diff options
author | Dan Tran <dantran@microsoft.com> | 2019-09-11 18:58:52 +0000 |
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committer | Armin Kuster <akuster808@gmail.com> | 2019-09-24 08:28:04 -0700 |
commit | 5862716f22ca9f5745d3bca85c6ed0d8c35c437b (patch) | |
tree | a49afa9d53bd2d20b32c0566ed3c0831739ca312 /meta/recipes-devtools/python/python3/CVE-2019-9636.patch | |
parent | 3f1c02aa7b7d485e64503d601124c335d4b7299f (diff) | |
download | openembedded-core-contrib-5862716f22ca9f5745d3bca85c6ed0d8c35c437b.tar.gz |
python3: Fix CVEs
Fixes CVE-2018-14647, CVE-2018-20406, CVE-2018-20852, CVE-2019-9636,
CVE-2019-9740, and CVE-2019-9747.
Signed-off-by: Dan Tran <dantran@microsoft.com>
Signed-off-by: Armin Kuster <akuster808@gmail.com>
Diffstat (limited to 'meta/recipes-devtools/python/python3/CVE-2019-9636.patch')
-rw-r--r-- | meta/recipes-devtools/python/python3/CVE-2019-9636.patch | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/meta/recipes-devtools/python/python3/CVE-2019-9636.patch b/meta/recipes-devtools/python/python3/CVE-2019-9636.patch new file mode 100644 index 0000000000..ce8eb666cf --- /dev/null +++ b/meta/recipes-devtools/python/python3/CVE-2019-9636.patch @@ -0,0 +1,154 @@ +From b0305339567b64e07df87620e97e4cb99332aef6 Mon Sep 17 00:00:00 2001 +From: Steve Dower <steve.dower@microsoft.com> +Date: Sun, 10 Mar 2019 21:59:24 -0700 +Subject: [PATCH] bpo-36216: Add check for characters in netloc that normalize + to separators (GH-12201) (#12223) + +CVE: CVE-2019-9636 +Upstream-Status: Backport +[https://github.com/python/cpython/commit/c0d95113b070799679bcb9dc49d4960d82e8bb08] + +Signed-off-by: Dan Tran <dantran@microsoft.com> +--- + Doc/library/urllib.parse.rst | 18 +++++++++++++++ + Lib/test/test_urlparse.py | 23 +++++++++++++++++++ + Lib/urllib/parse.py | 17 ++++++++++++++ + .../2019-03-06-09-38-40.bpo-36216.6q1m4a.rst | 3 +++ + 4 files changed, 61 insertions(+) + create mode 100644 Misc/NEWS.d/next/Security/2019-03-06-09-38-40.bpo-36216.6q1m4a.rst + +diff --git a/Doc/library/urllib.parse.rst b/Doc/library/urllib.parse.rst +index 6f722a8897..a4c6b6726e 100644 +--- a/Doc/library/urllib.parse.rst ++++ b/Doc/library/urllib.parse.rst +@@ -120,6 +120,11 @@ or on combining URL components into a URL string. + Unmatched square brackets in the :attr:`netloc` attribute will raise a + :exc:`ValueError`. + ++ Characters in the :attr:`netloc` attribute that decompose under NFKC ++ normalization (as used by the IDNA encoding) into any of ``/``, ``?``, ++ ``#``, ``@``, or ``:`` will raise a :exc:`ValueError`. If the URL is ++ decomposed before parsing, no error will be raised. ++ + .. versionchanged:: 3.2 + Added IPv6 URL parsing capabilities. + +@@ -128,6 +133,10 @@ or on combining URL components into a URL string. + false), in accordance with :rfc:`3986`. Previously, a whitelist of + schemes that support fragments existed. + ++ .. versionchanged:: 3.5.7 ++ Characters that affect netloc parsing under NFKC normalization will ++ now raise :exc:`ValueError`. ++ + + .. function:: parse_qs(qs, keep_blank_values=False, strict_parsing=False, encoding='utf-8', errors='replace') + +@@ -236,6 +245,15 @@ or on combining URL components into a URL string. + Unmatched square brackets in the :attr:`netloc` attribute will raise a + :exc:`ValueError`. + ++ Characters in the :attr:`netloc` attribute that decompose under NFKC ++ normalization (as used by the IDNA encoding) into any of ``/``, ``?