OAuthServer.fetch_request_token() can leak request token secrets.

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The Python example server implements the request token URL using
OAuthServer.fetch_request_token().

If the consumer passes an oauth_token parameter to the request token URL
for a valid request token, fetch_request_token() will return that token
without any signature checking rather than checking the signature and
creating a new token.  The existing token and its secret are then returned
to the consumer.

You might need a bit more information to perform a successful attack, but
leaking this information seems like a problem.  There should probably be
separate methods for use by the "request token" and "authorisation" stages.

Original issue reported on code.google.com by james.he...@gmail.com on 9 Oct 2008 at 7:05

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Original comment by jmkrist...@gmail.com on 22 Oct 2008 at 5:22

• Added labels: Lib-Python
• Removed labels: ****

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Original comment by leah.culver on 14 Jan 2009 at 11:09

• Changed state: Accepted
• Added labels: ****
• Removed labels: ****