* test/modules/core: Adds regression test for CGI env var override

Submitted by: Giannis Christodoulou <io.xristod gmail.com>
Github: closes #589


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1930794 13f79535-47bb-0310-9956-ffa450edef68

Author: notroj

test/modules/core/htdocs/cgi/env_parameters.py

@@ -0,0 +1,14 @@
+#!/usr/bin/env python3
+
+import os
+import json
+
+print("Content-Type: application/json")
+print()
+
+data = {
+    "REQUEST_METHOD": os.getenv("REQUEST_METHOD", ""),
+    "QUERY_STRING": os.getenv("QUERY_STRING", ""),
+}
+
+print(json.dumps(data, indent=2))

test/modules/core/test_003_cgi_env_vars.py

@@ -0,0 +1,33 @@
+import pytest
+
+from pyhttpd.conf import HttpdConf
+
+class TestCGIEnvVars:
+
+    @pytest.fixture(autouse=True, scope='class')
+    def _class_scope(self, env):
+        conf = HttpdConf(env, extras={
+            'base': f"""
+        <Directory "{env.gen_dir}">
+            AllowOverride None
+            Options +ExecCGI
+        </Directory>
+        SetEnv REQUEST-METHOD OVERRIDDEN
+        SetEnv QUERY.STRING OVERRIDDEN
+        """,
+        })
+        conf.add_vhost_cgi()
+        conf.install()
+        assert env.apache_restart() == 0
+
+    def test_cgi_003_01(self, env):
+        """
+        CVE-2025-65082:
+        Configuration-defined env vars must not override
+        server-calculated CGI env vars.
+        """
+        url = env.mkurl("http", "cgi", "/env_parameters.py?x=123")
+        r = env.curl_get(url)
+        assert r.response["status"] == 200
+        assert r.response["json"]["REQUEST_METHOD"] == "GET"
+        assert r.response["json"]["QUERY_STRING"] == "x=123"