+ raise ValidationError(self.message, code=self.code)
+ # Check if the scheme is valid.
+ scheme = value.split('://')[0].lower()
+@@ -190,7 +191,9 @@ class EmailValidator:
+ self.domain_whitelist = whitelist
+
+ def __call__(self, value):
+- if not value or '@' not in value:
++ # The maximum length of an email is 320 characters per RFC
3696
++ # section 3.
++ if not value or '@' not in value or len(value) > 320:
+ raise ValidationError(self.message, code=self.code)
+
+ user_part, domain_part = value.rsplit('@', 1)
+diff --git a/django/forms/fields.py b/django/forms/fields.py
+index a977256..f939338 100644
+--- a/django/forms/fields.py
++++ b/django/forms/fields.py
+@@ -542,6 +542,9 @@ class FileField(Field):
+ def __init__(self, *, max_length=None, allow_empty_file=False,
**kwargs):
+ self.max_length = max_length
+ self.allow_empty_file = allow_empty_file
++ # The default maximum length of an email is 320 characters
per RFC 3696
++ # section 3.
++ kwargs.setdefault("max_length", 320)
+ super().__init__(**kwargs)
+
+ def to_python(self, data):
+diff --git a/docs/ref/forms/fields.txt b/docs/ref/forms/fields.txt
+index 6f76d0d..3a888ef 100644
+--- a/docs/ref/forms/fields.txt
++++ b/docs/ref/forms/fields.txt
+@@ -592,6 +592,10 @@ For each field, we describe the default widget
used if you don't specify
+ Has two optional arguments for validation, ``max_length`` and
``min_length``.
+ If provided, these arguments ensure that the string is at most
or at least the
+ given length.
++ ``empty_value`` which work just as they do for
:class:`CharField`. The
++ ``max_length`` argument defaults to 320 (see
:rfc:`3696#section-3`).
++
++ The default value for ``max_length`` was changed to 320
characters.
+
+ ``FileField``
+ -------------
+diff --git a/docs/ref/validators.txt b/docs/ref/validators.txt
+index 75d1394..4178a1f 100644
+--- a/docs/ref/validators.txt
++++ b/docs/ref/validators.txt
+@@ -125,6 +125,11 @@ to, or in lieu of custom ``field.clean()``
methods.
+ :param code: If not ``None``, overrides :attr:`code`.
+ :param whitelist: If not ``None``, overrides :attr:`whitelist`.
+
++ An :class:`EmailValidator` ensures that a value looks like an
email, and
++ raises a :exc:`~django.core.exceptions.ValidationError` with
++ :attr:`message` and :attr:`code` if it doesn't. Values longer
than 320
++ characters are always considered invalid.
++
+ .. attribute:: message
+
+ The error message used by
+@@ -145,13 +150,17 @@ to, or in lieu of custom ``field.clean()``
methods.
+ ``['localhost']``. Other domains that don't contain a dot
won't pass
+ validation, so you'd need to whitelist them as necessary.
+
++ In older versions, values longer than 320 characters could
be
++ considered valid.
++
+ ``URLValidator``
+ ----------------
+
+ .. class:: URLValidator(schemes=None, regex=None, message=None,
code=None)
+
+ A :class:`RegexValidator` that ensures a value looks like a
URL, and raises
+- an error code of ``'invalid'`` if it doesn't.
++ an error code of ``'invalid'`` if it doesn't. Values longer
than
++ :attr:`max_length` characters are always considered invalid.
+
+ Loopback addresses and reserved IP spaces are considered valid.
Literal
+ IPv6 addresses (:rfc:`3986#section-3.2.2`) and unicode domains
are both
+@@ -168,6 +177,14 @@ to, or in lieu of custom ``field.clean()``
methods.
+
+ .. _valid URI schemes:
https://www.iana.org/assignments/uri-schemes/uri-schemes.xhtml
+
++ .. attribute:: max_length
++
++ The maximum length of values that could be considered
valid. Defaults
++ to 2048 characters.
++
++ In older versions, values longer than 2048 characters could
be
++ considered valid.
++
+ ``validate_email``
+ ------------------
+
+diff --git a/docs/releases/2.2.28.txt b/docs/releases/2.2.28.txt
+index 854c6b0..ab4884b 100644
+--- a/docs/releases/2.2.28.txt
++++ b/docs/releases/2.2.28.txt
+@@ -38,3 +38,12 @@ keep the old behavior, set
``allow_multiple_selected`` to ``True``.
+
+ For more details on using the new attribute and handling of
multiple files
+ through a single field, see :ref:`uploading_multiple_files`.
++
++Backporting the CVE-2023-36053 fix on Django 2.2.28.
++
++CVE-2023-36053: Potential regular expression denial of service
vulnerability in ``EmailValidator``/``URLValidator``
++===================================================================
================================================
++
++``EmailValidator`` and ``URLValidator`` were subject to potential
regular
++expression denial of service attack via a very large number of
domain name
++labels of emails and URLs.
+diff --git a/tests/forms_tests/field_tests/test_emailfield.py
b/tests/forms_tests/field_tests/test_emailfield.py
+index 826524a..fe5b644 100644
+--- a/tests/forms_tests/field_tests/test_emailfield.py
++++ b/tests/forms_tests/field_tests/test_emailfield.py
+@@ -8,7 +8,10 @@ class EmailFieldTest(FormFieldAssertionsMixin,
SimpleTestCase):
+
+ def test_emailfield_1(self):
+ f = EmailField()
+- self.assertWidgetRendersTo(f, '<input type="email" name="f"
id="id_f" required>')
++ self.assertEqual(f.max_length, 320)
++ self.assertWidgetRendersTo(
++ f, '<input type="email" name="f" id="id_f"
maxlength="320" required>'
++ )
+ with self.assertRaisesMessage(ValidationError, "'This field
is required.'"):
+ f.clean('')
+ with self.assertRaisesMessage(ValidationError, "'This field
is required.'"):
+diff --git a/tests/forms_tests/tests/test_forms.py
b/tests/forms_tests/tests/test_forms.py
+index d4e421d..8893f89 100644
+--- a/tests/forms_tests/tests/test_forms.py
++++ b/tests/forms_tests/tests/test_forms.py
+@@ -422,11 +422,18 @@ class FormsTestCase(SimpleTestCase):
+ get_spam = BooleanField()
+
+ f = SignupForm(auto_id=False)
+- self.assertHTMLEqual(str(f['email']), '<input type="email"
name="email" required>')
++ self.assertHTMLEqual(
++ str(f["email"]),
++ '<input type="email" name="email" maxlength="320"
required>',
++ )
+ self.assertHTMLEqual(str(f['get_spam']), '<input
type="checkbox" name="get_spam" required>')
+
+ f = SignupForm({'email': '[email protected]', 'get_spam':
True}, auto_id=False)
+- self.assertHTMLEqual(str(f['email']), '<input type="email"
name="email" value="[email protected]" required>')
++ self.assertHTMLEqual(
++ str(f["email"]),
++ '<input type="email" name="email" maxlength="320"
value="[email protected]" '
++ "required>",
++ )
+ self.assertHTMLEqual(
+ str(f['get_spam']),
+ '<input checked type="checkbox" name="get_spam"
required>',
+@@ -2780,7 +2787,7 @@ Good luck picking a username that doesn't
already exist.</p>
+ <option value="true">Yes</option>
+ <option value="false">No</option>
+ </select></li>
+-<li><label for="id_email">Email:</label> <input type="email"
name="email" id="id_email"></li>
++<li><label for="id_email">Email:</label> <input type="email"
name="email" id="id_email" maxlength="320"></li>
+ <li class="required error"><ul class="errorlist"><li>This field is
required.</li></ul>
+ <label class="required" for="id_age">Age:</label> <input
type="number" name="age" id="id_age" required></li>"""
+ )
+@@ -2796,7 +2803,7 @@ Good luck picking a username that doesn't
already exist.</p>
