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-rw-r--r--system/python3/CVE-2019-16056.patch131
1 files changed, 131 insertions, 0 deletions
diff --git a/system/python3/CVE-2019-16056.patch b/system/python3/CVE-2019-16056.patch
new file mode 100644
index 000000000..b2f5ce826
--- /dev/null
+++ b/system/python3/CVE-2019-16056.patch
@@ -0,0 +1,131 @@
+From 13a19139b5e76175bc95294d54afc9425e4f36c9 Mon Sep 17 00:00:00 2001
+From: "Miss Islington (bot)"
+ <31488909+miss-islington@users.noreply.github.com>
+Date: Fri, 9 Aug 2019 08:22:19 -0700
+Subject: [PATCH] bpo-34155: Dont parse domains containing @ (GH-13079)
+ (GH-14826)
+
+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
+(cherry picked from commit 8cb65d1381b027f0b09ee36bfed7f35bb4dec9a9)
+
+Co-authored-by: jpic <jpic@users.noreply.github.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 737951e4b1b1..bc9c9b6241d4 100644
+--- a/Lib/email/_header_value_parser.py
++++ b/Lib/email/_header_value_parser.py
+@@ -1561,6 +1561,8 @@ 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 cdfa3729adc7..41ff6f8c000d 100644
+--- a/Lib/email/_parseaddr.py
++++ b/Lib/email/_parseaddr.py
+@@ -379,7 +379,12 @@ def getaddrspec(self):
+ 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 @@ def getdomain(self):
+ 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 a2c900fa7fd2..02ef3e1006c6 100644
+--- a/Lib/test/test_email/test__header_value_parser.py
++++ b/Lib/test/test_email/test__header_value_parser.py
+@@ -1418,6 +1418,16 @@ def test_get_addr_spec_dot_atom(self):
+ 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 f97ccc6711cc..68d052279987 100644
+--- a/Lib/test/test_email/test_email.py
++++ b/Lib/test/test_email/test_email.py
+@@ -3035,6 +3035,20 @@ def test_parseaddr_empty(self):
+ 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 000000000000..50292e29ed1d
+--- /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.