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Ubuntu Security Notice USN-1139-1

Ubuntu Security Notice USN-1139-1
Posted May 30, 2011
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1139-1 - It was discovered that Bind incorrectly handled certain bad signatures if multiple trust anchors existed for a single zone. A remote attacker could use this flaw to cause Bind to stop responding, resulting in a denial of service. This issue only affected Ubuntu 8.04 LTS and 10.04 LTS. Frank Kloeker and Michael Sinatra discovered that Bind incorrectly handled certain very large RRSIG RRsets included in negative responses. A remote attacker could use this flaw to cause Bind to stop responding, resulting in a denial of service.

tags | advisory, remote, denial of service
systems | linux, ubuntu
advisories | CVE-2010-3762, CVE-2011-1910
SHA-256 | 82a2c36b85a888540cafda385a6411a7d5d9aa9aa7f327427e24d3e0ecb19e3a

Ubuntu Security Notice USN-1139-1

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-1139-1
May 30, 2011

bind9 vulnerabilities
==========================================================================

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

- Ubuntu 11.04
- Ubuntu 10.10
- Ubuntu 10.04 LTS
- Ubuntu 8.04 LTS

Summary:

An attacker could send crafted input to Bind and cause it to crash.

Software Description:
- bind9: Internet Domain Name Server

Details:

It was discovered that Bind incorrectly handled certain bad signatures if
multiple trust anchors existed for a single zone. A remote attacker could
use this flaw to cause Bind to stop responding, resulting in a denial of
service. This issue only affected Ubuntu 8.04 LTS and 10.04 LTS.
(CVE-2010-3762)

Frank Kloeker and Michael Sinatra discovered that Bind incorrectly handled
certain very large RRSIG RRsets included in negative responses. A remote
attacker could use this flaw to cause Bind to stop responding, resulting in
a denial of service. (CVE-2011-1910)

Update instructions:

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

Ubuntu 11.04:
libdns69 1:9.7.3.dfsg-1ubuntu2.1

Ubuntu 10.10:
libdns66 1:9.7.1.dfsg.P2-2ubuntu0.3

Ubuntu 10.04 LTS:
libdns64 1:9.7.0.dfsg.P1-1ubuntu0.2

Ubuntu 8.04 LTS:
libdns36 1:9.4.2.dfsg.P2-2ubuntu0.7

In general, a standard system update will make all the necessary changes.

References:
CVE-2010-3762, CVE-2011-1910

Package Information:
https://launchpad.net/ubuntu/+source/bind9/1:9.7.3.dfsg-1ubuntu2.1
https://launchpad.net/ubuntu/+source/bind9/1:9.7.1.dfsg.P2-2ubuntu0.3
https://launchpad.net/ubuntu/+source/bind9/1:9.7.0.dfsg.P1-1ubuntu0.2
https://launchpad.net/ubuntu/+source/bind9/1:9.4.2.dfsg.P2-2ubuntu0.7


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