USN-3956-1: Bind vulnerability

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

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

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

References

• CVE-2018-5743

from Ubuntu Security Notices http://bit.ly/2USVHvP