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import CS python3.11-3.11.13-7.el9

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AlmaLinux RelEng Bot 2026-03-30 10:02:36 -04:00
parent 5804a97c2e
commit b5c70096d0
7 changed files with 685 additions and 1 deletions
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140
SOURCES/00471-cve-2025-12084.patch Normal file
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@ -0,0 +1,140 @@
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: "Miss Islington (bot)"
<31488909+miss-islington@users.noreply.github.com>
Date: Mon, 22 Dec 2025 14:48:49 +0100
Subject: 00471: CVE-2025-12084
* gh-142145: Remove quadratic behavior in node ID cache clearing (GH-142146)
* gh-142754: Ensure that Element & Attr instances have the ownerDocument attribute (GH-142794)
(cherry picked from commit 1cc7551b3f9f71efbc88d96dce90f82de98b2454)
(cherry picked from commit 08d8e18ad81cd45bc4a27d6da478b51ea49486e4)
(cherry picked from commit 8d2d7bb2e754f8649a68ce4116271a4932f76907)
Co-authored-by: Jacob Walls <38668450+jacobtylerwalls@users.noreply.github.com>
Co-authored-by: Seth Michael Larson <seth@python.org>
Co-authored-by: Petr Viktorin <encukou@gmail.com>
Co-authored-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com>
Co-authored-by: Gregory P. Smith <68491+gpshead@users.noreply.github.com>
Co-authored-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com>
Co-authored-by: Gregory P. Smith <68491+gpshead@users.noreply.github.com>
Co-authored-by: Gregory P. Smith <greg@krypto.org>
---
Lib/test/test_minidom.py | 33 ++++++++++++++++++-
Lib/xml/dom/minidom.py | 11 ++-----
...-12-01-09-36-45.gh-issue-142145.tcAUhg.rst | 6 ++++
3 files changed, 41 insertions(+), 9 deletions(-)
create mode 100644 Misc/NEWS.d/next/Security/2025-12-01-09-36-45.gh-issue-142145.tcAUhg.rst
diff --git a/Lib/test/test_minidom.py b/Lib/test/test_minidom.py
index ef38c36210..c68bd990f7 100644
--- a/Lib/test/test_minidom.py
+++ b/Lib/test/test_minidom.py
@@ -2,6 +2,7 @@
import copy
import pickle
+import time
import io
from test import support
import unittest
@@ -9,7 +10,7 @@
import pyexpat
import xml.dom.minidom
-from xml.dom.minidom import parse, Attr, Node, Document, parseString
+from xml.dom.minidom import parse, Attr, Node, Document, Element, parseString
from xml.dom.minidom import getDOMImplementation
from xml.parsers.expat import ExpatError
@@ -177,6 +178,36 @@ def testAppendChild(self):
self.confirm(dom.documentElement.childNodes[-1].data == "Hello")
dom.unlink()
+ @support.requires_resource('cpu')
+ def testAppendChildNoQuadraticComplexity(self):
+ impl = getDOMImplementation()
+
+ newdoc = impl.createDocument(None, "some_tag", None)
+ top_element = newdoc.documentElement
+ children = [newdoc.createElement(f"child-{i}") for i in range(1, 2 ** 15 + 1)]
+ element = top_element
+
+ start = time.monotonic()
+ for child in children:
+ element.appendChild(child)
+ element = child
+ end = time.monotonic()
+
+ # This example used to take at least 30 seconds.
+ # Conservative assertion due to the wide variety of systems and
+ # build configs timing based tests wind up run under.
+ # A --with-address-sanitizer --with-pydebug build on a rpi5 still
+ # completes this loop in <0.5 seconds.
