python3-django: Fix CVE-2024-41989

An issue was discovered in Django 5.0 before 5.0.8 and 4.2 before 4.2.15. The
floatformat template filter is subject to significant memory consumption when
given a string representation of a number in scientific notation with a large
exponent.

Reference:
https://nvd.nist.gov/vuln/detail/CVE-2024-41989

Upstream-patches:
https://github.com/django/django/commit/08c5a787262c1ae57f6517d4574b54a5fcaad124
https://github.com/django/django/commit/4b066bde692078b194709d517b27e55defae787c
https://github.com/django/django/commit/dcd974698301a38081c141ccba6dcafa5ed2c80e
https://github.com/django/django/commit/fc76660f589ac07e45e9cd34ccb8087aeb11904b

Signed-off-by: Soumya Sambu <soumya.sambu@windriver.com>
Signed-off-by: Armin Kuster <akuster808@gmail.com>

1 files changed, 57 insertions, 0 deletions

diff --git a/meta-python/recipes-devtools/python/python3-django/CVE-2024-41989-0003.patch b/meta-python/recipes-devtools/python/python3-django/CVE-2024-41989-0003.patch
new file mode 100644
index 0000000000..649a58f822
--- /dev/null
+++ b/meta-python/recipes-devtools/python/python3-django/CVE-2024-41989-0003.patch
@@ -0,0 +1,57 @@
+From dcd974698301a38081c141ccba6dcafa5ed2c80e Mon Sep 17 00:00:00 2001
+From: "Panagiotis H.M. Issaris" <takis@issaris.com>
+Date: Wed, 22 Feb 2023 20:46:16 +0100
+Subject: [PATCH] Fixed #34363 -- Fixed floatformat crash on zero with trailing
+ zeros.
+
+Regression in 08c5a787262c1ae57f6517d4574b54a5fcaad124.
+Follow up to 4b066bde692078b194709d517b27e55defae787c.
+
+CVE: CVE-2024-41989
+
+Upstream-Status: Backport [https://github.com/django/django/commit/dcd974698301a38081c141ccba6dcafa5ed2c80e]
+
+Signed-off-by: Soumya Sambu <soumya.sambu@windriver.com>
+---
+ django/template/defaultfilters.py                     | 3 ++-
+ tests/template_tests/filter_tests/test_floatformat.py | 4 ++++
+ 2 files changed, 6 insertions(+), 1 deletion(-)
+
+diff --git a/django/template/defaultfilters.py b/django/template/defaultfilters.py
+index e72593b..1aba321 100644
+--- a/django/template/defaultfilters.py
++++ b/django/template/defaultfilters.py
+@@ -2,7 +2,7 @@
+ import random as random_module
+ import re
+ import types
+-from decimal import ROUND_HALF_UP, Context, Decimal, InvalidOperation
++from decimal import ROUND_HALF_UP, Context, Decimal, InvalidOperation, getcontext
+ from functools import wraps
+ from operator import itemgetter
+ from pprint import pformat
+@@ -149,6 +149,7 @@ def floatformat(text, arg=-1):
+     units = len(tupl[1])
+     units += -tupl[2] if m else tupl[2]
+     prec = abs(p) + units + 1
++    prec = max(getcontext().prec, prec)
+
+     # Avoid conversion to scientific notation by accessing `sign`, `digits`,
+     # and `exponent` from Decimal.as_tuple() directly.
+diff --git a/tests/template_tests/filter_tests/test_floatformat.py b/tests/template_tests/filter_tests/test_floatformat.py
+index 538f501..413ba4b 100644
+--- a/tests/template_tests/filter_tests/test_floatformat.py
++++ b/tests/template_tests/filter_tests/test_floatformat.py
+@@ -67,6 +67,10 @@ class FunctionTests(SimpleTestCase):
+         self.assertEqual(floatformat(0.000000000000000000015, 20), '0.00000000000000000002')
+         self.assertEqual(floatformat("0.00", 0), "0")
+         self.assertEqual(floatformat(Decimal("0.00"), 0), "0")
++        self.assertEqual(floatformat("0.0000", 2), "0.00")
++        self.assertEqual(floatformat(Decimal("0.0000"), 2), "0.00")
++        self.assertEqual(floatformat("0.000000", 4), "0.0000")
++        self.assertEqual(floatformat(Decimal("0.000000"), 4), "0.0000")
+
+     def test_infinity(self):
+         pos_inf = float(1e30000)
+--
+2.40.0