Debian Security Advisory
DLA-957-1 bind9 -- LTS security update
- Date Reported:
- 28 May 2017
- Affected Packages:
- Security database references:
- In Mitre's CVE dictionary: CVE-2017-3136, CVE-2017-3137, CVE-2017-3138.
- More information:
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.
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.
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