+ self.assertLess(end - start, 4)
+
+ def testSetAttributeNodeWithoutOwnerDocument(self):
+ # regression test for gh-142754
+ elem = Element("test")
+ attr = Attr("id")
+ attr.value = "test-id"
+ elem.setAttributeNode(attr)
+ self.assertEqual(elem.getAttribute("id"), "test-id")
+
def testAppendChildFragment(self):
dom, orig, c1, c2, c3, frag = self._create_fragment_test_nodes()
dom.documentElement.appendChild(frag)
diff --git a/Lib/xml/dom/minidom.py b/Lib/xml/dom/minidom.py
index ef8a159833..cada981f39 100644
--- a/Lib/xml/dom/minidom.py
+++ b/Lib/xml/dom/minidom.py
@@ -292,13 +292,6 @@ def _append_child(self, node):
childNodes.append(node)
node.parentNode = self
-def _in_document(node):
- # return True iff node is part of a document tree
- while node is not None:
- if node.nodeType == Node.DOCUMENT_NODE:
- return True
- node = node.parentNode
- return False
def _write_data(writer, data):
"Writes datachars to writer."
@@ -355,6 +348,7 @@ class Attr(Node):
def __init__(self, qName, namespaceURI=EMPTY_NAMESPACE, localName=None,
prefix=None):
self.ownerElement = None
+ self.ownerDocument = None
self._name = qName
self.namespaceURI = namespaceURI
self._prefix = prefix
@@ -680,6 +674,7 @@ class Element(Node):
def __init__(self, tagName, namespaceURI=EMPTY_NAMESPACE, prefix=None,
localName=None):
+ self.ownerDocument = None
self.parentNode = None
self.tagName = self.nodeName = tagName
self.prefix = prefix
@@ -1539,7 +1534,7 @@ def _clear_id_cache(node):
if node.nodeType == Node.DOCUMENT_NODE:
node._id_cache.clear()
node._id_search_stack = None
- elif _in_document(node):
+ elif node.ownerDocument:
node.ownerDocument._id_cache.clear()
node.ownerDocument._id_search_stack= None
diff --git a/Misc/NEWS.d/next/Security/2025-12-01-09-36-45.gh-issue-142145.tcAUhg.rst b/Misc/NEWS.d/next/Security/2025-12-01-09-36-45.gh-issue-142145.tcAUhg.rst
new file mode 100644
index 0000000000..05c7df35d1
--- /dev/null
+++ b/Misc/NEWS.d/next/Security/2025-12-01-09-36-45.gh-issue-142145.tcAUhg.rst
@@ -0,0 +1,6 @@
+Remove quadratic behavior in ``xml.minidom`` node ID cache clearing. In order
+to do this without breaking existing users, we also add the *ownerDocument*
+attribute to :mod:`xml.dom.minidom` elements and attributes created by directly
+instantiating the ``Element`` or ``Attr`` class. Note that this way of creating
+nodes is not supported; creator functions like
+:py:meth:`xml.dom.Document.documentElement` should be used instead.

156
SOURCES/00472-cve-2025-13836.patch Normal file
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@ -0,0 +1,156 @@
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Serhiy Storchaka <storchaka@gmail.com>
Date: Mon, 1 Dec 2025 17:26:07 +0200
Subject: 00472: CVE-2025-13836
gh-119451: Fix a potential denial of service in http.client (GH-119454)
Reading the whole body of the HTTP response could cause OOM if
the Content-Length value is too large even if the server does not send
a large amount of data. Now the HTTP client reads large data by chunks,
therefore the amount of consumed memory is proportional to the amount
of sent data.
(cherry picked from commit 5a4c4a033a4a54481be6870aa1896fad732555b5)
Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
---
Lib/http/client.py | 28 ++++++--
Lib/test/test_httplib.py | 66 +++++++++++++++++++
...-05-23-11-47-48.gh-issue-119451.qkJe9-.rst | 5 ++
3 files changed, 95 insertions(+), 4 deletions(-)
create mode 100644 Misc/NEWS.d/next/Security/2024-05-23-11-47-48.gh-issue-119451.qkJe9-.rst
diff --git a/Lib/http/client.py b/Lib/http/client.py
index 91ee1b470c..c977612732 100644
--- a/Lib/http/client.py
+++ b/Lib/http/client.py
@@ -111,6 +111,11 @@
_MAXLINE = 65536
_MAXHEADERS = 100
+# Data larger than this will be read in chunks, to prevent extreme
+# overallocation.
