From e40df6d48a1cbab56f5d15016cc861a503423cfe Mon Sep 17 00:00:00 2001
From: Patrick Griffis <pgriffis@igalia.com>
Date: Sun, 8 Dec 2024 20:00:35 -0600
Subject: [PATCH] auth-digest: Handle missing realm in authenticate header

Upstream-Status: Backport [https://gitlab.gnome.org/GNOME/libsoup/-/commit/e40df6d48a1cbab56f5d15016cc861a503423cfe]
CVE: CVE-2025-32910
Signed-off-by: Vijay Anusuri <vanusuri@mvista.com>
---
 libsoup/auth/soup-auth-digest.c |  3 ++
 tests/auth-test.c               | 50 +++++++++++++++++++++++++++++++++
 2 files changed, 53 insertions(+)

diff --git a/libsoup/auth/soup-auth-digest.c b/libsoup/auth/soup-auth-digest.c
index 2e81849af..4f12e87a5 100644
--- a/libsoup/auth/soup-auth-digest.c
+++ b/libsoup/auth/soup-auth-digest.c
@@ -148,6 +148,9 @@ soup_auth_digest_update (SoupAuth *auth, SoupMessage *msg,
 	guint qop_options;
 	gboolean ok = TRUE;
 
+        if (!soup_auth_get_realm (auth))
+                return FALSE;
+
 	g_free (priv->domain);
 	g_free (priv->nonce);
 	g_free (priv->opaque);
diff --git a/tests/auth-test.c b/tests/auth-test.c
index 158fdac10..3066e904a 100644
--- a/tests/auth-test.c
+++ b/tests/auth-test.c
@@ -1866,6 +1866,55 @@ do_multiple_digest_algorithms (void)
 	soup_test_server_quit_unref (server);
 }
 
+static void
+on_request_read_for_missing_realm (SoupServer        *server,
+                                   SoupServerMessage *msg,
+                                   gpointer           user_data)
+{
+        SoupMessageHeaders *response_headers = soup_server_message_get_response_headers (msg);
+        soup_message_headers_replace (response_headers, "WWW-Authenticate", "Digest qop=\"auth\"");
+}
+
+static void
+do_missing_realm_test (void)
+{
+        SoupSession *session;
+        SoupMessage *msg;
+        SoupServer *server;
+        SoupAuthDomain *digest_auth_domain;
+        gint status;
+        GUri *uri;
+
+        server = soup_test_server_new (SOUP_TEST_SERVER_IN_THREAD);
+	soup_server_add_handler (server, NULL,
+				 server_callback, NULL, NULL);
+	uri = soup_test_server_get_uri (server, "http", NULL);
+
+	digest_auth_domain = soup_auth_domain_digest_new (
+		"realm", "auth-test",
+		"auth-callback", server_digest_auth_callback,
+		NULL);
+        soup_auth_domain_add_path (digest_auth_domain, "/");
+	soup_server_add_auth_domain (server, digest_auth_domain);
+        g_object_unref (digest_auth_domain);
+
+        g_signal_connect (server, "request-read",
+                          G_CALLBACK (on_request_read_for_missing_realm),
+                          NULL);
+
+        session = soup_test_session_new (NULL);
+        msg = soup_message_new_from_uri ("GET", uri);
+        g_signal_connect (msg, "authenticate",
+                          G_CALLBACK (on_digest_authenticate),
+                          NULL);
+
+        status = soup_test_session_send_message (session, msg);
+
+        g_assert_cmpint (status, ==, SOUP_STATUS_UNAUTHORIZED);
+	g_uri_unref (uri);
+	soup_test_server_quit_unref (server);
+}
+
 int
 main (int argc, char **argv)
 {
@@ -1899,6 +1948,7 @@ main (int argc, char **argv)
 	g_test_add_func ("/auth/auth-uri", do_auth_uri_test);
         g_test_add_func ("/auth/cancel-request-on-authenticate", do_cancel_request_on_authenticate);
         g_test_add_func ("/auth/multiple-algorithms", do_multiple_digest_algorithms);
+        g_test_add_func ("/auth/missing-realm", do_missing_realm_test);
 
 	ret = g_test_run ();
 
-- 
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