=========================================================================Ubuntu Security Notice USN-3346-3
November 08, 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
After a standard system update you need to restart Bind to make
all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-3346-3
https://ubuntu.com/security/notices/USN-3346-1
CVE-2017-3142, CVE-2017-3143