+_MIN_READ_BUF_SIZE = 1 << 20
+
+
# Header name/value ABNF (http://tools.ietf.org/html/rfc7230#section-3.2)
#
# VCHAR = %x21-7E
@@ -635,10 +640,25 @@ def _safe_read(self, amt):
reading. If the bytes are truly not available (due to EOF), then the
IncompleteRead exception can be used to detect the problem.
"""
- data = self.fp.read(amt)
- if len(data) < amt:
- raise IncompleteRead(data, amt-len(data))
- return data
+ cursize = min(amt, _MIN_READ_BUF_SIZE)
+ data = self.fp.read(cursize)
+ if len(data) >= amt:
+ return data
+ if len(data) < cursize:
+ raise IncompleteRead(data, amt - len(data))
+
+ data = io.BytesIO(data)
+ data.seek(0, 2)
+ while True:
+ # This is a geometric increase in read size (never more than
+ # doubling out the current length of data per loop iteration).
+ delta = min(cursize, amt - cursize)
+ data.write(self.fp.read(delta))
+ if data.tell() >= amt:
+ return data.getvalue()
+ cursize += delta
+ if data.tell() < cursize:
+ raise IncompleteRead(data.getvalue(), amt - data.tell())
def _safe_readinto(self, b):
"""Same as _safe_read, but for reading into a buffer."""
diff --git a/Lib/test/test_httplib.py b/Lib/test/test_httplib.py
index 8b9d49ec09..55363413b3 100644
--- a/Lib/test/test_httplib.py
+++ b/Lib/test/test_httplib.py
@@ -1390,6 +1390,72 @@ def run_server():
thread.join()
self.assertEqual(result, b"proxied data\n")
+ def test_large_content_length(self):
+ serv = socket.create_server((HOST, 0))
+ self.addCleanup(serv.close)
+
+ def run_server():
+ [conn, address] = serv.accept()
+ with conn:
+ while conn.recv(1024):
+ conn.sendall(
+ b"HTTP/1.1 200 Ok\r\n"
+ b"Content-Length: %d\r\n"
+ b"\r\n" % size)
+ conn.sendall(b'A' * (size//3))
+ conn.sendall(b'B' * (size - size//3))
+
+ thread = threading.Thread(target=run_server)
+ thread.start()
+ self.addCleanup(thread.join, 1.0)
+
+ conn = client.HTTPConnection(*serv.getsockname())
+ try:
+ for w in range(15, 27):
+ size = 1 << w
+ conn.request("GET", "/")
+ with conn.getresponse() as response:
+ self.assertEqual(len(response.read()), size)
+ finally:
+ conn.close()
+ thread.join(1.0)
+
+ def test_large_content_length_truncated(self):
+ serv = socket.create_server((HOST, 0))
+ self.addCleanup(serv.close)
+
+ def run_server():
+ while True:
+ [conn, address] = serv.accept()
+ with conn:
+ conn.recv(1024)
+ if not size:
+ break
+ conn.sendall(
+ b"HTTP/1.1 200 Ok\r\n"
+ b"Content-Length: %d\r\n"
+ b"\r\n"
+ b"Text" % size)
+
+ thread = threading.Thread(target=run_server)
+ thread.start()
+ self.addCleanup(thread.join, 1.0)
+
+ conn = client.HTTPConnection(*serv.getsockname())
+ try:
+ for w in range(18, 65):
+ size = 1 << w
+ conn.request("GET", "/")
+ with conn.getresponse() as response:
+ self.assertRaises(client.IncompleteRead, response.read)
+ conn.close()
+ finally:
+ conn.close()
+ size = 0
+ conn.request("GET", "/")
+ conn.close()
+ thread.join(1.0)
+
def test_putrequest_override_domain_validation(self):
"""
It should be possible to override the default validation
diff --git a/Misc/NEWS.d/next/Security/2024-05-23-11-47-48.gh-issue-119451.qkJe9-.rst b/Misc/NEWS.d/next/Security/2024-05-23-11-47-48.gh-issue-119451.qkJe9-.rst
new file mode 100644
index 0000000000..6d6f25cd2f
--- /dev/null
+++ b/Misc/NEWS.d/next/Security/2024-05-23-11-47-48.gh-issue-119451.qkJe9-.rst
@@ -0,0 +1,5 @@
+Fix a potential memory denial of service in the :mod:`http.client` module.
+When connecting to a malicious server, it could cause
+an arbitrary amount of memory to be allocated.
+This could have led to symptoms including a :exc:`MemoryError`, swapping, out
+of memory (OOM) killed processes or containers, or even system crashes.

90
SOURCES/00473-cve-2026-0865.patch Normal file
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@ -0,0 +1,90 @@
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Seth Michael Larson <seth@python.org>
Date: Sat, 17 Jan 2026 11:46:21 -0600
Subject: 00473: CVE-2026-0865
gh-143916: Reject control characters in wsgiref.headers.Headers (GH-143917)
* Add 'test.support' fixture for C0 control characters
* gh-143916: Reject control characters in wsgiref.headers.Headers
---
Lib/test/support/__init__.py | 7 +++++++
Lib/test/test_wsgiref.py | 12 +++++++++++-
Lib/wsgiref/headers.py | 3 +++
.../2026-01-16-11-07-36.gh-issue-143916.dpWeOD.rst | 2 ++
4 files changed, 23 insertions(+), 1 deletion(-)
create mode 100644 Misc/NEWS.d/next/Security/2026-01-16-11-07-36.gh-issue-143916.dpWeOD.rst
diff --git a/Lib/test/support/__init__.py b/Lib/test/support/__init__.py
index 79e3d1c642..9270f3f8d6 100644
--- a/Lib/test/support/__init__.py
+++ b/Lib/test/support/__init__.py
@@ -2282,3 +2282,10 @@ def copy_python_src_ignore(path, names):
#Windows doesn't have os.uname() but it doesn't support s390x.
skip_on_s390x = unittest.skipIf(hasattr(os, 'uname') and os.uname().machine == 's390x',
'skipped on s390x')
+
+
+def control_characters_c0() -> list[str]:
+ """Returns a list of C0 control characters as strings.
+ C0 control characters defined as the byte range 0x00-0x1F, and 0x7F.
+ """
+ return [chr(c) for c in range(0x00, 0x20)] + ["\x7F"]
diff --git a/Lib/test/test_wsgiref.py b/Lib/test/test_wsgiref.py
index 9316d0ecbc..28e3656632 100644
--- a/Lib/test/test_wsgiref.py
+++ b/Lib/test/test_wsgiref.py
@@ -1,6 +1,6 @@
from unittest import mock
from test import support
-from test.support import socket_helper
+from test.support import socket_helper, control_characters_c0
from test.test_httpservers import NoLogRequestHandler
from unittest import TestCase
from wsgiref.util import setup_testing_defaults
@@ -503,6 +503,16 @@ def testExtras(self):
'\r\n'
)
+ def testRaisesControlCharacters(self):
+ headers = Headers()
+ for c0 in control_characters_c0():
+ self.assertRaises(ValueError, headers.__setitem__, f"key{c0}", "val")
+ self.assertRaises(ValueError, headers.__setitem__, "key", f"val{c0}")
+ self.assertRaises(ValueError, headers.add_header, f"key{c0}", "val", param="param")
+ self.assertRaises(ValueError, headers.add_header, "key", f"val{c0}", param="param")
+ self.assertRaises(ValueError, headers.add_header, "key", "val", param=f"param{c0}")
+
+
class ErrorHandler(BaseCGIHandler):
"""Simple handler subclass for testing BaseHandler"""
diff --git a/Lib/wsgiref/headers.py b/Lib/wsgiref/headers.py
index fab851c5a4..fd98e85d75 100644
--- a/Lib/wsgiref/headers.py
+++ b/Lib/wsgiref/headers.py
@@ -9,6 +9,7 @@
# existence of which force quoting of the parameter value.
import re
tspecials = re.compile(r'[ \(\)<>@,;:\\"/\[\]\?=]')
+_control_chars_re = re.compile(r'[\x00-\x1F\x7F]')
def _formatparam(param, value=None, quote=1):
"""Convenience function to format and return a key=value pair.