+ <option value="true">Yes</option>
+ <option value="false">No</option>
+ </select></p>
+-<p><label for="id_email">Email:</label> <input type="email"
name="email" id="id_email"></p>
++<p><label for="id_email">Email:</label> <input type="email"
name="email" id="id_email" maxlength="320"></p>
+ <ul class="errorlist"><li>This field is required.</li></ul>
+ <p class="required error"><label class="required"
for="id_age">Age:</label>
+ <input type="number" name="age" id="id_age" required></p>"""
+@@ -2815,7 +2822,7 @@ Good luck picking a username that doesn't
already exist.</p>
+ <option value="false">No</option>
+ </select></td></tr>
+ <tr><th><label for="id_email">Email:</label></th><td>
+-<input type="email" name="email" id="id_email"></td></tr>
++<input type="email" name="email" id="id_email"
maxlength="320"></td></tr>
+ <tr class="required error"><th><label class="required"
for="id_age">Age:</label></th>
+ <td><ul class="errorlist"><li>This field is required.</li></ul>
+ <input type="number" name="age" id="id_age" required></td></tr>"""
+@@ -3428,7 +3435,7 @@ Good luck picking a username that doesn't
already exist.</p>
+ f = CommentForm(data, auto_id=False,
error_class=DivErrorList)
+ self.assertHTMLEqual(f.as_p(), """<p>Name: <input
type="text" name="name" maxlength="50"></p>
+ <div class="errorlist"><div class="error">Enter a valid email
address.</div></div>
+-<p>Email: <input type="email" name="email" value="invalid"
required></p>
++<p>Email: <input type="email" name="email" value="invalid"
maxlength="320" required></p>
+ <div class="errorlist"><div class="error">This field is
required.</div></div>
+ <p>Comment: <input type="text" name="comment" required></p>""")
+
+diff --git a/tests/validators/tests.py b/tests/validators/tests.py
+index 1f09fb5..8204f00 100644
+--- a/tests/validators/tests.py
++++ b/tests/validators/tests.py
+@@ -58,6 +58,7 @@ TEST_DATA = [
+
+ (validate_email, 'example@atm.%s' % ('a' * 64),
ValidationError),
+ (validate_email, 'example@%s.atm.%s' % ('b' * 64, 'a' * 63),
ValidationError),
++ (validate_email, "example@%scom" % (("a" * 63 + ".") * 100),
ValidationError),
+ (validate_email, None, ValidationError),
+ (validate_email, '', ValidationError),
+ (validate_email, 'abc', ValidationError),
+@@ -242,6 +243,16 @@ TEST_DATA = [
+ (URLValidator(EXTENDED_SCHEMES),
'git+ssh://[email protected]/example/hg-git.git', None),
+
+ (URLValidator(EXTENDED_SCHEMES), 'git://-invalid.com',
ValidationError),
++ (
++ URLValidator(),
++ "http://example."; + ("a" * 63 + ".") * 1000 + "com",
++ ValidationError,
++ ),
++ (
++ URLValidator(),
++ "http://userid:password"; + "d" * 2000 +
"@example.aaaaaaaaaaaaa.com",
++ None,
++ ),
+ # Newlines and tabs are not accepted.
+ (URLValidator(), 'http://www.djangoproject.com/\n',
ValidationError),
+ (URLValidator(), 'http://[::ffff:192.9.5.5]\n',
ValidationError),
+--
+2.40.0
diff --git a/meta-python/recipes-devtools/python/python3-
django_2.2.28.bb b/meta-python/recipes-devtools/python/python3-
django_2.2.28.bb
index 77a1a2a740..ec65a985da 100644
--- a/meta-python/recipes-devtools/python/python3-django_2.2.28.bb
+++ b/meta-python/recipes-devtools/python/python3-django_2.2.28.bb
@@ -5,7 +5,9 @@ UPSTREAM_CHECK_REGEX =
"/${PYPI_PACKAGE}/(?P<pver>(2\.2\.\d*)+)/"
inherit setuptools3
-SRC_URI += "file://CVE-2023-31047.patch"
+SRC_URI += "file://CVE-2023-31047.patch \
+ file://CVE-2023-36053.patch \
+ "
SRC_URI[sha256sum] =
"0200b657afbf1bc08003845ddda053c7641b9b24951e52acd51f6abda33a7413"
