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             AUSCERT External Security Bulletin Redistribution

                     USN-5827-1: Bind vulnerabilities
                              27 January 2023


        AusCERT Security Bulletin Summary

Product:           Bind
Publisher:         Ubuntu
Operating System:  Ubuntu
Resolution:        Patch/Upgrade
CVE Names:         CVE-2022-3924 CVE-2022-3736 CVE-2022-3094

Original Bulletin: 

Comment: CVSS (Max):  7.5 CVE-2022-3924 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
         CVSS Source: Red Hat
         Calculator:  https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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USN-5827-1: Bind vulnerabilities

25 January 2023

Several security issues were fixed in Bind.


  o Ubuntu 22.10
  o Ubuntu 22.04 LTS
  o Ubuntu 20.04 LTS


  o bind9 - Internet Domain Name Server


Rob Schulhof discovered that Bind incorrectly handled a large number of
UPDATE messages. A remote attacker could possibly use this issue to cause
Bind to consume resources, resulting in a denial of service.
( CVE-2022-3094 )

Borja Marcos discovered that Bind incorrectly handled certain RRSIG
queries. 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 and Ubuntu 22.10. ( CVE-2022-3736 )

Maksym Odinintsev discovered that Bind incorrectly handled certain answers
from stale cache. 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 and Ubuntu 22.10. ( CVE-2022-3924 )

Update instructions

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

Ubuntu 22.10

  o bind9 - 1:9.18.4-2ubuntu2.1

Ubuntu 22.04

  o bind9 - 1:9.18.1-1ubuntu1.3

Ubuntu 20.04

  o bind9 - 1:9.16.1-0ubuntu2.12

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


  o CVE-2022-3094
  o CVE-2022-3924
  o CVE-2022-3736

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