@@ -41,6 +42,8 @@ def __init__(self, headers=None):
def _convert_string_type(self, value):
"""Convert/check value type."""
if type(value) is str:
+ if _control_chars_re.search(value):
+ raise ValueError("Control characters not allowed in headers")
return value
raise AssertionError("Header names/values must be"
" of type str (got {0})".format(repr(value)))
diff --git a/Misc/NEWS.d/next/Security/2026-01-16-11-07-36.gh-issue-143916.dpWeOD.rst b/Misc/NEWS.d/next/Security/2026-01-16-11-07-36.gh-issue-143916.dpWeOD.rst
new file mode 100644
index 0000000000..44bd0b2705
--- /dev/null
+++ b/Misc/NEWS.d/next/Security/2026-01-16-11-07-36.gh-issue-143916.dpWeOD.rst
@@ -0,0 +1,2 @@
+Reject C0 control characters within wsgiref.headers.Headers fields, values,
+and parameters.

61
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@ -0,0 +1,61 @@
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Seth Michael Larson <seth@python.org>
Date: Tue, 20 Jan 2026 14:45:42 -0600
Subject: 00474: CVE-2025-15366
gh-143921: Reject control characters in IMAP commands
(cherry-picked from commit 6262704b134db2a4ba12e85ecfbd968534f28b45)
---
Lib/imaplib.py | 4 +++-
Lib/test/test_imaplib.py | 6 ++++++
.../Security/2026-01-16-11-41-06.gh-issue-143921.AeCOor.rst | 1 +
3 files changed, 10 insertions(+), 1 deletion(-)
create mode 100644 Misc/NEWS.d/next/Security/2026-01-16-11-41-06.gh-issue-143921.AeCOor.rst
diff --git a/Lib/imaplib.py b/Lib/imaplib.py
index 20b86c35d3..bc7628d17a 100644
--- a/Lib/imaplib.py
+++ b/Lib/imaplib.py
@@ -132,7 +132,7 @@
# We compile these in _mode_xxx.
_Literal = br'.*{(?P<size>\d+)}$'
_Untagged_status = br'\* (?P<data>\d+) (?P<type>[A-Z-]+)( (?P<data2>.*))?'
-
+_control_chars = re.compile(b'[\x00-\x1F\x7F]')
class IMAP4:
@@ -994,6 +994,8 @@ def _command(self, name, *args):
if arg is None: continue
if isinstance(arg, str):
arg = bytes(arg, self._encoding)
+ if _control_chars.search(arg):
+ raise ValueError("Control characters not allowed in commands")
data = data + b' ' + arg
literal = self.literal
diff --git a/Lib/test/test_imaplib.py b/Lib/test/test_imaplib.py
index 7665532d01..caf0884719 100644
--- a/Lib/test/test_imaplib.py
+++ b/Lib/test/test_imaplib.py
@@ -510,6 +510,12 @@ def test_login(self):
self.assertEqual(data[0], b'LOGIN completed')
self.assertEqual(client.state, 'AUTH')
+ def test_control_characters(self):
+ client, _ = self._setup(SimpleIMAPHandler)
+ for c0 in support.control_characters_c0():
+ with self.assertRaises(ValueError):
+ client.login(f'user{c0}', 'pass')
+
def test_logout(self):
client, _ = self._setup(SimpleIMAPHandler)
typ, data = client.login('user', 'pass')
diff --git a/Misc/NEWS.d/next/Security/2026-01-16-11-41-06.gh-issue-143921.AeCOor.rst b/Misc/NEWS.d/next/Security/2026-01-16-11-41-06.gh-issue-143921.AeCOor.rst
new file mode 100644
index 0000000000..4e13fe92bc
--- /dev/null
+++ b/Misc/NEWS.d/next/Security/2026-01-16-11-41-06.gh-issue-143921.AeCOor.rst
@@ -0,0 +1 @@
+Reject control characters in IMAP commands.

