Avahi: Fix CVE-2023-1981, add %check section (#10881)

Author: dmcilvaney

SPECS/avahi/CVE-2023-1981.patch

@@ -0,0 +1,53 @@
+From a2696da2f2c50ac43b6c4903f72290d5c3fa9f6f Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Petr=20Men=C5=A1=C3=ADk?= <[email protected]>
+Date: Thu, 17 Nov 2022 01:51:53 +0100
+Subject: [PATCH] Emit error if requested service is not found
+
+It currently just crashes instead of replying with error. Check return
+value and emit error instead of passing NULL pointer to reply.
+
+Fixes #375
+---
+ avahi-daemon/dbus-protocol.c | 20 ++++++++++++++------
+ 1 file changed, 14 insertions(+), 6 deletions(-)
+
+diff --git a/avahi-daemon/dbus-protocol.c b/avahi-daemon/dbus-protocol.c
+index 70d7687b..406d0b44 100644
+--- a/avahi-daemon/dbus-protocol.c
++++ b/avahi-daemon/dbus-protocol.c
+@@ -375,10 +375,14 @@ static DBusHandlerResult dbus_get_alternative_host_name(DBusConnection *c, DBusM
+     }
+ 
+     t = avahi_alternative_host_name(n);
+-    avahi_dbus_respond_string(c, m, t);
+-    avahi_free(t);
++    if (t) {
++        avahi_dbus_respond_string(c, m, t);
++        avahi_free(t);
+ 
+-    return DBUS_HANDLER_RESULT_HANDLED;
++        return DBUS_HANDLER_RESULT_HANDLED;
++    } else {
++        return avahi_dbus_respond_error(c, m, AVAHI_ERR_NOT_FOUND, "Hostname not found");
++    }
+ }
+ 
+ static DBusHandlerResult dbus_get_alternative_service_name(DBusConnection *c, DBusMessage *m, DBusError *error) {
+@@ -389,10 +393,14 @@ static DBusHandlerResult dbus_get_alternative_service_name(DBusConnection *c, DB
+     }
+ 
+     t = avahi_alternative_service_name(n);
+-    avahi_dbus_respond_string(c, m, t);
+-    avahi_free(t);
++    if (t) {
++        avahi_dbus_respond_string(c, m, t);
++        avahi_free(t);
+ 
+-    return DBUS_HANDLER_RESULT_HANDLED;
++        return DBUS_HANDLER_RESULT_HANDLED;
++    } else {
++        return avahi_dbus_respond_error(c, m, AVAHI_ERR_NOT_FOUND, "Service not found");
++    }
+ }
+ 
+ static DBusHandlerResult dbus_create_new_entry_group(DBusConnection *c, DBusMessage *m, DBusError *error) {

SPECS/avahi/avahi.spec

@@ -3,7 +3,7 @@
 Summary:        Local network service discovery
 Name:           avahi
 Version:        0.8
-Release:        1%{?dist}
+Release:        2%{?dist}
 License:        LGPLv2+
 Vendor:         Microsoft Corporation
 Distribution:   Mariner
@@ -12,6 +12,7 @@ Source0:        https://github.com/lathiat/avahi/releases/download/v%{version}/%
 Patch0:         %{name}-libevent-pc-fix.patch
 Patch1:         CVE-2021-3468.patch
 Patch2:         CVE-2021-3502.patch
+Patch3:         CVE-2023-1981.patch
 BuildRequires:  automake
 BuildRequires:  dbus-devel >= 0.90
 BuildRequires:  dbus-glib-devel >= 0.70
@@ -405,6 +406,9 @@ exit 0
 %endif
 
 %changelog
+* Tue Oct 29 2024 Daniel McIlvaney <[email protected]> - 0.8-2
+- Fix CVE-2023-1981 with an upstream patch
+
 * Wed Apr 20 2022 Olivia Crain <[email protected]> - 0.8-1
 - Upgrade to latest upstream version to fix CVE-2017-6519
 - Add upstream patch to fix CVE-2021-3502