pytest: bind to localhost

Pointed out by CodeQL

Fixes https://github.com/curl/curl/security/code-scanning/298

Closes #18506

diff --git a/tests/http/testenv/ports.py b/tests/http/testenv/ports.py
index 97159eb0cc4b924b5b119e0292636c7ca7fba27e..f3d2348fa679e1c79d115d87c70cea76c4dbccc3 100644 (file)
--- a/tests/http/testenv/ports.py
+++ b/tests/http/testenv/ports.py
@@ -41,7 +41,7 @@ def alloc_port_set(port_specs: Dict[str, int]) -> Dict[str, int]:
     for name, ptype in port_specs.items():
         try:
             s = socket.socket(type=ptype)
-            s.bind(('', 0))
+            s.bind(('127.0.0.1', 0))
             ports[name] = s.getsockname()[1]
             socks.append(s)
         except Exception as e: