Debian Long Term Support / LTS Security Information / 2017 / Security Information -- DLA-957-1 bind9

Debian Security Advisory

DLA-957-1 bind9 -- LTS security update

Date Reported:

28 May 2017

Affected Packages:

bind9

Vulnerable:

Yes

Security database references:

In Mitre's CVE dictionary: CVE-2017-3136, CVE-2017-3137, CVE-2017-3138.

More information:

• CVE-2017-3136

  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/article/AA-01471.

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

We recommend that you upgrade your bind9 packages.

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS