Debian 8: DSA-3758-1 Critical Vulnerability in Bind9 Denial of Service

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 serverscannot trigger these assertion failures. These vulnerabilities are
present whether or not DNSSEC validation is enabled in the server
configuration.

For the stable distribution (jessie), these problems have been fixed in
version 1:9.9.5.dfsg-9+deb8u9.

We recommend that you upgrade your bind9 packages.

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
foun...