python: CVE-2019-16056

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>
(cherry picked from commit 27be9cf71a6fe906a23e81b56f1cc18a6fc9ef97)
Signed-off-by: Armin Kuster <akuster808@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 91 insertions, 0 deletions

diff --git a/meta/recipes-devtools/python/python/0001-2.7-bpo-34155-Dont-parse-domains-containing-GH-13079.patch b/meta/recipes-devtools/python/python/0001-2.7-bpo-34155-Dont-parse-domains-containing-GH-13079.patch
new file mode 100644
index 0000000000..5415472a35
--- /dev/null
+++ b/meta/recipes-devtools/python/python/0001-2.7-bpo-34155-Dont-parse-domains-containing-GH-13079.patch
@@ -0,0 +1,90 @@
+From 532ed09c5454bb789a301bb6f1339a0818255610 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Roberto=20C=2E=20S=C3=A1nchez?= <roberto@connexer.com>
+Date: Sat, 14 Sep 2019 13:26:38 -0400
+Subject: [PATCH] [2.7] bpo-34155: Dont parse domains containing @ (GH-13079)
+ (GH-16006)
+
+This change skips parsing of email addresses where domains include a "@" character, which can be maliciously used since the local part is returned as a complete address.
+
+(cherry picked from commit 8cb65d1381b027f0b09ee36bfed7f35bb4dec9a9)
+
+Excludes changes to Lib/email/_header_value_parser.py, which did not
+exist in 2.7.
+
+Co-authored-by: jpic <jpic@users.noreply.github.com>
+
+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/_parseaddr.py                            | 11 ++++++++++-
+ Lib/email/test/test_email.py                       | 14 ++++++++++++++
+ .../2019-05-04-13-33-37.bpo-34155.MJll68.rst       |  1 +
+ 3 files changed, 25 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/_parseaddr.py b/Lib/email/_parseaddr.py
+index 690db2c22d..dc49d2e45a 100644
+--- a/Lib/email/_parseaddr.py
++++ b/Lib/email/_parseaddr.py
+@@ -336,7 +336,12 @@ 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."""
+@@ -351,6 +356,10 @@ 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/email/test/test_email.py b/Lib/email/test/test_email.py
+index 4b4dee3d34..2efe44ac5a 100644
+--- a/Lib/email/test/test_email.py
++++ b/Lib/email/test/test_email.py
+@@ -2306,6 +2306,20 @@ 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.
diff --git a/meta/recipes-devtools/python/python_2.7.16.bb b/meta/recipes-devtools/python/python_2.7.16.bb
index ec724c3918..b263e7214c 100644
--- a/meta/recipes-devtools/python/python_2.7.16.bb
+++ b/meta/recipes-devtools/python/python_2.7.16.bb
@@ -30,6 +30,7 @@ SRC_URI += " \
            file://support_SOURCE_DATE_EPOCH_in_py_compile_2.7.patch \
            file://float-endian.patch \
            file://0001-python2-use-cc_basename-to-replace-CC-for-checking-c.patch \
+           file://0001-2.7-bpo-34155-Dont-parse-domains-containing-GH-13079.patch \
 "
 
 S = "${WORKDIR}/Python-${PV}"