[AutoPR- Security] Patch avahi for CVE-2025-68471, CVE-2025-68276, CVE-2025-68468 [MEDIUM] (#15502)

Co-authored-by: Kanishk Bansal <103916909+Kanishk-Bansal@users.noreply.github.com>

Author: azurelinux-security

SPECS/avahi/CVE-2025-68276.patch

@@ -0,0 +1,65 @@
+From 9aa21a5ba089c46301a1c489f9643a5900e2e4cb Mon Sep 17 00:00:00 2001
+From: Evgeny Vereshchagin <evvers@ya.ru>
+Date: Wed, 17 Dec 2025 08:11:23 +0000
+Subject: [PATCH] core: refuse to create wide-area record browsers when
+ wide-area is off
+
+It fixes a bug where it was possible for unprivileged local users to
+crash avahi-daemon (with wide-area disabled) by creating record browsers
+with the AVAHI_LOOKUP_USE_WIDE_AREA flag set via D-Bus (either by calling
+the RecordBrowserNew method directly or by creating hostname/address/service
+resolvers/browsers that create those browsers internally themselves).
+
+```
+$ gdbus call --system --dest org.freedesktop.Avahi --object-path / --method org.freedesktop.Avahi.Server.ResolveHostName -- -1 -1 yo.local -1 1
+Error: GDBus.Error:org.freedesktop.DBus.Error.NoReply: Message recipient disconnected from message bus without replying
+```
+```
+dbus-protocol.c: interface=org.freedesktop.Avahi.Server, path=/, member=ResolveHostName
+avahi-daemon: wide-area.c:725: avahi_wide_area_scan_cache: Assertion `e' failed.
+==307948==
+==307948== Process terminating with default action of signal 6 (SIGABRT)
+==307948==    at 0x4B3630C: __pthread_kill_implementation (pthread_kill.c:44)
+==307948==    by 0x4ADF921: raise (raise.c:26)
+==307948==    by 0x4AC74AB: abort (abort.c:77)
+==307948==    by 0x4AC741F: __assert_fail_base.cold (assert.c:118)
+==307948==    by 0x48D8B85: avahi_wide_area_scan_cache (wide-area.c:725)
+==307948==    by 0x48C8953: lookup_scan_cache (browse.c:351)
+==307948==    by 0x48C8B1B: lookup_go (browse.c:386)
+==307948==    by 0x48C9148: defer_callback (browse.c:516)
+==307948==    by 0x48AEA0E: expiration_event (timeeventq.c:94)
+==307948==    by 0x489D3AE: timeout_callback (simple-watch.c:447)
+==307948==    by 0x489D787: avahi_simple_poll_dispatch (simple-watch.c:563)
+==307948==    by 0x489D91E: avahi_simple_poll_iterate (simple-watch.c:605)
+==307948==
+```
+
+wide-area has been disabled by default since
+9c4214146738146e454f098264690e8e884c39bd (v0.9-rc2).
+
+https: //github.com/avahi/avahi/security/advisories/GHSA-mhf3-865v-g5rc
+Signed-off-by: Azure Linux Security Servicing Account <azurelinux-security@microsoft.com>
+Upstream-reference: https://github.com/avahi/avahi/commit/0c013e2e819be3bda74cecf48b5f64956cf8a760.patch
+---
+ avahi-core/browse.c | 5 +++++
+ 1 file changed, 5 insertions(+)
+
+diff --git a/avahi-core/browse.c b/avahi-core/browse.c
+index 1cf0ee3..57435fc 100644
+--- a/avahi-core/browse.c
++++ b/avahi-core/browse.c
+@@ -543,6 +543,11 @@ AvahiSRecordBrowser *avahi_s_record_browser_prepare(
+     AVAHI_CHECK_VALIDITY_RETURN_NULL(server, AVAHI_FLAGS_VALID(flags, AVAHI_LOOKUP_USE_WIDE_AREA|AVAHI_LOOKUP_USE_MULTICAST), AVAHI_ERR_INVALID_FLAGS);
+     AVAHI_CHECK_VALIDITY_RETURN_NULL(server, !(flags & AVAHI_LOOKUP_USE_WIDE_AREA) || !(flags & AVAHI_LOOKUP_USE_MULTICAST), AVAHI_ERR_INVALID_FLAGS);
+ 
++    if ((flags & AVAHI_LOOKUP_USE_WIDE_AREA) && !server->wide_area_lookup_engine) {
++        avahi_server_set_errno(server, AVAHI_ERR_NOT_SUPPORTED);
++        return NULL;
++    }
++
+     if (!(b = avahi_new(AvahiSRecordBrowser, 1))) {
+         avahi_server_set_errno(server, AVAHI_ERR_NO_MEMORY);
+         return NULL;
+-- 
+2.45.4
+

