ISC Releases Security Patches for New BIND DNS Software Vulnerabilities

Jan 28, 2023

Jan 28, 2023Ravie LakshmananServer Security / DNS

The Internet Systems Consortium (ISC) has released patches to
address multiple security vulnerabilities in the Berkeley Internet
Name Domain (BIND) 9 Domain Name System (DNS) software suite that
could lead to a denial-of-service (DoS) condition.

“A remote attacker could exploit these vulnerabilities to
potentially cause denial-of-service conditions and system
failures,” the U.S. Cybersecurity and Infrastructure Security
Agency (CISA) said ^[1]
in an advisory released Friday.

The open source software is used by major financial firms,
national and international carriers, internet service providers
(ISPs), retailers, manufacturers, educational institutions, and
government entities, according to its website ^[2].

All four flaws reside in named ^[3], a BIND9 service ^[4]
that functions as an authoritative nameserver for a fixed set of
DNS zones or as a recursive resolver for clients on a local
network.

The list of the bugs, which are rated 7.5 on the CVSS scoring
system, is as follows –

CVE-2022-3094^[5] – An UPDATE message
flood may cause named to exhaust all available memory
CVE-2022-3488^[6] – BIND Supported Preview
Edition named may terminate unexpectedly when processing ECS
options in repeated responses to iterative queries
CVE-2022-3736^[7] – named configured to
answer from stale cache may terminate unexpectedly while processing
RRSIG queries
CVE-2022-3924^[8] – named configured to
answer from stale cache may terminate unexpectedly at
recursive-clients soft quota

Successful exploitation of the vulnerabilities could cause the
named service to crash or exhaust available memory on a target
server.

The issues affect versions 9.16.0 to 9.16.36, 9.18.0 to 9.18.10,
9.19.0 to 9.19.8, and 9.16.8-S1 to 9.16.36-S1. CVE-2022-3488 also
impacts BIND Supported Preview Edition versions 9.11.4-S1 to
9.11.37-S1. They have been resolved in versions 9.16.37, 9.18.11,
9.19.9, and 9.16.37-S1.

Although there is no evidence that any of these vulnerabilities
are being actively exploited, users are recommended to upgrade to
the latest version as soon as possible to mitigate potential
threats.

Found this article interesting? Follow us on Twitter ^[9]
and LinkedIn ^[10] to read more exclusive
content we post.

References

^{^}
said
(www.cisa.gov)
^{^}
website
(www.isc.org)
^{^}
named
(kb.isc.org)
^{^}
BIND9
service (bind9.readthedocs.io)
^{^}
CVE-2022-3094
(kb.isc.org)
^{^}
CVE-2022-3488
(kb.isc.org)
^{^}
CVE-2022-3736
(kb.isc.org)
^{^}
CVE-2022-3924
(kb.isc.org)
^{^}
Twitter
 (twitter.com)
^{^}
LinkedIn
(www.linkedin.com)

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ISC Releases Security Patches for New BIND DNS Software Vulnerabilities

References

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