Ubuntu 23.04 USN-6183-1: Moderate Severity Bind DoS Vulnerabilities Fixed

ubuntu

June 21, 2023

Several security issues were fixed in Bind.

Summary

Several security issues were fixed in Bind.

Software Description:

- bind9: Internet Domain Name Server

Details:

Shoham Danino, Anat Bremler-Barr, Yehuda Afek, and Yuval Shavitt discovered

that Bind incorrectly handled the cache size limit. A remote attacker could

possibly use this issue to consume memory, leading to a denial of service.

(CVE-2023-2828)

It was discovered that Bind incorrectly handled the recursive-clients

quota. A remote attacker could possibly use this issue to cause Bind to

crash, resulting in a denial of service. This issue only affected Ubuntu

22.04 LTS, Ubuntu 22.10, and Ubuntu 23.04. (CVE-2023-2911)

Topics Covered

security advisory denial of service moderate threat ubuntu bind9

Update Instructions

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

Ubuntu 23.04:
   bind9                           1:9.18.12-1ubuntu1.1

Ubuntu 22.10:
   bind9                           1:9.18.12-0ubuntu0.22.10.2

Ubuntu 22.04 LTS:
   bind9                           1:9.18.12-0ubuntu0.22.04.2

Ubuntu 20.04 LTS:
   bind9                           1:9.16.1-0ubuntu2.15

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