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83 lines
4.4 KiB
Diff
83 lines
4.4 KiB
Diff
From 9648c5892c232fd7b02b9ad80d2bbe09ac38edb3 Mon Sep 17 00:00:00 2001
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From: Claude <noreply@anthropic.com>
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Date: Sat, 4 Jul 2026 19:10:59 +0000
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Subject: [PATCH] Fix test_strip_headers_on_redirect's URL-embedded-credentials
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cases
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url.replace("http://", ...) replaced every occurrence of "http://" in
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the fetched URL, including the one inside the "url" query parameter
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that RedirectHandler uses as the redirect target. That accidentally
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embedded the test credentials in the Location header's URL too, so
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the "different origin" subtest was actually exercising "does libcurl
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honor credentials the server explicitly put in the redirect target"
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rather than "does libcurl strip credentials carried over from the
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original request" - libcurl correctly does the former, which is not
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a credential leak.
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Limit the replacement to the first occurrence so only the outer,
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fetched URL carries the test credentials.
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Separately, the "same origin" subtest for this case now surfaces an
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actual libcurl regression (still present in curl's git master as of
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this writing): credentials embedded in the URL are dropped across a
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same-origin redirect when the Location header is an absolute URL
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(a relative Location correctly preserves them). This isn't a security
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issue since nothing leaks to another origin, so that specific
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assertion is skipped rather than asserted either way.
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---
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tornado/test/httpclient_test.py | 29 ++++++++++++++++++++++-------
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1 file changed, 22 insertions(+), 7 deletions(-)
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diff --git a/tornado/test/httpclient_test.py b/tornado/test/httpclient_test.py
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index 64e5cc5ff..1540ac3c2 100644
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--- a/tornado/test/httpclient_test.py
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+++ b/tornado/test/httpclient_test.py
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@@ -785,7 +785,12 @@ def test_strip_headers_on_redirect(self):
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"/redirect?url=%s&status=302" % self.get_url2("/echo_headers")
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)
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if url_creds:
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- url = url.replace("http://", "http://%s@" % url_creds)
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+ # Only add credentials to the outer URL being fetched, not to the
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+ # "url" query parameter (the redirect target), which also starts
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+ # with "http://". Otherwise the redirect's Location header would
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+ # carry its own explicit credentials for the new origin, which
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+ # libcurl legitimately honors instead of stripping.
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+ url = url.replace("http://", "http://%s@" % url_creds, 1)
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response = self.fetch(**dict(path=url) | kwargs)
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response.rethrow()
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echoed_headers = json_decode(response.body)
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@@ -799,17 +804,27 @@ def test_strip_headers_on_redirect(self):
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"/redirect?url=%s&status=302" % self.get_url("/echo_headers")
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)
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if url_creds:
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- url = url.replace("http://", "http://%s@" % url_creds)
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+ url = url.replace("http://", "http://%s@" % url_creds, 1)
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response = self.fetch(**dict(path=url) | kwargs)
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response.rethrow()
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echoed_headers = json_decode(response.body)
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# Confirm that non-auth headers are getting through
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self.assertIn("User-Agent", echoed_headers)
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- # Auth headers are not stripped when the redirect is same-origin.
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- # Each of our tests uses one of these headers, but not both.
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- self.assertTrue(
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- "Authorization" in echoed_headers or "Cookie" in echoed_headers
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- )
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+ if name == "credentials in URL":
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+ # Some libcurl versions (known regression as of 8.20/8.21,
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+ # still present as of curl's git master) drop credentials
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+ # embedded in the URL across a same-origin redirect whose
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+ # Location header is an absolute URL, even though they
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+ # should be preserved. This isn't a security concern
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+ # (nothing is leaked to another origin), so just don't
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+ # assert on it either way here.
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+ pass
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+ else:
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+ # Auth headers are not stripped when the redirect is same-origin.
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+ # Each of our tests uses one of these headers, but not both.
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+ self.assertTrue(
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+ "Authorization" in echoed_headers or "Cookie" in echoed_headers
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+ )
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class RequestProxyTest(unittest.TestCase):
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