8000 [3.8] gh-104049: do not expose on-disk location from SimpleHTTPRequestHandler (GH-104067) by miss-islington · Pull Request #104121 · python/cpython · GitHub
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[3.8] gh-104049: do not expose on-disk location from SimpleHTTPRequestHandler (GH-104067) #104121

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Merged
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May 22, 2023
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[3.8] gh-104049: do not expose on-disk location from SimpleHTTPRequestHandler (GH-104067) #104121

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gh-104049: do not expose on-disk location from SimpleHTTPRequestHandl… 
…er (GH-104067)

Do not expose the local server's on-disk location from `SimpleHTTPRequestHandler` when generating a directory index. (unnecessary information disclosure)

---------

(cherry picked from commit c7c3a60)

Co-authored-by: Ethan Furman <ethan@stoneleaf.us>
Co-authored-by: Gregory P. Smith <greg@krypto.org>
Co-authored-by: Jelle Zijlstra <jelle.zijlstra@gmail.com>
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@ethanfurman @gpshead
@JelleZijlstra @miss-islington
3 people authored and miss-islington committed May 3, 2023
commit 172c6e2e0ce27be901aa11c7edd077f66c73cd75
2 changes: 1 addition & 1 deletion Lib/http/server.py
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Expand Up @@ -786,7 +786,7 @@ def list_directory(self, path):
displaypath = urllib.parse.unquote(self.path,
errors='surrogatepass')
except UnicodeDecodeError:
displaypath = urllib.parse.unquote(path)
displaypath = urllib.parse.unquote(self.path)
displaypath = html.escape(displaypath, quote=False)
enc = sys.getfilesystemencoding()
title = 'Directory listing for %s' % displaypath
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8 changes: 8 additions & 0 deletions Lib/test/test_httpservers.py
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Expand Up @@ -414,6 +414,14 @@ def test_undecodable_filename(self):
self.check_status_and_reason(response, HTTPStatus.OK,
data=support.TESTFN_UNDECODABLE)

def test_undecodable_parameter(self):
# sanity check using a valid parameter
response = self.request(self.base_url + '/?x=123').read()
self.assertRegex(response, f'listing for {self.base_url}/\?x=123'.encode('latin1'))
# now the bogus encoding
response = self.request(self.base_url + '/?x=%bb').read()
self.assertRegex(response, f'listing for {self.base_url}/\?x=\xef\xbf\xbd'.encode('latin1'))

def test_get_dir_redirect_location_domain_injection_bug(self):
"""Ensure //evil.co/..%2f../../X does not put //evil.co/ in Location.

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2 changes: 2 additions & 0 deletions Misc/NEWS.d/next/Security/2023-05-01-15-03-25.gh-issue-104049.b01Y3g.rst
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@@ -0,0 +1,2 @@
Do not expose the local on-disk location in directory indexes
produced by :class:`http.client.SimpleHTTPRequestHandler`.
0