This update for bind fixes the following issues:

CVE-2017-3137 (bsc#1033467):
Mistaken assumptions about the ordering of records in the answer
section of a response containing CNAME or DNAME resource records
could have been exploited to cause a denial of service of a bind
server performing recursion.

CVE-2017-3136 (bsc#1033466):
An attacker could have constructed a query that would cause a denial
of service of servers configured to use DNS64.

CVE-2017-3138 (bsc#1033468):
An attacker with access to the BIND control channel could have caused
the server to stop by triggering an assertion failure.

CVE-2016-6170 (bsc#987866):
Primary DNS servers could have caused a denial of service of secondary DNS servers via a large AXFR response.
IXFR servers could have caused a denial of service of IXFR clients via a large IXFR response.
Remote authenticated users could have caused a denial of service of primary DNS servers via a large UPDATE message.

CVE-2016-2775 (bsc#989528):
When lwresd or the named lwres option were enabled, bind allowed remote attackers to cause a denial of service
(daemon crash) via a long request that uses the lightweight resolver protocol.

One additional non-security bug was fixed:

The default umask was changed to 077. (bsc#1020983)

This update was imported from the SUSE:SLE-12-SP1:Update update project.