USN-3346-3: Bind vulnerabilities

8 November 2017

bind9 vulnerabilities

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

  • Ubuntu 12.04 ESM

Summary

Bind could be made to serve incorrect information or expose sensitive information over the network.

Software Description

  • bind9 - Internet Domain Name Server

Details

USN-3346-1 and USN-3346-2 fixed two vulnerabilities in Bind and a regression, respectively. This update provides the corresponding update for Ubuntu 12.04 ESM.

Original advisory details:

Clément 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)

Clément 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)

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

Update instructions

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

Ubuntu 12.04 ESM
bind9 - 1:9.8.1.dfsg.P1-4ubuntu0.23

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References