[SECURITY] [DLA 957-1] bind9 security update
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Package : bind9
Version : 1:9.8.4.dfsg.P1-6+nmu2+deb7u16
CVE ID : CVE-2017-3136 CVE-2017-3137 CVE-2017-3138
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
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