main/python2: security fixes (CVE-2019-9636, CVE-2019-9948)

fixes #10292

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