61
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@ -0,0 +1,61 @@
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Seth Michael Larson <seth@python.org>
Date: Tue, 20 Jan 2026 14:46:32 -0600
Subject: 00475: CVE-2025-15367
gh-143923: Reject control characters in POP3 commands
(cherry-picked from commit b234a2b67539f787e191d2ef19a7cbdce32874e7)
---
Lib/poplib.py | 2 ++
Lib/test/test_poplib.py | 8 ++++++++
.../2026-01-16-11-43-47.gh-issue-143923.DuytMe.rst | 1 +
3 files changed, 11 insertions(+)
create mode 100644 Misc/NEWS.d/next/Security/2026-01-16-11-43-47.gh-issue-143923.DuytMe.rst
diff --git a/Lib/poplib.py b/Lib/poplib.py
index 0f8587317c..f563030f7f 100644
--- a/Lib/poplib.py
+++ b/Lib/poplib.py
@@ -122,6 +122,8 @@ def _putline(self, line):
def _putcmd(self, line):
if self._debugging: print('*cmd*', repr(line))
line = bytes(line, self.encoding)
+ if re.search(b'[\x00-\x1F\x7F]', line):
+ raise ValueError('Control characters not allowed in commands')
self._putline(line)
diff --git a/Lib/test/test_poplib.py b/Lib/test/test_poplib.py
index 49ba993197..b56bc3535e 100644
--- a/Lib/test/test_poplib.py
+++ b/Lib/test/test_poplib.py
@@ -12,6 +12,7 @@
import unittest
from unittest import TestCase, skipUnless
from test import support as test_support
+from test.support import control_characters_c0
from test.support import hashlib_helper
from test.support import socket_helper
from test.support import threading_helper
@@ -367,6 +368,13 @@ def test_quit(self):
self.assertIsNone(self.client.sock)
self.assertIsNone(self.client.file)
+ def test_control_characters(self):
+ for c0 in control_characters_c0():
+ with self.assertRaises(ValueError):
+ self.client.user(f'user{c0}')
+ with self.assertRaises(ValueError):
+ self.client.pass_(f'{c0}pass')
+
@requires_ssl
def test_stls_capa(self):
capa = self.client.capa()
diff --git a/Misc/NEWS.d/next/Security/2026-01-16-11-43-47.gh-issue-143923.DuytMe.rst b/Misc/NEWS.d/next/Security/2026-01-16-11-43-47.gh-issue-143923.DuytMe.rst
new file mode 100644
index 0000000000..3cde4df3e0
--- /dev/null
+++ b/Misc/NEWS.d/next/Security/2026-01-16-11-43-47.gh-issue-143923.DuytMe.rst
@@ -0,0 +1 @@
+Reject control characters in POP3 commands.

108
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@ -0,0 +1,108 @@
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: "Miss Islington (bot)"
<31488909+miss-islington@users.noreply.github.com>
Date: Sun, 25 Jan 2026 18:09:56 +0100
Subject: 00476: CVE-2026-1299
gh-144125: email: verify headers are sound in BytesGenerator
(cherry picked from commit 052e55e7d44718fe46cbba0ca995cb8fcc359413)
Co-authored-by: Seth Michael Larson <seth@python.org>
Co-authored-by: Denis Ledoux <dle@odoo.com>
Co-authored-by: Denis Ledoux <5822488+beledouxdenis@users.noreply.github.com>
Co-authored-by: Petr Viktorin <302922+encukou@users.noreply.github.com>
Co-authored-by: Bas Bloemsaat <1586868+basbloemsaat@users.noreply.github.com>
---
Lib/email/generator.py | 12 +++++++++++-
Lib/test/test_email/test_generator.py | 4 +++-
Lib/test/test_email/test_policy.py | 6 +++++-
.../2026-01-21-12-34-05.gh-issue-144125.TAz5uo.rst | 4 ++++
4 files changed, 23 insertions(+), 3 deletions(-)
create mode 100644 Misc/NEWS.d/next/Security/2026-01-21-12-34-05.gh-issue-144125.TAz5uo.rst
diff --git a/Lib/email/generator.py b/Lib/email/generator.py
index 563ca17072..61dc942b83 100644
--- a/Lib/email/generator.py
+++ b/Lib/email/generator.py
@@ -22,6 +22,7 @@
NLCRE = re.compile(r'\r\n|\r|\n')
fcre = re.compile(r'^From ', re.MULTILINE)
NEWLINE_WITHOUT_FWSP = re.compile(r'\r\n[^ \t]|\r[^ \n\t]|\n[^ \t]')
+NEWLINE_WITHOUT_FWSP_BYTES = re.compile(br'\r\n[^ \t]|\r[^ \n\t]|\n[^ \t]')
class Generator:
@@ -429,7 +430,16 @@ def _write_headers(self, msg):
