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Ubuntu 23.04 LTS USN-6390-1 Critical: Bind Denial Of Service

ubuntu
Calendar Grey September 20, 2023
Dist Ubuntu Esm H88
Important patch released for Ubuntu's Bind service to address vulnerabilities causing potential system instability from specially crafted network packets.
Bind could be made to crash if it received specially crafted network traffic.

Summary

Bind could be made to crash if it received specially crafted network

traffic.

Software Description:

- bind9: Internet Domain Name Server

Details:

It was discovered that Bind incorrectly handled certain control channel

messages. A remote attacker with access to the control channel could

possibly use this issue to cause Bind to crash, resulting in a denial of

service. (CVE-2023-3341)

Robert Story discovered that Bind incorrectly handled certain DNS-over-TLS

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 23.04. (CVE-2023-4236)

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu network issues Bind

Update Instructions

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

Ubuntu 23.04:
   bind9                           1:9.18.12-1ubuntu1.2

Ubuntu 22.04 LTS:
   bind9                           1:9.18.12-0ubuntu0.22.04.3

Ubuntu 20.04 LTS:
   bind9                           1:9.16.1-0ubuntu2.16

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

References

https://ubuntu.com/security/notices/USN-6390-1

CVE-2023-3341, CVE-2023-4236

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-6390-1

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu network issues Bind

Package Information

https://launchpad.net/ubuntu/+source/bind9/1:9.18.12-1ubuntu1.2
https://launchpad.net/ubuntu/+source/bind9/1:9.18.12-0ubuntu0.22.04.3
https://launchpad.net/ubuntu/+source/bind9/1:9.16.1-0ubuntu2.16

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