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USN-6183-2: Bind vulnerability

18 July 2023

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

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Releases

Packages

  • bind9 - Internet Domain Name Server

Details

USN-6183-1 fixed vulnerabilities in Bind. This update provides the
corresponding updates for Ubuntu 14.04 LTS, Ubuntu 16.04 LTS and Ubuntu 18.04
LTS.

Original advisory 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)

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

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Update instructions

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

Ubuntu 18.04
Ubuntu 16.04
Ubuntu 14.04

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

References

Related notices

  • USN-6183-1: bind9-utils, bind9, bind9-dnsutils, bind9-libs, bind9-host, bind9utils, bind9-dev, dnsutils, bind9-doc