# This is almost the same as the string version, except for handling
# strings with 8bit bytes.
for h, v in msg.raw_items():
- self._fp.write(self.policy.fold_binary(h, v))
+ folded = self.policy.fold_binary(h, v)
+ if self.policy.verify_generated_headers:
+ linesep = self.policy.linesep.encode()
+ if not folded.endswith(linesep):
+ raise HeaderWriteError(
+ f'folded header does not end with {linesep!r}: {folded!r}')
+ if NEWLINE_WITHOUT_FWSP_BYTES.search(folded.removesuffix(linesep)):
+ raise HeaderWriteError(
+ f'folded header contains newline: {folded!r}')
+ self._fp.write(folded)
# A blank line always separates headers from body
self.write(self._NL)
diff --git a/Lib/test/test_email/test_generator.py b/Lib/test/test_email/test_generator.py
index d29400f0ed..a641f871dd 100644
--- a/Lib/test/test_email/test_generator.py
+++ b/Lib/test/test_email/test_generator.py
@@ -264,7 +264,7 @@ class TestGenerator(TestGeneratorBase, TestEmailBase):
typ = str
def test_verify_generated_headers(self):
- """gh-121650: by default the generator prevents header injection"""
+ # gh-121650: by default the generator prevents header injection
class LiteralHeader(str):
name = 'Header'
def fold(self, **kwargs):
@@ -285,6 +285,8 @@ def fold(self, **kwargs):
with self.assertRaises(email.errors.HeaderWriteError):
message.as_string()
+ with self.assertRaises(email.errors.HeaderWriteError):
+ message.as_bytes()
class TestBytesGenerator(TestGeneratorBase, TestEmailBase):
diff --git a/Lib/test/test_email/test_policy.py b/Lib/test/test_email/test_policy.py
index baa35fd68e..71ec0febb0 100644
--- a/Lib/test/test_email/test_policy.py
+++ b/Lib/test/test_email/test_policy.py
@@ -296,7 +296,7 @@ def test_short_maxlen_error(self):
policy.fold("Subject", subject)
def test_verify_generated_headers(self):
- """Turning protection off allows header injection"""
+ # Turning protection off allows header injection
policy = email.policy.default.clone(verify_generated_headers=False)
for text in (
'Header: Value\r\nBad: Injection\r\n',
@@ -319,6 +319,10 @@ def fold(self, **kwargs):
message.as_string(),
f"{text}\nBody",
)
+ self.assertEqual(
+ message.as_bytes(),
+ f"{text}\nBody".encode(),
+ )
# XXX: Need subclassing tests.
# For adding subclassed objects, make sure the usual rules apply (subclass
diff --git a/Misc/NEWS.d/next/Security/2026-01-21-12-34-05.gh-issue-144125.TAz5uo.rst b/Misc/NEWS.d/next/Security/2026-01-21-12-34-05.gh-issue-144125.TAz5uo.rst
new file mode 100644
index 0000000000..e6333e7249
--- /dev/null
+++ b/Misc/NEWS.d/next/Security/2026-01-21-12-34-05.gh-issue-144125.TAz5uo.rst
@@ -0,0 +1,4 @@
+:mod:`~email.generator.BytesGenerator` will now refuse to serialize (write) headers
+that are unsafely folded or delimited; see
+:attr:`~email.policy.Policy.verify_generated_headers`. (Contributed by Bas
+Bloemsaat and Petr Viktorin in :gh:`121650`).

