Debian Security Advisory DSA-5439-1: Critical Fixes for Bind9 DoS Issues

CVE-2023-2828

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 denial of service.

CVE-2023-2911

It was discovered that a flaw in the handling of recursive-clients
quota may result in denial of service (named daemon crash).

For the oldstable distribution (bullseye), these problems have been fixed
in version 1:9.16.42-1~deb11u1.

For the stable distribution (bookworm), these problems have been fixed in
version 1:9.18.16-1~deb12u1.

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/source-package/bind9

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.o...