USN-888-1: Bind vulnerabilities

Releases

• Ubuntu 9.10
• Ubuntu 9.04
• Ubuntu 8.10
• Ubuntu 8.04
• Ubuntu 6.06

Packages

• bind9 -

Details

It was discovered that Bind would incorrectly cache bogus NXDOMAIN
responses. When DNSSEC validation is in use, a remote attacker could
exploit this to cause a denial of service, and possibly poison DNS caches.
(CVE-2010-0097)

USN-865-1 provided updated Bind packages to fix a security vulnerability.
The upstream security patch to fix CVE-2009-4022 was incomplete and
CVE-2010-0290 was assigned to the issue. This update corrects the problem.
Original advisory details:

Michael Sinatra discovered that Bind did not correctly validate certain
records added to its cache. When DNSSEC validation is in use, a remote
attacker could exploit this to spoof DNS entries and poison DNS caches.
Among other things, this could lead to misdirected email and web traffic.

Update instructions

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

Ubuntu 9.10

• libdns53 - 1:9.6.1.dfsg.P1-3ubuntu0.3

Ubuntu 9.04

• libdns46 - 1:9.5.1.dfsg.P2-1ubuntu0.4

Ubuntu 8.10

• libdns44 - 1:9.5.0.dfsg.P2-1ubuntu3.5

Ubuntu 8.04

• libdns36 - 1:9.4.2.dfsg.P2-2ubuntu0.5

Ubuntu 6.06

• libdns23 - 1:9.3.2-2ubuntu1.11

In general, a standard system upgrade is sufficient to effect the
necessary changes.

References

• CVE-2010-0097
• CVE-2010-0290
• CVE-2009-4022

Related notices

• USN-865-1: libdns44, libdns46, libdns23, bind9, libdns53, libdns36