70
SPECS/python3.11.spec
View File

@ -20,7 +20,7 @@ URL: https://www.python.org/
#global prerel ...
%global upstream_version %{general_version}%{?prerel}
Version: %{general_version}%{?prerel:~%{prerel}}
Release: 3%{?dist}
Release: 7%{?dist}
License: Python
@ -391,6 +391,56 @@ Patch462: 00462-fix-pyssl_seterror-handling-ssl_error_syscall.patch
# Upstream issue: https://github.com/python/cpython/issues/130577
Patch467: 00467-CVE-2025-8194.patch
# 00471 # f7ffc7e947b58a4d33c7f5bb69674af20fe4875d
# CVE-2025-12084
#
# * gh-142145: Remove quadratic behavior in node ID cache clearing (GH-142146)
# * gh-142754: Ensure that Element & Attr instances have the ownerDocument attribute (GH-142794)
Patch471: 00471-cve-2025-12084.patch
# 00472 # 2ba215eaba508b2cdd7c3acfdf3b9a6e32872274
# CVE-2025-13836
#
# gh-119451: Fix a potential denial of service in http.client (GH-119454)
#
# Reading the whole body of the HTTP response could cause OOM if
# the Content-Length value is too large even if the server does not send
# a large amount of data. Now the HTTP client reads large data by chunks,
# therefore the amount of consumed memory is proportional to the amount
# of sent data.
Patch472: 00472-cve-2025-13836.patch
# 00473 # 3c13163c5c0be4d073b081f19ad52c007c126d53
# CVE-2026-0865
#
# gh-143916: Reject control characters in wsgiref.headers.Headers (GH-143917)
#
# * Add 'test.support' fixture for C0 control characters
# * gh-143916: Reject control characters in wsgiref.headers.Headers
Patch473: 00473-cve-2026-0865.patch
# 00474 # 837ddca0372fa87ff9cee47142200caa21e77def
# CVE-2025-15366
#
# gh-143921: Reject control characters in IMAP commands
#
# (cherry-picked from commit 6262704b134db2a4ba12e85ecfbd968534f28b45)
Patch474: 00474-cve-2025-15366.patch
# 00475 # 3748209a316662d4e85981ca1a7418547a1d25c6
# CVE-2025-15367
#
# gh-143923: Reject control characters in POP3 commands
#
# (cherry-picked from commit b234a2b67539f787e191d2ef19a7cbdce32874e7)
Patch475: 00475-cve-2025-15367.patch
# 00476
# CVE-2026-1299
#
# gh-144125: email: verify headers are sound in BytesGenerator
Patch476: 00476-cve-2026-1299.patch
# (New patches go here ^^^)
#
# When adding new patches to "python" and "python3" in Fedora, EL, etc.,
@ -1669,6 +1719,24 @@ CheckPython optimized
# ======================================================
%changelog
* Mon Mar 09 2026 Tomáš Hrnčiar <thrnciar@redhat.com> - 3.11.13-7
- Rebuilding previous fixes for different build target
Related: RHEL-143110, RHEL-143170, RHEL-144894
* Fri Feb 27 2026 Tomáš Hrnčiar <thrnciar@redhat.com> - 3.11.13-6
- Security fixes for CVE-2026-0865, CVE-2025-15366, CVE-2025-15367 and CVE-2026-1299
Resolves: RHEL-143110
Resolves: RHEL-143170
Resolves: RHEL-144894
* Fri Jan 16 2026 Lumír Balhar <lbalhar@redhat.com> - 3.11.13-5
- Security fix for CVE-2025-13836
Resolves: RHEL-141025
* Mon Jan 12 2026 Lumír Balhar <lbalhar@redhat.com> - 3.11.13-4
- Security fix for CVE-2025-12084
Resolves: RHEL-135395
* Thu Aug 21 2025 Charalampos Stratakis <cstratak@redhat.com> - 3.11.13-3
- Security fix for CVE-2025-8194
Resolves: RHEL-106365