USN-3893-1: Bind vulnerabilities

22 February 2019

bind9 vulnerabilities

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

  • Ubuntu 18.10
  • Ubuntu 18.04 LTS
  • Ubuntu 16.04 LTS
  • Ubuntu 14.04 LTS

Summary

Several security issues were fixed in Bind.

Software Description

  • bind9 - Internet Domain Name Server

Details

Toshifumi Sakaguchi discovered that Bind incorrectly handled memory. A remote attacker could possibly use this issue to cause Bind to consume resources, leading to a denial of service. This issue only affected Ubuntu 18.04 LTS and Ubuntu 18.10. (CVE-2018-5744)

It was discovered that Bind incorrectly handled certain trust anchors when used with the "managed-keys" feature. A remote attacker could possibly use this issue to cause Bind to crash, resulting in a denial of service. (CVE-2018-5745)

It was discovered that Bind incorrectly handled certain controls for zone transfers, contrary to expectations. (CVE-2019-6465)

Update instructions

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

Ubuntu 18.10
bind9 - 1:9.11.4+dfsg-3ubuntu5.1
Ubuntu 18.04 LTS
bind9 - 1:9.11.3+dfsg-1ubuntu1.5
Ubuntu 16.04 LTS
bind9 - 1:9.10.3.dfsg.P4-8ubuntu1.12
Ubuntu 14.04 LTS
bind9 - 1:9.9.5.dfsg-3ubuntu0.19

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