``, ++ ``#``, ``@``, or ``:`` will raise a :exc:`ValueError`. If the URL is ++ decomposed before parsing, no error will be raised. ++ ++ .. versionchanged:: 3.5.7 ++ Characters that affect netloc parsing under NFKC normalization will ++ now raise :exc:`ValueError`. ++ + + .. function:: urlunsplit(parts) + +diff --git a/Lib/test/test_urlparse.py b/Lib/test/test_urlparse.py +index e2cf1b7e0f..d0420b0e74 100644 +--- a/Lib/test/test_urlparse.py ++++ b/Lib/test/test_urlparse.py +@@ -1,3 +1,5 @@ ++import sys ++import unicodedata + import unittest + import urllib.parse + +@@ -970,6 +972,27 @@ class UrlParseTestCase(unittest.TestCase): + expected.append(name) + self.assertCountEqual(urllib.parse.__all__, expected) + ++ def test_urlsplit_normalization(self): ++ # Certain characters should never occur in the netloc, ++ # including under normalization. ++ # Ensure that ALL of them are detected and cause an error ++ illegal_chars = '/:#?@' ++ hex_chars = {'{:04X}'.format(ord(c)) for c in illegal_chars} ++ denorm_chars = [ ++ c for c in map(chr, range(128, sys.maxunicode)) ++ if (hex_chars & set(unicodedata.decomposition(c).split())) ++ and c not in illegal_chars ++ ] ++ # Sanity check that we found at least one such character ++ self.assertIn('\u2100', denorm_chars) ++ self.assertIn('\uFF03', denorm_chars) ++ ++ for scheme in ["http", "https", "ftp"]: ++ for c in denorm_chars: ++ url = "{}://netloc{}false.netloc/path".format(scheme, c) ++ with self.subTest(url=url, char='{:04X}'.format(ord(c))): ++ with self.assertRaises(ValueError): ++ urllib.parse.urlsplit(url) + + class Utility_Tests(unittest.TestCase): + """Testcase to test the various utility functions in the urllib.""" +diff --git a/Lib/urllib/parse.py b/Lib/urllib/parse.py +index 62e8ddf04b..7ba2b445f5 100644 +--- a/Lib/urllib/parse.py ++++ b/Lib/urllib/parse.py +@@ -327,6 +327,21 @@ def _splitnetloc(url, start=0): + delim = min(delim, wdelim) # use earliest delim position + return url[start:delim], url[delim:] # return (domain, rest) + ++def _checknetloc(netloc): ++ if not netloc or not any(ord(c) > 127 for c in netloc): ++ return ++ # looking for characters like \u2100 that expand to 'a/c' ++ # IDNA uses NFKC equivalence, so normalize for this check ++ import unicodedata ++ netloc2 = unicodedata.normalize('NFKC', netloc) ++ if netloc == netloc2: ++ return ++ _, _, netloc = netloc.rpartition('@') # anything to the left of '@' is okay ++ for c in '/?#@:': ++ if c in netloc2: ++ raise ValueError("netloc '" + netloc2 + "' contains invalid " + ++ "characters under NFKC normalization") ++ + def urlsplit(url, scheme='', allow_fragments=True): + """Parse a URL into 5 components: + <scheme>://<netloc>/<path>?<query>#<fragment> +@@ -356,6 +371,7 @@ def urlsplit(url, scheme='', allow_fragments=True): + url, fragment = url.split('#', 1) + if '?' in url: + url, query = url.split('?', 1) ++ _checknetloc(netloc) + v = SplitResult(scheme, netloc, url, query, fragment) + _parse_cache[key] = v + return _coerce_result(v) +@@ -379,6 +395,7 @@ def urlsplit(url, scheme='', allow_fragments=True): + url, fragment = url.split('#', 1) + if '?' in url: + url, query = url.split('?', 1) ++ _checknetloc(netloc) + v = SplitResult(scheme, netloc, url, query, fragment) + _parse_cache[key] = v + return _coerce_result(v) +diff --git a/Misc/NEWS.d/next/Security/2019-03-06-09-38-40.bpo-36216.6q1m4a.rst b/Misc/NEWS.d/next/Security/2019-03-06-09-38-40.bpo-36216.6q1m4a.rst +new file mode 100644 +index 0000000000..5546394157 +--- /dev/null ++++ b/Misc/NEWS.d/next/Security/2019-03-06-09-38-40.bpo-36216.6q1m4a.rst +@@ -0,0 +1,3 @@ ++Changes urlsplit() to raise ValueError when the URL contains characters that ++decompose under IDNA encoding (NFKC-normalization) into characters that ++affect how the URL is parsed. +-- +2.22.0.vfs.1.1.57.gbaf16c8 + |