SPECS/avahi/CVE-2025-68468.patch

@@ -0,0 +1,28 @@
+From 2aad32193f8b4391309498c884d6f906eb962c01 Mon Sep 17 00:00:00 2001
+From: Hugo Muis <198191869+friendlyhugo@users.noreply.github.com>
+Date: Sun, 2 Mar 2025 18:06:24 +0100
+Subject: [PATCH] core: fix DoS bug by removing incorrect assertion
+
+Closes https://github.com/avahi/avahi/issues/683
+
+Signed-off-by: Azure Linux Security Servicing Account <azurelinux-security@microsoft.com>
+Upstream-reference: https://github.com/avahi/avahi/commit/f66be13d7f31a3ef806d226bf8b67240179d309a.patch
+---
+ avahi-core/browse.c | 1 -
+ 1 file changed, 1 deletion(-)
+
+diff --git a/avahi-core/browse.c b/avahi-core/browse.c
+index e8a915e..2966f95 100644
+--- a/avahi-core/browse.c
++++ b/avahi-core/browse.c
+@@ -295,7 +295,6 @@ static void lookup_multicast_callback(
+                 lookup_drop_cname(l, interface, protocol, 0, r);
+             else {
+                 /* It's a normal record, so let's call the user callback */
+-                assert(avahi_key_equal(b->key, l->key));
+ 
+                 b->callback(b, interface, protocol, event, r, flags, b->userdata);
+             }
+-- 
+2.45.4
+

SPECS/avahi/CVE-2025-68471.patch

@@ -0,0 +1,32 @@
+From 3c1445d537218a0678927dfbca54178b13062080 Mon Sep 17 00:00:00 2001
+From: Hugo Muis <198191869+friendlyhugo@users.noreply.github.com>
+Date: Sun, 2 Mar 2025 18:06:24 +0100
+Subject: [PATCH] core: fix DoS bug by changing assert to return
+
+Closes https://github.com/avahi/avahi/issues/678
+
+Signed-off-by: Azure Linux Security Servicing Account <azurelinux-security@microsoft.com>
+Upstream-reference: https://github.com/avahi/avahi/pull/682/commits/9c6eb53bf2e290aed84b1f207e3ce35c54cc0aa1.patch
+---
+ avahi-core/browse.c | 5 ++++-
+ 1 file changed, 4 insertions(+), 1 deletion(-)
+
+diff --git a/avahi-core/browse.c b/avahi-core/browse.c
+index 2966f95..1cf0ee3 100644
+--- a/avahi-core/browse.c
++++ b/avahi-core/browse.c
+@@ -319,7 +319,10 @@ static int lookup_start(AvahiSRBLookup *l) {
+     assert(l);
+ 
+     assert(!(l->flags & AVAHI_LOOKUP_USE_WIDE_AREA) != !(l->flags & AVAHI_LOOKUP_USE_MULTICAST));
+-    assert(!l->wide_area && !l->multicast);
++    if (l->wide_area || l->multicast) {
++        /* Avoid starting a duplicate lookup */
++        return 0;
++    }
+ 
+     if (l->flags & AVAHI_LOOKUP_USE_WIDE_AREA) {
+ 
+-- 
+2.45.4
+

SPECS/avahi/avahi.spec

@@ -3,7 +3,7 @@
 Summary:        Local network service discovery
 Name:           avahi
 Version:        0.8
-Release:        5%{?dist}
+Release:        6%{?dist}
 License:        LGPLv2+
 Vendor:         Microsoft Corporation
 Distribution:   Azure Linux
@@ -19,6 +19,9 @@ Patch6:         CVE-2023-38473.patch
 Patch7:         CVE-2023-38470.patch
 Patch8:         CVE-2023-38471.patch
 Patch9:         CVE-2024-52616.patch
+Patch10:        CVE-2025-68276.patch
+Patch11:        CVE-2025-68468.patch
+Patch12:        CVE-2025-68471.patch
 BuildRequires:  automake
 BuildRequires:  dbus-devel >= 0.90
 BuildRequires:  dbus-glib-devel >= 0.70
@@ -426,7 +429,10 @@ exit 0
 %endif
 
 %changelog
-* Thu Feb 13 2024 Kanishk Bansal <kanbansal@microsoft.com> - 0.8-5
+* Wed Jan 14 2026 Azure Linux Security Servicing Account <azurelinux-security@microsoft.com> - 0.8-6
+- Patch for CVE-2025-68471, CVE-2025-68276, CVE-2025-68468
+
+* Thu Feb 13 2025 Kanishk Bansal <kanbansal@microsoft.com> - 0.8-5
 - Fix CVE-2024-52616 with an upstream patch
 
 * Mon Dec 02 2024 Kanishk Bansal <kanbansal@microsoft.com> - 0.8-4