python3: CVE-2019-16056

(From OE-Core rev: b80c0a4b6821da55d2882b60d5d3e7b21d43a383)

Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: Armin Kuster <akuster808@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 132 insertions, 0 deletions

diff --git a/meta/recipes-devtools/python/python3/0001-bpo-34155-Dont-parse-domains-containing-GH-13079.patch b/meta/recipes-devtools/python/python3/0001-bpo-34155-Dont-parse-domains-containing-GH-13079.patch
new file mode 100644
index 0000000000..319e7ed07e
--- /dev/null
+++ b/meta/recipes-devtools/python/python3/0001-bpo-34155-Dont-parse-domains-containing-GH-13079.patch
@@ -0,0 +1,132 @@
+From 90d56127ae15b1e452755e62c77dc475dedf7161 Mon Sep 17 00:00:00 2001
+From: jpic <jpic@users.noreply.github.com>
+Date: Wed, 17 Jul 2019 23:54:25 +0200
+Subject: [PATCH] bpo-34155: Dont parse domains containing @ (GH-13079)
+
+Before:
+
+        >>> email.message_from_string('From: a@malicious.org@important.com', policy=email.policy.default)['from'].addresses
+        (Address(display_name='', username='a', domain='malicious.org'),)
+
+        >>> parseaddr('a@malicious.org@important.com')
+        ('', 'a@malicious.org')
+
+    After:
+
+        >>> email.message_from_string('From: a@malicious.org@important.com', policy=email.policy.default)['from'].addresses
+        (Address(display_name='', username='', domain=''),)
+
+        >>> parseaddr('a@malicious.org@important.com')
+        ('', 'a@')
+
+https://bugs.python.org/issue34155
+
+Upstream-Status: Backport [https://github.com/python/cpython/commit/8cb65d1381b027f0b09ee36bfed7f35bb4dec9a9]
+
+CVE: CVE-2019-16056
+
+Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
+---
+ Lib/email/_header_value_parser.py                  |  2 ++
+ Lib/email/_parseaddr.py                            | 11 ++++++++++-
+ Lib/test/test_email/test__header_value_parser.py   | 10 ++++++++++
+ Lib/test/test_email/test_email.py                  | 14 ++++++++++++++
+ .../2019-05-04-13-33-37.bpo-34155.MJll68.rst       |  1 +
+ 5 files changed, 37 insertions(+), 1 deletion(-)
+ create mode 100644 Misc/NEWS.d/next/Security/2019-05-04-13-33-37.bpo-34155.MJll68.rst
+
+diff --git a/Lib/email/_header_value_parser.py b/Lib/email/_header_value_parser.py
+index fc00b4a098..bbc026ec71 100644
+--- a/Lib/email/_header_value_parser.py
++++ b/Lib/email/_header_value_parser.py
+@@ -1582,6 +1582,8 @@ def get_domain(value):
+         token, value = get_dot_atom(value)
+     except errors.HeaderParseError:
+         token, value = get_atom(value)
++    if value and value[0] == '@':
++        raise errors.HeaderParseError('Invalid Domain')
+     if leader is not None:
+         token[:0] = [leader]
+     domain.append(token)
+diff --git a/Lib/email/_parseaddr.py b/Lib/email/_parseaddr.py
+index cdfa3729ad..41ff6f8c00 100644
+--- a/Lib/email/_parseaddr.py
++++ b/Lib/email/_parseaddr.py
+@@ -379,7 +379,12 @@ class AddrlistClass:
+         aslist.append('@')
+         self.pos += 1
+         self.gotonext()
+-        return EMPTYSTRING.join(aslist) + self.getdomain()
++        domain = self.getdomain()
++        if not domain:
++            # Invalid domain, return an empty address instead of returning a
++            # local part to denote failed parsing.
++            return EMPTYSTRING
++        return EMPTYSTRING.join(aslist) + domain
+ 
+     def getdomain(self):
+         """Get the complete domain name from an address."""
+@@ -394,6 +399,10 @@ class AddrlistClass:
+             elif self.field[self.pos] == '.':
+                 self.pos += 1
+                 sdlist.append('.')
++            elif self.field[self.pos] == '@':
++                # bpo-34155: Don't parse domains with two `@` like
++                # `a@malicious.org@important.com`.
++                return EMPTYSTRING
+             elif self.field[self.pos] in self.atomends:
+                 break
+             else:
+diff --git a/Lib/test/test_email/test__header_value_parser.py b/Lib/test/test_email/test__header_value_parser.py
+index 693487bc96..7dc4de1b7b 100644
+--- a/Lib/test/test_email/test__header_value_parser.py
++++ b/Lib/test/test_email/test__header_value_parser.py
+@@ -1438,6 +1438,16 @@ class TestParser(TestParserMixin, TestEmailBase):
+         self.assertEqual(addr_spec.domain, 'example.com')
+         self.assertEqual(addr_spec.addr_spec, 'star.a.star@example.com')
+ 
++    def test_get_addr_spec_multiple_domains(self):
++        with self.assertRaises(errors.HeaderParseError):
++            parser.get_addr_spec('star@a.star@example.com')
++
++        with self.assertRaises(errors.HeaderParseError):
++            parser.get_addr_spec('star@a@example.com')
++
++        with self.assertRaises(errors.HeaderParseError):
++            parser.get_addr_spec('star@172.17.0.1@example.com')
++
+     # get_obs_route
+ 
+     def test_get_obs_route_simple(self):
+diff --git a/Lib/test/test_email/test_email.py b/Lib/test/test_email/test_email.py
+index c29cc56203..aa775881c5 100644
+--- a/Lib/test/test_email/test_email.py
++++ b/Lib/test/test_email/test_email.py
+@@ -3041,6 +3041,20 @@ class TestMiscellaneous(TestEmailBase):
+         self.assertEqual(utils.parseaddr('<>'), ('', ''))
+         self.assertEqual(utils.formataddr(utils.parseaddr('<>')), '')
+ 
++    def test_parseaddr_multiple_domains(self):
++        self.assertEqual(
++            utils.parseaddr('a@b@c'),
++            ('', '')
++        )
++        self.assertEqual(
++            utils.parseaddr('a@b.c@c'),
++            ('', '')
++        )
++        self.assertEqual(
++            utils.parseaddr('a@172.17.0.1@c'),
++            ('', '')
++        )
++
+     def test_noquote_dump(self):
+         self.assertEqual(
+             utils.formataddr(('A Silly Person', 'person@dom.ain')),
+diff --git a/Misc/NEWS.d/next/Security/2019-05-04-13-33-37.bpo-34155.MJll68.rst b/Misc/NEWS.d/next/Security/2019-05-04-13-33-37.bpo-34155.MJll68.rst
+new file mode 100644
+index 0000000000..50292e29ed
+--- /dev/null
++++ b/Misc/NEWS.d/next/Security/2019-05-04-13-33-37.bpo-34155.MJll68.rst
+@@ -0,0 +1 @@
++Fix parsing of invalid email addresses with more than one ``@`` (e.g. a@b@c.com.) to not return the part before 2nd ``@`` as valid email address. Patch by maxking & jpic.