Debian 7: DLA-957-1 Critical: bind9 Denial of Service Alerts

Oleg Gorokhov of Yandex discovered that BIND does not properly
handle certain queries when using DNS64 with the "break-dnssec yes;"
option, allowing a remote attacker to cause a denial-of-service.

CVE-2017-3137

It was discovered that BIND makes incorrect assumptions about the
ordering of records in the answer section of a response containing
CNAME or DNAME resource records, leading to situations where BIND
exits with an assertion failure. An attacker can take advantage of
this condition to cause a denial-of-service.

CVE-2017-3138

Mike Lalumiere of Dyn, Inc. discovered that BIND can exit with a
REQUIRE assertion failure if it receives a null command string on
its control channel. Note that the fix applied in Debian is only
applied as a hardening measure. Details about the issue can be found
at https://kb.isc.org/docs/aa-01471 .


For Debian 7 "Wheezy", these problems have been fixed in version
1:9.8.4.dfsg.P1-6+nmu2+deb7u16.