import python39-3.9.2-2.module+el8.5.0+10860+d51d22f2
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CentOS Sources
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SOURCES/00360-CVE-2021-3426.patch
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SOURCES/00360-CVE-2021-3426.patch
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From ed753d94856213ae9fc028195f670e66a24e2334 Mon Sep 17 00:00:00 2001
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From: "Miss Islington (bot)"
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<31488909+miss-islington@users.noreply.github.com>
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Date: Mon, 29 Mar 2021 06:08:00 -0700
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Subject: [PATCH] bpo-42988: Remove the pydoc getfile feature (GH-25015)
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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CVE-2021-3426: Remove the "getfile" feature of the pydoc module which
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could be abused to read arbitrary files on the disk (directory
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traversal vulnerability). Moreover, even source code of Python
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modules can contain sensitive data like passwords. Vulnerability
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reported by David Schwörer.
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(cherry picked from commit 9b999479c0022edfc9835a8a1f06e046f3881048)
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Co-authored-by: Victor Stinner <vstinner@python.org>
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---
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Lib/pydoc.py | 18 ------------------
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Lib/test/test_pydoc.py | 6 ------
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.../2021-03-24-14-16-56.bpo-42988.P2aNco.rst | 4 ++++
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3 files changed, 4 insertions(+), 24 deletions(-)
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create mode 100644 Misc/NEWS.d/next/Security/2021-03-24-14-16-56.bpo-42988.P2aNco.rst
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diff --git a/Lib/pydoc.py b/Lib/pydoc.py
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index 35ef3ebdc688e6..ffa4b62c1f17b7 100755
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--- a/Lib/pydoc.py
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+++ b/Lib/pydoc.py
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@@ -2457,9 +2457,6 @@ def page(self, title, contents):
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%s</head><body bgcolor="#f0f0f8">%s<div style="clear:both;padding-top:.5em;">%s</div>
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</body></html>''' % (title, css_link, html_navbar(), contents)
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- def filelink(self, url, path):
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- return '<a href="getfile?key=%s">%s</a>' % (url, path)
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-
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html = _HTMLDoc()
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@@ -2545,19 +2542,6 @@ def bltinlink(name):
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'key = %s' % key, '#ffffff', '#ee77aa', '<br>'.join(results))
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return 'Search Results', contents
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- def html_getfile(path):
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- """Get and display a source file listing safely."""
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- path = urllib.parse.unquote(path)
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- with tokenize.open(path) as fp:
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- lines = html.escape(fp.read())
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- body = '<pre>%s</pre>' % lines
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- heading = html.heading(
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- '<big><big><strong>File Listing</strong></big></big>',
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- '#ffffff', '#7799ee')
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- contents = heading + html.bigsection(
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- 'File: %s' % path, '#ffffff', '#ee77aa', body)
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- return 'getfile %s' % path, contents
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-
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def html_topics():
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"""Index of topic texts available."""
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@@ -2649,8 +2633,6 @@ def get_html_page(url):
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op, _, url = url.partition('=')
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if op == "search?key":
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title, content = html_search(url)
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- elif op == "getfile?key":
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- title, content = html_getfile(url)
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elif op == "topic?key":
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# try topics first, then objects.
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try:
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diff --git a/Lib/test/test_pydoc.py b/Lib/test/test_pydoc.py
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index ffabb7f1b94072..0bbdc42c635be4 100644
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--- a/Lib/test/test_pydoc.py
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+++ b/Lib/test/test_pydoc.py
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@@ -1374,18 +1374,12 @@ def test_url_requests(self):
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("topic?key=def", "Pydoc: KEYWORD def"),
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("topic?key=STRINGS", "Pydoc: TOPIC STRINGS"),
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("foobar", "Pydoc: Error - foobar"),
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- ("getfile?key=foobar", "Pydoc: Error - getfile?key=foobar"),
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]
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with self.restrict_walk_packages():
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for url, title in requests:
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self.call_url_handler(url, title)
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- path = string.__file__
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- title = "Pydoc: getfile " + path
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- url = "getfile?key=" + path
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- self.call_url_handler(url, title)
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-
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class TestHelper(unittest.TestCase):
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def test_keywords(self):
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diff --git a/Misc/NEWS.d/next/Security/2021-03-24-14-16-56.bpo-42988.P2aNco.rst b/Misc/NEWS.d/next/Security/2021-03-24-14-16-56.bpo-42988.P2aNco.rst
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new file mode 100644
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index 00000000000000..4b42dd05305a83
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--- /dev/null
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+++ b/Misc/NEWS.d/next/Security/2021-03-24-14-16-56.bpo-42988.P2aNco.rst
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@@ -0,0 +1,4 @@
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+CVE-2021-3426: Remove the ``getfile`` feature of the :mod:`pydoc` module which
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+could be abused to read arbitrary files on the disk (directory traversal
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+vulnerability). Moreover, even source code of Python modules can contain
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+sensitive data like passwords. Vulnerability reported by David Schwörer.
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@ -17,7 +17,7 @@ URL: https://www.python.org/
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#global prerel ...
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%global upstream_version %{general_version}%{?prerel}
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Version: %{general_version}%{?prerel:~%{prerel}}
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Release: 1%{?dist}
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Release: 2%{?dist}
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License: Python
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# Exclude i686 arch. Due to a modularity issue it's being added to the
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@ -383,6 +383,12 @@ Patch329: 00329-fips.patch
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# a nightmare because it's basically a binary file.
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Patch353: 00353-architecture-names-upstream-downstream.patch
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# 00360 #
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# CVE-2021-3426: information disclosure via pydoc
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# Upstream: https://bugs.python.org/issue42988
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# Main BZ: https://bugzilla.redhat.com/show_bug.cgi?id=1935913
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Patch360: 00360-CVE-2021-3426.patch
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# (New patches go here ^^^)
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#
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# When adding new patches to "python" and "python3" in Fedora, EL, etc.,
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@ -771,6 +777,7 @@ rm Lib/ensurepip/_bundled/*.whl
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%apply_patch -q %{PATCH328}
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%apply_patch -q %{PATCH329}
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%apply_patch -q %{PATCH353}
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%apply_patch -q %{PATCH360}
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# Remove all exe files to ensure we are not shipping prebuilt binaries
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# note that those are only used to create Microsoft Windows installers
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@ -1934,6 +1941,10 @@ fi
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# ======================================================
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%changelog
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* Fri Apr 30 2021 Charalampos Stratakis <cstratak@redhat.com> - 3.9.2-2
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- Security fix for CVE-2021-3426: information disclosure via pydoc
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Resolves: rhbz#1935913
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* Wed Mar 03 2021 Lumír Balhar <lbalhar@redhat.com> - 3.9.2-1
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- Update to 3.9.2 to fix CVE-2021-23336
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Resolves: rhbz#1928904
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