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Ubuntu 19.04, USN-4026-1 Critical: Bind Denial Of Service Issue

ubuntu
Calendar Grey June 20, 2019
Dist Ubuntu Esm H88
Update USN-4026-1 addresses critical binds9 issues that may lead to denial of service on impacted Ubuntu systems.
Bind could be made to crash if it received specially crafted network traffic.

Summary

Bind could be made to crash if it received specially crafted network

traffic.

Software Description:

- bind9: Internet Domain Name Server

Details:

It was discovered that Bind incorrectly handled certain malformed packets.

A remote attacker could possibly use this issue to cause Bind to crash,

resulting in a denial of service.

Topics%20covered

Topics Covered

security advisory doS ubuntu bind9 network issue

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-1ubuntu2.5

Ubuntu 18.10:
  bind9                           1:9.11.4+dfsg-3ubuntu5.4

Ubuntu 18.04 LTS:
  bind9                           1:9.11.3+dfsg-1ubuntu1.8

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

References

https://ubuntu.com/security/notices/USN-4026-1

CVE-2019-6471

Severity
critical
Lowest
Low
Medium
High
Critical

June 20, 2019

Topics%20covered

Topics Covered

security advisory doS ubuntu bind9 network issue

Package Information

https://launchpad.net/ubuntu/+source/bind9/1:9.11.5.P1+dfsg-1ubuntu2.5
https://launchpad.net/ubuntu/+source/bind9/1:9.11.4+dfsg-3ubuntu5.4
https://launchpad.net/ubuntu/+source/bind9/1:9.11.3+dfsg-1ubuntu1.8

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