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Ubuntu Security Notice USN-3956-1

Ubuntu Security Notice USN-3956-1
Posted Apr 25, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3956-1 - It was discovered that Bind incorrectly handled limiting the number of simultaneous TCP clients. A remote attacker could possibly use this issue to cause Bind to consume resources, leading to a denial of service.

tags | advisory, remote, denial of service, tcp
systems | linux, ubuntu
advisories | CVE-2018-5743
SHA-256 | 3d24ed0e149890bba90071f8a75a8241b8ac0de8924929c8af98c07861a6b0c0

Ubuntu Security Notice USN-3956-1

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-3956-1
April 25, 2019

bind9 vulnerability
==========================================================================

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

- Ubuntu 19.04
- Ubuntu 18.10
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

Bind could be made to consume resources if it received specially crafted
network traffic.

Software Description:
- bind9: Internet Domain Name Server

Details:

It was discovered that Bind incorrectly handled limiting the number of
simultaneous TCP clients. A remote attacker could possibly use this issue
to cause Bind to consume resources, leading to a denial of service.

Update instructions:

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

Ubuntu 19.04:
bind9 1:9.11.5.P1+dfsg-1ubuntu2.3

Ubuntu 18.10:
bind9 1:9.11.4+dfsg-3ubuntu5.3

Ubuntu 18.04 LTS:
bind9 1:9.11.3+dfsg-1ubuntu1.7

Ubuntu 16.04 LTS:
bind9 1:9.10.3.dfsg.P4-8ubuntu1.14

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

References:
https://usn.ubuntu.com/usn/usn-3956-1
CVE-2018-5743

Package Information:
https://launchpad.net/ubuntu/+source/bind9/1:9.11.5.P1+dfsg-1ubuntu2.3
https://launchpad.net/ubuntu/+source/bind9/1:9.11.4+dfsg-3ubuntu5.3
https://launchpad.net/ubuntu/+source/bind9/1:9.11.3+dfsg-1ubuntu1.7
https://launchpad.net/ubuntu/+source/bind9/1:9.10.3.dfsg.P4-8ubuntu1.14
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