[OE-core] cups: whitelist CVE-2018-6553

["Steve Sakoman" <steve@sakoman.com>]

This an Ububtu specific issue:

The CUPS AppArmor profile incorrectly confined the dnssd backend
due to use of hard links. A local attacker could possibly use this
issue to escape confinement. This flaw affects versions prior to
2.2.7-1ubuntu2.1 in Ubuntu 18.04 LTS, prior to 2.2.4-7ubuntu3.1
in Ubuntu 17.10, prior to 2.1.3-4ubuntu0.5 in Ubuntu 16.04 LTS,
 and prior to 1.7.2-0ubuntu1.10 in Ubuntu 14.04 LTS

Signed-off-by: Steve Sakoman <steve@sakoman.com>
---
 meta/recipes-extended/cups/cups.inc | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/meta/recipes-extended/cups/cups.inc b/meta/recipes-extended/cups/cups.inc
index 87870e4aba..df8d4d284a 100644
--- a/meta/recipes-extended/cups/cups.inc
+++ b/meta/recipes-extended/cups/cups.inc
@@ -20,6 +20,9 @@ SRC_URI = "https://github.com/apple/cups/releases/download/v${PV}/${BP}-source.t
 UPSTREAM_CHECK_URI = "https://github.com/apple/cups/releases"
 UPSTREAM_CHECK_REGEX = "cups-(?P<pver>\d+\.\d+(\.\d+)?)-source.tar"
 
+# This is an Ubuntu only issue.
+CVE_CHECK_WHITELIST += "CVE-2018-6553"
+
 LEAD_SONAME = "libcupsdriver.so"
 
 CLEANBROKEN = "1"
-- 
2.17.1