the response body in http_stream_parser.cc requires further review to ensure secure connection behavior.

Areas Requiring Further Investigation:

  • Interaction with Other Network Components: Investigate how the HTTP implementation interacts with other network components, such as the disk cache, the socket layer, and the QUIC implementation, looking for potential vulnerabilities.
  • Impact of Secure Contexts: Determine how secure contexts affect the HTTP implementation and whether they mitigate any potential vulnerabilities. Consider the implications of HTTP requests and responses across different origins.
  • Chunked Decoder Security: The security implications of the HttpChunkedDecoder used in http_stream_parser.cc require further investigation.
  • Error Handling and Connection Closure: The error handling and connection closure behavior in http_stream_parser.cc need to be thoroughly reviewed to prevent information leakage or denial-of-service vulnerabilities.

Secure Contexts and HTTP:

Secure contexts are crucial for protecting sensitive information transmitted over HTTP. Ensure that HTTP requests and responses are handled securely, especially in cross-origin scenarios.

Privacy Implications:

HTTP vulnerabilities could potentially be exploited to leak information or violate user privacy, so it's important to address any potential privacy implications. Pay close attention to cookie handling and header management to protect user privacy.

Additional Notes:

Files reviewed: net/http/http_stream_parser.cc.