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[SECURITY] [DLA 3816-1] bind9 security update

Debian LTS Advisory DLA-3816-1                debian-lts@lists.debian.org
https://www.debian.org/lts/security/               Santiago Ruano Rincón
May 17, 2024                                  https://wiki.debian.org/LTS

Package        : bind9
Version        : 1:9.11.5.P4+dfsg-5.1+deb10u11
CVE ID         : CVE-2023-50387 CVE-2023-50868
Debian Bug     : 

Two vulnerabilities were discovered in BIND, a DNS server implementation, which
may result in denial of service.


    Certain DNSSEC aspects of the DNS protocol allow remote attackers to cause
    a denial of service via DNSSEC queries. This is known as the "KeyTrap"


    The Closest Encloser Proof aspect of the DNS protocol allows remote
    attackers to cause a denial of service via DNSSEC queries in a random
    subdomain attack. This is known as the "NSEC3" issue.

For Debian 10 buster, these problems have been fixed in version

We recommend that you upgrade your bind9 packages.

For the detailed security status of bind9 please refer to
its security tracker page at:

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

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