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Ubuntu Security Notice USN-3346-2

Ubuntu Security Notice USN-3346-2
Posted Sep 18, 2017
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3346-2 - USN-3346-1 fixed vulnerabilities in Bind. The fix for CVE-2017-3142 introduced a regression in the ability to receive an AXFR or IXFR in the case where TSIG is used and not every message is signed. This update fixes the problem. In addition, this update adds the new root zone key signing key. Various other issues were also addressed.

tags | advisory, root, vulnerability
systems | linux, ubuntu
advisories | CVE-2017-3142, CVE-2017-3143
MD5 | 6f82feb480bd6612b9d8ced44919b34e

Ubuntu Security Notice USN-3346-2

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-3346-2
September 18, 2017

bind9 regression
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 17.04
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS

Summary:

USN-3346-1 introduced a regression in Bind.

Software Description:
- bind9: Internet Domain Name Server

Details:

USN-3346-1 fixed vulnerabilities in Bind. The fix for CVE-2017-3142
introduced a regression in the ability to receive an AXFR or IXFR in the
case where TSIG is used and not every message is signed. This update fixes
the problem.

In addition, this update adds the new root zone key signing key (KSK).

Original advisory details:

ClA(c)ment Berthaux discovered that Bind did not correctly check TSIG
authentication for zone update requests. An attacker could use this
to improperly perform zone updates. (CVE-2017-3143)
ClA(c)ment Berthaux discovered that Bind did not correctly check TSIG
authentication for zone transfer requests. An attacker could use this
to improperly transfer entire zones. (CVE-2017-3142)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 17.04:
bind9 1:9.10.3.dfsg.P4-10.1ubuntu5.2

Ubuntu 16.04 LTS:
bind9 1:9.10.3.dfsg.P4-8ubuntu1.8

Ubuntu 14.04 LTS:
bind9 1:9.9.5.dfsg-3ubuntu0.16

After a standard system update you need to restart Bind to make
all the necessary changes.

References:
https://www.ubuntu.com/usn/usn-3346-2
https://www.ubuntu.com/usn/usn-3346-1
https://launchpad.net/bugs/1717981

Package Information:
https://launchpad.net/ubuntu/+source/bind9/1:9.10.3.dfsg.P4-10.1ubuntu5.2
https://launchpad.net/ubuntu/+source/bind9/1:9.10.3.dfsg.P4-8ubuntu1.8
https://launchpad.net/ubuntu/+source/bind9/1:9.9.5.dfsg-3ubuntu0.16


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