1. Ubuntu Security Notices
  2. USN-6723-1

USN-6723-1: Bind vulnerabilities

Publication date

9 April 2024

Overview

Bind could be made to crash if it received specially crafted input.

Releases

Packages

  • bind9 - Internet Domain Name Server

Details

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)

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)

Update instructions

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
18.04 bionic bind9 –  1:9.11.3+dfsg-1ubuntu1.19+esm3  
16.04 xenial bind9 –  1:9.10.3.dfsg.P4-8ubuntu1.19+esm8  
14.04 trusty bind9 –  1:9.9.5.dfsg-3ubuntu0.19+esm12  

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References

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