mirrors/poky
1
0
Fork 0
mirror of https://git.yoctoproject.org/poky synced 2026-04-15 21:32:13 +02:00
Code Issues Packages Projects Releases Wiki Activity

avahi: fix CVE-2017-6519

Browse Source 
Backport patch to fix CVE-2017-6519.

CVE: CVE-2017-6519

(From OE-Core rev: cf787f8eab1c85dbafb5e74bf12eb4ddb5c5cbf7)

Signed-off-by: Kai Kang <kai.kang@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: Armin Kuster <akuster808@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Kai Kang
2019-04-02 03:44:26 -04:00
committed by Richard Purdie
parent 5b80f507d2
commit 032c2e5deb
2 changed files with 51 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
meta/recipes-connectivity/avahi/avahi.inc
View File

@@ -19,7 +19,9 @@ LIC_FILES_CHKSUM = "file://LICENSE;md5=2d5025d4aa3495befef8f17206a5b0a1 \
file://avahi-daemon/main.c;endline=21;md5=9ee77368c5407af77caaef1b07285969 \
file://avahi-client/client.h;endline=23;md5=f4ac741a25c4f434039ba3e18c8674cf"
SRC_URI = "https://github.com/lathiat/avahi/releases/download/v${PV}/avahi-${PV}.tar.gz"
SRC_URI = "https://github.com/lathiat/avahi/releases/download/v${PV}/avahi-${PV}.tar.gz \
file://fix-CVE-2017-6519.patch \
"
UPSTREAM_CHECK_URI = "https://github.com/lathiat/avahi/releases/"
SRC_URI[md5sum] = "d76c59d0882ac6c256d70a2a585362a6"

48
meta/recipes-connectivity/avahi/files/fix-CVE-2017-6519.patch Normal file
View File

@@ -0,0 +1,48 @@
Upstream-Status: Backport [https://github.com/lathiat/avahi/commit/e111def]
CVE: CVE-2017-6519
Signed-off-by: Kai Kang <kai.kang@windriver.com>
From e111def44a7df4624a4aa3f85fe98054bffb6b4f Mon Sep 17 00:00:00 2001
From: Trent Lloyd <trent@lloyd.id.au>
Date: Sat, 22 Dec 2018 09:06:07 +0800
Subject: [PATCH] Drop legacy unicast queries from address not on local link
When handling legacy unicast queries, ensure that the source IP is
inside a subnet on the local link, otherwise drop the packet.
Fixes #145
Fixes #203
CVE-2017-6519
CVE-2018-1000845
---
avahi-core/server.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/avahi-core/server.c b/avahi-core/server.c
index a2cb19a8..a2580e38 100644
--- a/avahi-core/server.c
+++ b/avahi-core/server.c
@@ -930,6 +930,7 @@ static void dispatch_packet(AvahiServer *s, AvahiDnsPacket *p, const AvahiAddres
if (avahi_dns_packet_is_query(p)) {
int legacy_unicast = 0;
+ char t[AVAHI_ADDRESS_STR_MAX];
/* For queries EDNS0 might allow ARCOUNT != 0. We ignore the
* AR section completely here, so far. Until the day we add
@@ -947,6 +948,13 @@ static void dispatch_packet(AvahiServer *s, AvahiDnsPacket *p, const AvahiAddres
legacy_unicast = 1;
}
+ if (!is_mdns_mcast_address(dst_address) &&
+ !avahi_interface_address_on_link(i, src_address)) {
+
+ 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);
+ return;
+ }
+
if (legacy_unicast)
reflect_legacy_unicast_query_packet(s, p, i, src_address, port);