Debian Security Advisory

DLA-805-1 bind9 -- LTS security update

Date Reported:
29 Jan 2017
Affected Packages:
Security database references:
In Mitre's CVE dictionary: CVE-2016-9131, CVE-2016-9147, CVE-2016-9444.
More information:

Several denial-of-service vulnerabilities (assertion failures) were discovered in BIND, a DNS server implementation.

  • CVE-2016-9131

    A crafted upstream response to an ANY query could cause an assertion failure.

  • CVE-2016-9147

    A crafted upstream response with self-contradicting DNSSEC data could cause an assertion failure.

  • CVE-2016-9444

    Specially-crafted upstream responses with a DS record could cause an assertion failure.

These vulnerabilities predominantly affect DNS servers providing recursive service. Client queries to authoritative-only servers cannot trigger these assertion failures. These vulnerabilities are present whether or not DNSSEC validation is enabled in the server configuration.

For Debian 7 Wheezy, these problems have been fixed in version 1:9.8.4.dfsg.P1-6+nmu2+deb7u14.

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: