diff options
Diffstat (limited to 'main/python2/CVE-2019-9636.patch')
| -rw-r--r-- | main/python2/CVE-2019-9636.patch | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/main/python2/CVE-2019-9636.patch b/main/python2/CVE-2019-9636.patch new file mode 100644 index 0000000000..17a98a4196 --- /dev/null +++ b/main/python2/CVE-2019-9636.patch @@ -0,0 +1,155 @@ +From e37ef41289b77e0f0bb9a6aedb0360664c55bdd5 Mon Sep 17 00:00:00 2001 +From: Steve Dower <steve.dower@microsoft.com> +Date: Thu, 7 Mar 2019 09:08:45 -0800 +Subject: [PATCH] bpo-36216: Add check for characters in netloc that normalize + to separators (GH-12201) + +--- + Doc/library/urlparse.rst | 20 ++++++++++++++++ + Lib/test/test_urlparse.py | 24 +++++++++++++++++++ + Lib/urlparse.py | 17 +++++++++++++ + .../2019-03-06-09-38-40.bpo-36216.6q1m4a.rst | 3 +++ + 4 files changed, 64 insertions(+) + create mode 100644 Misc/NEWS.d/next/Security/2019-03-06-09-38-40.bpo-36216.6q1m4a.rst + +diff --git a/Doc/library/urlparse.rst b/Doc/library/urlparse.rst +index 22249da54fbb..0989c88c3022 100644 +--- a/Doc/library/urlparse.rst ++++ b/Doc/library/urlparse.rst +@@ -119,12 +119,22 @@ The :mod:`urlparse` module defines the following functions: + See section :ref:`urlparse-result-object` for more information on the result + object. + ++ 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, or is not a Unicode string, no error will be ++ raised. ++ + .. versionchanged:: 2.5 + Added attributes to return value. + + .. versionchanged:: 2.7 + Added IPv6 URL parsing capabilities. + ++ .. versionchanged:: 2.7.17 ++ Characters that affect netloc parsing under NFKC normalization will ++ now raise :exc:`ValueError`. ++ + + .. function:: parse_qs(qs[, keep_blank_values[, strict_parsing[, max_num_fields]]]) + +@@ -232,11 +242,21 @@ The :mod:`urlparse` module defines the following functions: + See section :ref:`urlparse-result-object` for more information on the result + object. + ++ 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, or is not a Unicode string, no error will be ++ raised. ++ + .. versionadded:: 2.2 + + .. versionchanged:: 2.5 + Added attributes to return value. + ++ .. versionchanged:: 2.7.17 ++ 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 4e1ded73c266..73b0228ea8e3 100644 +--- a/Lib/test/test_urlparse.py ++++ b/Lib/test/test_urlparse.py +@@ -1,4 +1,6 @@ + from test import test_support ++import sys ++import unicodedata + import unittest + import urlparse + +@@ -624,6 +626,28 @@ def test_portseparator(self): + self.assertEqual(urlparse.urlparse("http://www.python.org:80"), + ('http','www.python.org:80','','','','')) + ++ 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 = u'/:#?@' ++ hex_chars = {'{:04X}'.format(ord(c)) for c in illegal_chars} ++ denorm_chars = [ ++ c for c in map(unichr, 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(u'\u2100', denorm_chars) ++ self.assertIn(u'\uFF03', denorm_chars) ++ ++ for scheme in [u"http", u"https", u"ftp"]: ++ for c in denorm_chars: ++ url = u"{}://netloc{}false.netloc/path".format(scheme, c) ++ print "Checking %r" % url ++ with self.assertRaises(ValueError): ++ urlparse.urlsplit(url) ++ + def test_main(): + test_support.run_unittest(UrlParseTestCase) + +diff --git a/Lib/urlparse.py b/Lib/urlparse.py +index f7c2b032b097..54eda08651ab 100644 +--- a/Lib/urlparse.py ++++ b/Lib/urlparse.py +@@ -165,6 +165,21 @@ 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 isinstance(netloc, unicode): ++ 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> +@@ -193,6 +208,7 @@ 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 v +@@ -216,6 +232,7 @@ 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 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 000000000000..1e1ad92c6feb +--- /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. +\ No newline at end of file |