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OBS-URL: https://build.opensuse.org/package/show/devel:languages:python:Factory/python?expand=0&rev=373
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Matej Cepl 2023-07-13 21:50:15 +00:00 committed by Git OBS Bridge
parent 4afae2e051
commit 8e5f3115ae
7 changed files with 176 additions and 0 deletions
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137
CVE-2023-27043-email-parsing-errors.patch Normal file
View File

@ -0,0 +1,137 @@
---
Doc/library/email.utils.rst | 24 +++
Lib/email/utils.py | 66 +++++++++-
Misc/NEWS.d/next/Security/2023-06-13-20-52-24.gh-issue-102988.Kei7Vf.rst | 4
3 files changed, 88 insertions(+), 6 deletions(-)
--- a/Doc/library/email.utils.rst
+++ b/Doc/library/email.utils.rst
@@ -63,6 +63,11 @@ There are several useful utilities provi
:func:`time.mktime`; otherwise ``None`` will be returned. Note that indexes 6,
7, and 8 of the result tuple are not usable.
+ .. 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:: parsedate_tz(date)
@@ -103,6 +108,25 @@ There are several useful utilities provi
.. versionadded:: 2.4
+ 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 <bob@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:: make_msgid([idstring])
--- a/Lib/email/utils.py
+++ b/Lib/email/utils.py
@@ -101,11 +101,56 @@ def formataddr(pair):
+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(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
@@ -217,9 +262,18 @@ 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]
--- /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`.

8
python-base.changes
View File

@ -1,3 +1,11 @@
-------------------------------------------------------------------
Tue Jul 11 07:35:18 UTC 2023 - Matej Cepl <mcepl@suse.com>
- (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 7 15:37:43 UTC 2023 - Matej Cepl <mcepl@suse.com>

5
python-base.spec
View File

@ -149,6 +149,10 @@ Patch75: CVE-2023-24329-blank-URL-bypass.patch
# PATCH-FIX-OPENSUSE PygmentsBridge-trime_doctest_flags.patch mcepl@suse.com
# Build documentation even without PygmentsBridge.trim_doctest_flags
Patch76: PygmentsBridge-trime_doctest_flags.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)
Patch77: CVE-2023-27043-email-parsing-errors.patch
# COMMON-PATCH-END
%define python_version %(echo %{tarversion} | head -c 3)
BuildRequires: automake
@ -301,6 +305,7 @@ other applications.
%endif
%patch75 -p1
%patch76 -p1
%patch77 -p1
# For patch 66
cp -v %{SOURCE66} Lib/test/recursion.tar

8
python-doc.changes
View File

@ -1,3 +1,11 @@
-------------------------------------------------------------------
Tue Jul 11 07:35:18 UTC 2023 - Matej Cepl <mcepl@suse.com>
- (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 7 15:37:43 UTC 2023 - Matej Cepl <mcepl@suse.com>

5
python-doc.spec
View File

@ -148,6 +148,10 @@ Patch75: CVE-2023-24329-blank-URL-bypass.patch
# PATCH-FIX-OPENSUSE PygmentsBridge-trime_doctest_flags.patch mcepl@suse.com
# Build documentation even without PygmentsBridge.trim_doctest_flags
Patch76: PygmentsBridge-trime_doctest_flags.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)
Patch77: CVE-2023-27043-email-parsing-errors.patch
# COMMON-PATCH-END
Provides: pyth_doc = %{version}
Provides: pyth_ps = %{version}
@ -235,6 +239,7 @@ Python, and Macintosh Module Reference in PDF format.
%endif
%patch75 -p1
%patch76 -p1
%patch77 -p1
# For patch 66
cp -v %{SOURCE66} Lib/test/recursion.tar

8
python.changes
View File

@ -1,3 +1,11 @@
-------------------------------------------------------------------
Tue Jul 11 07:35:18 UTC 2023 - Matej Cepl <mcepl@suse.com>
- (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 7 15:37:43 UTC 2023 - Matej Cepl <mcepl@suse.com>

5
python.spec
View File

@ -148,6 +148,10 @@ Patch75: CVE-2023-24329-blank-URL-bypass.patch
# PATCH-FIX-OPENSUSE PygmentsBridge-trime_doctest_flags.patch mcepl@suse.com
# Build documentation even without PygmentsBridge.trim_doctest_flags
Patch76: PygmentsBridge-trime_doctest_flags.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)
Patch77: CVE-2023-27043-email-parsing-errors.patch
# COMMON-PATCH-END
BuildRequires: automake
BuildRequires: db-devel
@ -355,6 +359,7 @@ that rely on earlier non-verification behavior.
%endif
%patch75 -p1
%patch76 -p1
%patch77 -p1
# For patch 66
cp -v %{SOURCE66} Lib/test/recursion.tar