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Ubuntu 18.04 LTS Security: USN-6723-1 Denial Of Service In Bind9

ubuntu
Calendar Grey April 9, 2024
Dist Ubuntu Esm H88
Ubuntu 6734-2 reveals flaws in apache2 causing potential service interruptions; essential patches released for enhanced safety.
Bind could be made to crash if it received specially crafted input.

Summary

Bind could be made to crash if it received specially crafted

input.

Software Description:

- 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)

Topics%20covered

Topics Covered

security advisory denial of service security issue update information ubuntu bind9 resource exhaustion

Update Instructions

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

Ubuntu 18.04 LTS (Available with Ubuntu Pro):
   bind9                           1:9.11.3+dfsg-1ubuntu1.19+esm3

Ubuntu 16.04 LTS (Available with Ubuntu Pro):
   bind9                           1:9.10.3.dfsg.P4-8ubuntu1.19+esm8

Ubuntu 14.04 LTS (Available with Ubuntu Pro):
   bind9                           1:9.9.5.dfsg-3ubuntu0.19+esm12

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

References

https://ubuntu.com/security/notices/USN-6723-1

CVE-2023-50387, CVE-2023-50868

Severity
important
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-6723-1

Topics%20covered

Topics Covered

security advisory denial of service security issue update information ubuntu bind9 resource exhaustion

Package Information

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