USN-6183-1: Bind vulnerabilities

Releases

• Ubuntu 23.04
• Ubuntu 22.10
• Ubuntu 22.04 LTS
• Ubuntu 20.04 LTS

Packages

• bind9 - Internet Domain Name Server

Details

Shoham Danino, Anat Bremler-Barr, Yehuda Afek, and Yuval Shavitt discovered
that Bind incorrectly handled the cache size limit. A remote attacker could
possibly use this issue to consume memory, leading to a denial of service.
(CVE-2023-2828)

It was discovered that Bind incorrectly handled the recursive-clients
quota. A remote attacker could possibly use this issue to cause Bind to
crash, resulting in a denial of service. This issue only affected Ubuntu
22.04 LTS, Ubuntu 22.10, and Ubuntu 23.04. (CVE-2023-2911)

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 23.04

• bind9 - 1:9.18.12-1ubuntu1.1

Ubuntu 22.10

• bind9 - 1:9.18.12-0ubuntu0.22.10.2

Ubuntu 22.04

• bind9 - 1:9.18.12-0ubuntu0.22.04.2

Ubuntu 20.04

• bind9 - 1:9.16.1-0ubuntu2.15

In general, a standard system update will make all the necessary changes.

References

• CVE-2023-2911
• CVE-2023-2828

Related notices

• USN-6183-2: bind9-host, libdns-export1100, host, bind9-doc, libisccc-export160, libdns162, libbind-export-dev, libbind9-160, libdns1100, libirs-export141, liblwres160, libisc-export160, libisc160, libisccc140, libisccc-export140-udeb, libisccc90, bind9, libisccfg160, libisccfg-export140, libirs-export160, libisccfg140, libisccc160, bind9utils, libbind9-140, libisccc-export140, libbind9-90, libisc169, libisc-export169, dnsutils, libirs141, libdns100, libisc95, lwresd, libisccfg90, liblwres141, libdns-export162, libbind-dev, libirs160, libisccfg-export160, liblwres90