From ff02f0908cfd94e9342b6c46e2dedaa4b2299190ebf6c441b5a172de6690d01e Mon Sep 17 00:00:00 2001 From: Matej Cepl Date: Wed, 12 Jul 2023 15:19:06 +0000 Subject: [PATCH] - (bsc#1210638, CVE-2023-27043) Add CVE-2023-27043-email-parsing-errors.patch, which detects email address parsing errors and returns empty tuple to indicate the parsing error (old API). OBS-URL: https://build.opensuse.org/package/show/devel:languages:python:Factory/python311?expand=0&rev=74 --- CVE-2023-27043-email-parsing-errors.patch | 241 ++++++++++++++++++++++ python311.changes | 8 + python311.spec | 5 + 3 files changed, 254 insertions(+) create mode 100644 CVE-2023-27043-email-parsing-errors.patch diff --git a/CVE-2023-27043-email-parsing-errors.patch b/CVE-2023-27043-email-parsing-errors.patch new file mode 100644 index 0000000..24e6079 --- /dev/null +++ b/CVE-2023-27043-email-parsing-errors.patch @@ -0,0 +1,241 @@ +--- + Doc/library/email.utils.rst | 26 +++ + Lib/email/utils.py | 63 +++++++ + Lib/test/test_email/test_email.py | 81 +++++++++- + Misc/NEWS.d/next/Security/2023-06-13-20-52-24.gh-issue-102988.Kei7Vf.rst | 4 + 4 files changed, 164 insertions(+), 10 deletions(-) + +--- a/Doc/library/email.utils.rst ++++ b/Doc/library/email.utils.rst +@@ -67,6 +67,11 @@ of the new API. + *email address* parts. Returns a tuple of that information, unless the parse + fails, in which case a 2-tuple of ``('', '')`` is returned. + ++ .. versionchanged:: 3.12 ++ For security reasons, addresses that were ambiguous and could parse into ++ multiple different addresses now cause ``('', '')`` to be returned ++ instead of only one of the *potential* addresses. ++ + + .. function:: formataddr(pair, charset='utf-8') + +@@ -89,7 +94,7 @@ of the new API. + This method returns a list of 2-tuples of the form returned by ``parseaddr()``. + *fieldvalues* is a sequence of header field values as might be returned by + :meth:`Message.get_all `. Here's a simple +- example that gets all the recipients of a message:: ++ example that gets all the recipients of a message: + + from email.utils import getaddresses + +@@ -99,6 +104,25 @@ of the new API. + resent_ccs = msg.get_all('resent-cc', []) + all_recipients = getaddresses(tos + ccs + resent_tos + resent_ccs) + ++ When parsing fails for a single fieldvalue, a 2-tuple of ``('', '')`` ++ is returned in its place. Other errors in parsing the list of ++ addresses such as a fieldvalue seemingly parsing into multiple ++ addresses may result in a list containing a single empty 2-tuple ++ ``[('', '')]`` being returned rather than returning potentially ++ invalid output. ++ ++ Example malformed input parsing: ++ ++ .. doctest:: ++ ++ >>> from email.utils import getaddresses ++ >>> getaddresses(['alice@example.com ', 'me@example.com']) ++ [('', '')] ++ ++ .. versionchanged:: 3.12 ++ The 2-tuple of ``('', '')`` in the returned values when parsing ++ fails were added as to address a security issue. ++ + + .. function:: parsedate(date) + +--- a/Lib/email/utils.py ++++ b/Lib/email/utils.py +@@ -106,12 +106,54 @@ def formataddr(pair, charset='utf-8'): + return address + + ++def _pre_parse_validation(email_header_fields): ++ accepted_values = [] ++ for v in email_header_fields: ++ s = v.replace('\\(', '').replace('\\)', '') ++ if s.count('(') != s.count(')'): ++ v = "('', '')" ++ accepted_values.append(v) ++ ++ return accepted_values ++ ++ ++def _post_parse_validation(parsed_email_header_tuples): ++ accepted_values = [] ++ # The parser would have parsed a correctly formatted domain-literal ++ # The existence of an [ after parsing indicates a parsing failure ++ for v in parsed_email_header_tuples: ++ if '[' in v[1]: ++ v = ('', '') ++ accepted_values.append(v) ++ ++ return accepted_values ++ + + def getaddresses(fieldvalues): +- """Return a list of (REALNAME, EMAIL) for each fieldvalue.""" +- all = COMMASPACE.join(str(v) for v in fieldvalues) ++ """Return a list of (REALNAME, EMAIL) or ('','') for each fieldvalue. ++ ++ When parsing fails for a fieldvalue, a 2-tuple of ('', '') is returned in ++ its place. ++ ++ If the resulting list of parsed address is not the same as the number of ++ fieldvalues in the input list a parsing error has occurred. A list ++ containing a single empty 2-tuple [('', '')] is returned in its place. ++ This is done to avoid invalid output. ++ """ ++ fieldvalues = [str(v) for v in fieldvalues] ++ fieldvalues = _pre_parse_validation(fieldvalues) ++ all = COMMASPACE.join(v for v in fieldvalues) + a = _AddressList(all) +- return a.addresslist ++ result = _post_parse_validation(a.addresslist) ++ ++ n = 0 ++ for v in fieldvalues: ++ n += v.count(',') + 1 ++ ++ if len(result) != n: ++ return [('', '')] ++ ++ return result + + + def _format_timetuple_and_zone(timetuple, zone): +@@ -209,9 +251,18 @@ def parseaddr(addr): + Return a tuple of realname and email address, unless the parse fails, in + which case return a 2-tuple of ('', ''). + """ +- addrs = _AddressList(addr).addresslist +- if not addrs: +- return '', '' ++ if isinstance(addr, list): ++ addr = addr[0] ++ ++ if not isinstance(addr, str): ++ return ('', '') ++ ++ addr = _pre_parse_validation([addr])[0] ++ addrs = _post_parse_validation(_AddressList(addr).addresslist) ++ ++ if not addrs or len(addrs) > 1: ++ return ('', '') ++ + return addrs[0] + + +--- a/Lib/test/test_email/test_email.py ++++ b/Lib/test/test_email/test_email.py +@@ -3263,15 +3263,90 @@ Foo + [('Al Person', 'aperson@dom.ain'), + ('Bud Person', 'bperson@dom.ain')]) + ++ def test_getaddresses_parsing_errors(self): ++ """Test for parsing errors from CVE-2023-27043""" ++ eq = self.assertEqual ++ eq(utils.getaddresses(['alice@example.org(']), ++ [('', '')]) ++ eq(utils.getaddresses(['alice@example.org)']), ++ [('', '')]) ++ eq(utils.getaddresses(['alice@example.org<']), ++ [('', '')]) ++ eq(utils.getaddresses(['alice@example.org>']), ++ [('', '')]) ++ eq(utils.getaddresses(['alice@example.org@']), ++ [('', '')]) ++ eq(utils.getaddresses(['alice@example.org,']), ++ [('', 'alice@example.org'), ('', 'bob@example.com')]) ++ eq(utils.getaddresses(['alice@example.org;']), ++ [('', '')]) ++ eq(utils.getaddresses(['alice@example.org:']), ++ [('', '')]) ++ eq(utils.getaddresses(['alice@example.org.']), ++ [('', '')]) ++ eq(utils.getaddresses(['alice@example.org"']), ++ [('', '')]) ++ eq(utils.getaddresses(['alice@example.org[']), ++ [('', '')]) ++ eq(utils.getaddresses(['alice@example.org]']), ++ [('', '')]) ++ ++ def test_parseaddr_parsing_errors(self): ++ """Test for parsing errors from CVE-2023-27043""" ++ eq = self.assertEqual ++ eq(utils.parseaddr(['alice@example.org(']), ++ ('', '')) ++ eq(utils.parseaddr(['alice@example.org)']), ++ ('', '')) ++ eq(utils.parseaddr(['alice@example.org<']), ++ ('', '')) ++ eq(utils.parseaddr(['alice@example.org>']), ++ ('', '')) ++ eq(utils.parseaddr(['alice@example.org@']), ++ ('', '')) ++ eq(utils.parseaddr(['alice@example.org,']), ++ ('', '')) ++ eq(utils.parseaddr(['alice@example.org;']), ++ ('', '')) ++ eq(utils.parseaddr(['alice@example.org:']), ++ ('', '')) ++ eq(utils.parseaddr(['alice@example.org.']), ++ ('', '')) ++ eq(utils.parseaddr(['alice@example.org"']), ++ ('', '')) ++ eq(utils.parseaddr(['alice@example.org[']), ++ ('', '')) ++ eq(utils.parseaddr(['alice@example.org]']), ++ ('', '')) ++ + def test_getaddresses_nasty(self): + eq = self.assertEqual + eq(utils.getaddresses(['foo: ;']), [('', '')]) +- eq(utils.getaddresses( +- ['[]*-- =~$']), +- [('', ''), ('', ''), ('', '*--')]) ++ eq(utils.getaddresses(['[]*-- =~$']), [('', '')]) + eq(utils.getaddresses( + ['foo: ;', '"Jason R. Mastaler" ']), + [('', ''), ('Jason R. Mastaler', 'jason@dom.ain')]) ++ eq(utils.getaddresses( ++ [r'Pete(A nice \) chap) ']), ++ [('Pete (A nice ) chap his account his host)', 'pete@silly.test')]) ++ eq(utils.getaddresses( ++ ['(Empty list)(start)Undisclosed recipients :(nobody(I know))']), ++ [('', '')]) ++ eq(utils.getaddresses( ++ ['Mary <@machine.tld:mary@example.net>, , jdoe@test . example']), ++ [('Mary', 'mary@example.net'), ('', ''), ('', 'jdoe@test.example')]) ++ eq(utils.getaddresses( ++ ['John Doe ']), ++ [('John Doe (comment)', 'jdoe@machine.example')]) ++ eq(utils.getaddresses( ++ ['"Mary Smith: Personal Account" ']), ++ [('Mary Smith: Personal Account', 'smith@home.example')]) ++ eq(utils.getaddresses( ++ ['Undisclosed recipients:;']), ++ [('', '')]) ++ eq(utils.getaddresses( ++ [r', "Giant; \"Big\" Box" ']), ++ [('', 'boss@nil.test'), ('Giant; "Big" Box', 'bob@example.net')]) + + def test_getaddresses_embedded_comment(self): + """Test proper handling of a nested comment""" +--- /dev/null ++++ b/Misc/NEWS.d/next/Security/2023-06-13-20-52-24.gh-issue-102988.Kei7Vf.rst +@@ -0,0 +1,4 @@ ++CVE-2023-27043: Prevent :func:`email.utils.parseaddr` ++and :func:`email.utils.getaddresses` from returning the realname portion of an ++invalid RFC2822 email header in the email address portion of the 2-tuple ++returned after being parsed by :class:`email._parseaddr.AddressList`. diff --git a/python311.changes b/python311.changes index 3acc706..18a10a0 100644 --- a/python311.changes +++ b/python311.changes @@ -1,3 +1,11 @@ +------------------------------------------------------------------- +Tue Jul 11 07:35:18 UTC 2023 - Matej Cepl + +- (bsc#1210638, CVE-2023-27043) Add + CVE-2023-27043-email-parsing-errors.patch, which detects email + address parsing errors and returns empty tuple to indicate the + parsing error (old API). + ------------------------------------------------------------------- Wed Jun 28 19:47:28 UTC 2023 - Matej Cepl diff --git a/python311.spec b/python311.spec index 31476d4..733aac4 100644 --- a/python311.spec +++ b/python311.spec @@ -163,6 +163,10 @@ Patch38: 103213-fetch-CONFIG_ARGS.patch # PATCH-FIX-UPSTREAM skip_if_buildbot-extend.patch gh#python/cpython#103053 mcepl@suse.com # Skip test_freeze_simple_script Patch39: skip_if_buildbot-extend.patch +# PATCH-FIX-UPSTREAM CVE-2023-27043-email-parsing-errors.patch bsc#1210638 mcepl@suse.com +# Detect email address parsing errors and return empty tuple to +# indicate the parsing error (old API) +Patch40: CVE-2023-27043-email-parsing-errors.patch BuildRequires: autoconf-archive BuildRequires: automake BuildRequires: fdupes @@ -423,6 +427,7 @@ other applications. %patch36 -p1 %patch38 -p1 %patch39 -p1 +%patch40 -p1 # drop Autoconf version requirement sed -i 's/^AC_PREREQ/dnl AC_PREREQ/' configure.ac