60 lines
2.8 KiB
Diff
60 lines
2.8 KiB
Diff
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From 7d65f6c5a20f67aa9a857d0f7b0bf5de4d75be9b Mon Sep 17 00:00:00 2001
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From: Simon McVittie <smcv@collabora.com>
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Date: Wed, 8 May 2024 14:46:08 +0000
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Subject: [PATCH] gdbusconnection: Allow name owners to have the syntax of a
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well-known name
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In a D-Bus-Specification-compliant message bus, the owner of a well-known
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name is a unique name. However, ibus has its own small implementation
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of a message bus (src/ibusbus.c) in which org.freedesktop.IBus is
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special-cased to also have itself as its owner (like org.freedesktop.DBus
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on a standard message bus), and connects to that bus with the
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G_DBUS_CONNECTION_FLAGS_MESSAGE_BUS_CONNECTION flag. The ability to do
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this regressed when CVE-2024-34397 was fixed.
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Relax the checks to allow the owner of a well-known name to be any valid
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D-Bus name, even if it is not syntactically a unique name.
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Fixes: 683b14b9 "gdbus: Track name owners for signal subscriptions"
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Resolves: https://gitlab.gnome.org/GNOME/glib/-/issues/3353
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Bug-Debian: https://bugs.debian.org/1070730
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Bug-Debian: https://bugs.debian.org/1070736
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Bug-Debian: https://bugs.debian.org/1070743
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Bug-Debian: https://bugs.debian.org/1070745
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Signed-off-by: Simon McVittie <smcv@debian.org>
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---
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gio/gdbusconnection.c | 10 ++++++++--
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1 file changed, 8 insertions(+), 2 deletions(-)
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diff --git a/gio/gdbusconnection.c b/gio/gdbusconnection.c
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index ee994cecc..72e58fd77 100644
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--- a/gio/gdbusconnection.c
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+++ b/gio/gdbusconnection.c
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@@ -2380,7 +2380,10 @@ name_watcher_deliver_name_owner_changed_unlocked (SignalData *name_watcher,
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/* Our caller already checked this */
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g_assert (g_strcmp0 (name_watcher->arg0, name) == 0);
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- if (G_LIKELY (new_owner[0] == '\0' || g_dbus_is_unique_name (new_owner)))
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+ /* FIXME: This should be validating that `new_owner` is a unique name,
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+ * but IBus’ implementation of a message bus is not compliant with the spec.
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+ * See https://gitlab.gnome.org/GNOME/glib/-/issues/3353 */
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+ if (G_LIKELY (new_owner[0] == '\0' || g_dbus_is_name (new_owner)))
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name_watcher_set_name_owner_unlocked (name_watcher, new_owner);
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else
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g_warning ("Received NameOwnerChanged signal with invalid owner \"%s\" for \"%s\"",
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@@ -2432,7 +2435,10 @@ name_watcher_deliver_get_name_owner_reply_unlocked (SignalData *name_watcher,
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g_variant_get (body, "(&s)", &new_owner);
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- if (G_LIKELY (g_dbus_is_unique_name (new_owner)))
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+ /* FIXME: This should be validating that `new_owner` is a unique name,
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+ * but IBus’ implementation of a message bus is not compliant with the spec.
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+ * See https://gitlab.gnome.org/GNOME/glib/-/issues/3353 */
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+ if (G_LIKELY (g_dbus_is_name (new_owner)))
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name_watcher_set_name_owner_unlocked (name_watcher, new_owner);
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else
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g_warning ("Received GetNameOwner reply with invalid owner \"%s\" for \"%s\"",
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--
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2.45.1
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