Bjørn Lie
2bc9350593
- Replace avahi-0.7-python3.patch with avahi-0.7-dbm.patch: use what is upstream (boo#1110668). - Add avahi-0.7-encode-strings-as-utf8.patch: encode strings as UTF-8 (boo#1110668). - Add avahi-0.7-python3-bookmarks.patch: make bookmarks python 3 compatible (boo#1110668). - Add CVE-2018-1000845.patch: drop legacy unicast queries from address not on local link (boo#1120281 CVE-2018-1000845). - Drop avahi-0.6.31-invalid-packet.patch: fixed upstream. OBS-URL: https://build.opensuse.org/request/show/662744 OBS-URL: https://build.opensuse.org/package/show/GNOME:Factory/avahi?expand=0&rev=150
46 lines
1.5 KiB
Diff
46 lines
1.5 KiB
Diff
From e111def44a7df4624a4aa3f85fe98054bffb6b4f Mon Sep 17 00:00:00 2001
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From: Trent Lloyd <trent@lloyd.id.au>
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Date: Sat, 22 Dec 2018 09:06:07 +0800
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Subject: [PATCH] Drop legacy unicast queries from address not on local link
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When handling legacy unicast queries, ensure that the source IP is
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inside a subnet on the local link, otherwise drop the packet.
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Fixes #145
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Fixes #203
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CVE-2017-6519
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CVE-2018-100084
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---
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avahi-core/server.c | 8 ++++++++
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1 file changed, 8 insertions(+)
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diff --git a/avahi-core/server.c b/avahi-core/server.c
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index a2cb19a..a2580e3 100644
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--- a/avahi-core/server.c
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+++ b/avahi-core/server.c
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@@ -930,6 +930,7 @@ static void dispatch_packet(AvahiServer *s, AvahiDnsPacket *p, const AvahiAddres
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if (avahi_dns_packet_is_query(p)) {
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int legacy_unicast = 0;
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+ char t[AVAHI_ADDRESS_STR_MAX];
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/* For queries EDNS0 might allow ARCOUNT != 0. We ignore the
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* AR section completely here, so far. Until the day we add
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@@ -947,6 +948,13 @@ static void dispatch_packet(AvahiServer *s, AvahiDnsPacket *p, const AvahiAddres
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legacy_unicast = 1;
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}
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+ if (!is_mdns_mcast_address(dst_address) &&
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+ !avahi_interface_address_on_link(i, src_address)) {
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+
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+ avahi_log_debug("Received non-local unicast query from host %s on interface '%s.%i'.", avahi_address_snprint(t, sizeof(t), src_address), i->hardware->name, i->protocol);
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+ return;
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+ }
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+
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if (legacy_unicast)
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reflect_legacy_unicast_query_packet(s, p, i, src_address, port);
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--
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2.18.0
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