Fixed CVE-2024-42005 -- Mitigated QuerySet.values() SQL injection attacks against JSON fields.

Thanks Eyal (eyalgabay) for the report.

5 files changed, 38 insertions, 2 deletions

diff --git a/django/db/models/sql/query.py b/django/db/models/sql/query.py
index 09916277bc..c1e2fc1d4f 100644
--- a/django/db/models/sql/query.py
+++ b/django/db/models/sql/query.py
@@ -2461,6 +2461,8 @@ class Query(BaseExpression):
 
         selected = {}
         if fields:
+            for field in fields:
+                self.check_alias(field)
             field_names = []
             extra_names = []
             annotation_names = []
diff --git a/docs/releases/4.2.15.txt b/docs/releases/4.2.15.txt
index 1c6a1c7ede..b1d4684596 100644
--- a/docs/releases/4.2.15.txt
+++ b/docs/releases/4.2.15.txt
@@ -30,6 +30,13 @@ CVE-2024-41991: Potential denial-of-service vulnerability in ``django.utils.html
 subject to a potential denial-of-service attack via certain inputs with a very
 large number of Unicode characters.
 
+CVE-2024-42005: Potential SQL injection in ``QuerySet.values()`` and ``values_list()``
+======================================================================================
+
+:meth:`.QuerySet.values` and :meth:`~.QuerySet.values_list` methods on models
+with a ``JSONField`` were subject to SQL injection in column aliases, via a
+crafted JSON object key as a passed ``*arg``.
+
 Bugfixes
 ========
 
diff --git a/docs/releases/5.0.8.txt b/docs/releases/5.0.8.txt
index 2a0823d0ca..37f51f71c7 100644
--- a/docs/releases/5.0.8.txt
+++ b/docs/releases/5.0.8.txt
@@ -30,6 +30,13 @@ CVE-2024-41991: Potential denial-of-service vulnerability in ``django.utils.html
 subject to a potential denial-of-service attack via certain inputs with a very
 large number of Unicode characters.
 
+CVE-2024-42005: Potential SQL injection in ``QuerySet.values()`` and ``values_list()``
+======================================================================================
+
+:meth:`.QuerySet.values` and :meth:`~.QuerySet.values_list` methods on models
+with a ``JSONField`` were subject to SQL injection in column aliases, via a
+crafted JSON object key as a passed ``*arg``.
+
 Bugfixes
 ========
 
diff --git a/tests/expressions/models.py b/tests/expressions/models.py
index 31891a13d7..3909bdf0cd 100644
--- a/tests/expressions/models.py
+++ b/tests/expressions/models.py
@@ -115,3 +115,10 @@ class UUID(models.Model):
 
 class Text(models.Model):
     name = models.TextField()
+
+
+class JSONFieldModel(models.Model):
+    data = models.JSONField(null=True)
+
+    class Meta:
+        required_db_features = {"supports_json_field"}
diff --git a/tests/expressions/test_queryset_values.py b/tests/expressions/test_queryset_values.py
index 80addef37b..47bd1358de 100644
--- a/tests/expressions/test_queryset_values.py
+++ b/tests/expressions/test_queryset_values.py
@@ -1,7 +1,7 @@
 from django.db.models import F, Sum
-from django.test import TestCase
+from django.test import TestCase, skipUnlessDBFeature
 
-from .models import Company, Employee
+from .models import Company, Employee, JSONFieldModel
 
 
 class ValuesExpressionsTests(TestCase):
@@ -43,6 +43,19 @@ class ValuesExpressionsTests(TestCase):
         with self.assertRaisesMessage(ValueError, msg):
             Company.objects.values(**{crafted_alias: F("ceo__salary")})
 
+    @skipUnlessDBFeature("supports_json_field")
+    def test_values_expression_alias_sql_injection_json_field(self):
+        crafted_alias = """injected_name" from "expressions_company"; --"""
+        msg = (
+            "Column aliases cannot contain whitespace characters, quotation marks, "
+            "semicolons, or SQL comments."
+        )
+        with self.assertRaisesMessage(ValueError, msg):
+            JSONFieldModel.objects.values(f"data__{crafted_alias}")
+
+        with self.assertRaisesMessage(ValueError, msg):
+            JSONFieldModel.objects.values_list(f"data__{crafted_alias}")
+
     def test_values_expression_group_by(self):
         # values() applies annotate() first, so values selected are grouped by
         # id, not firstname.