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bpo-42988: Remove the pydoc getfile feature (GH-25015)

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CVE-2021-3426: Remove the "getfile" feature of the pydoc module which
could be abused to read arbitrary files on the disk (directory
traversal vulnerability). Moreover, even source code of Python
modules can contain sensitive data like passwords. Vulnerability
reported by David Schwörer.
This commit is contained in:
Victor Stinner 2021-03-29 14:40:40 +02:00 • committed by GitHub
parent 4827483f47
commit 9b999479c0
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GPG key ID: 4AEE18F83AFDEB23
3 changed files with 4 additions and 24 deletions
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6
Lib/test/test_pydoc.py
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@ -1374,18 +1374,12 @@ class PydocUrlHandlerTest(PydocBaseTest):
("topic?key=def", "Pydoc: KEYWORD def"),
("topic?key=STRINGS", "Pydoc: TOPIC STRINGS"),
("foobar", "Pydoc: Error - foobar"),
("getfile?key=foobar", "Pydoc: Error - getfile?key=foobar"),
]
with self.restrict_walk_packages():
for url, title in requests:
self.call_url_handler(url, title)
path = string.__file__
title = "Pydoc: getfile " + path
url = "getfile?key=" + path
self.call_url_handler(url, title)
class TestHelper(unittest.TestCase):
def test_keywords(self):