A bind9 security update has been released for Debian GNU/Linux 10 LTS to address an issue that results in potential denial of service.

[SECURITY] [DLA 3498-1] bind9 security update

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Debian LTS Advisory DLA-3498-1 debian-lts@lists.debian.org
https://www.debian.org/lts/security/ Chris Lamb
July 18, 2023 https://wiki.debian.org/LTS
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Package : bind9
Version : 1:9.11.5.P4+dfsg-5.1+deb10u9
CVE ID : CVE-2023-2828

It was discovered that there was a potential denial of service (DoS)
in bind9, the popular Domain Name Server (DNS) server.

Shoham Danino, Anat Bremler-Barr, Yehuda Afek and Yuval Shavitt
discovered that a flaw in the cache-cleaning algorithm used in named
can cause that named's configured cache size limit can be
significantly exceeded, potentially resulting in a denial of service
attack.

For Debian 10 buster, this problem has been fixed in version
1:9.11.5.P4+dfsg-5.1+deb10u9.

We recommend that you upgrade your bind9 packages.

For the detailed security status of bind9 please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/bind9

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS