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USN-6642-1: Bind vulnerabilities

19 February 2024

Several security issues were fixed in Bind.

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Releases

Packages

  • bind9 - Internet Domain Name Server

Details

Shoham Danino, Anat Bremler-Barr, Yehuda Afek, and Yuval Shavitt discovered
that Bind incorrectly handled parsing large DNS messages. A remote attacker
could possibly use this issue to cause Bind to consume resources, leading
to a denial of service. (CVE-2023-4408)

Elias Heftrig, Haya Schulmann, Niklas Vogel, and Michael Waidner discovered
that Bind icorrectly handled validating DNSSEC messages. A remote attacker
could possibly use this issue to cause Bind to consume resources, leading
to a denial of service. (CVE-2023-50387)

It was discovered that Bind incorrectly handled preparing an NSEC3 closest
encloser proof. A remote attacker could possibly use this issue to cause
Bind to consume resources, leading to a denial of service. (CVE-2023-50868)

It was discovered that Bind incorrectly handled reverse zone queries when
nxdomain-redirect is enabled. A remote attacker could possibly use this
issue to cause Bind to crash, leading to a denial of service.
(CVE-2023-5517)

It was discovered that Bind incorrectly handled certain specific recursive
query patterns. A remote attacker could possibly use this issue to cause
Bind to consume memory, leading to a denial of service. (CVE-2023-6516)

Bind has been updated to 9.6.48. In addition to security fixes, the updated
packages contain bug fixes, new features, and possibly incompatible
changes.

Please see the following for more information:
https://downloads.isc.org/isc/bind9/9.16.48/doc/arm/html/notes.html

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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 20.04

This update uses a new upstream release, which includes additional bug
fixes. In general, a standard system update will make all the necessary
changes.

References

Related notices

  • USN-6633-1: bind9-utils, bind9-libs, dnsutils, bind9-doc, bind9-host, bind9utils, bind9-dev, bind9, bind9-dnsutils
  • USN-6657-1: dnsmasq-base, dnsmasq-utils, dnsmasq, dnsmasq-base-lua
  • USN-6665-1: python3-unbound, unbound-host, libunbound-dev, unbound-anchor, unbound, libunbound8, python-unbound
  • USN-6723-1: libisc95, lwresd, libbind9-160, liblwres160, libbind9-90, libdns162, libisccc160, libisccfg140, libisc-export160, libdns-export1100, libbind9-140, liblwres141, dnsutils, libdns-export162, libisccfg160, libirs-export160, libisccfg90, libirs160, libisc169, libdns100, libirs141, libisccc-export160, libisccfg-export140, bind9-doc, bind9-host, libirs-export141, libisccc-export140-udeb, host, bind9utils, libisccc-export140, libisc160, liblwres90, libisccfg-export160, libisc-export169, libbind-export-dev, libbind-dev, libisccc140, libisccc90, libdns1100, bind9
  • USN-6657-2: dnsmasq-base, dnsmasq-utils, dnsmasq, dnsmasq-base-lua

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Further reading