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Ubuntu 16.04 ESM USN-5126-2 Critical: Bind9 Denial of Service

ubuntu
Calendar Grey October 28, 2021
Dist Ubuntu Esm H88
Ubuntu Security Notice USN-5127-1 highlights a vulnerability in the apache2 package that could result in unauthorized access to sensitive data.
Bind could be made to consume resources if it received specially crafted network traffic.

Summary

Bind could be made to consume resources if it received specially crafted

network traffic.

Software Description:

- bind9: Internet Domain Name Server

Details:

USN-5126-1 fixed a vulnerability in Bind. This update provides

the corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM.

Original advisory details:

Kishore Kumar Kothapalli discovered that Bind incorrectly handled the lame

cache when processing responses. A remote attacker could possibly use this

issue to cause Bind to consume resources, resulting in a denial of service.

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu bind9 resource consumption

Update Instructions

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

Ubuntu 16.04 ESM:
  bind9                           1:9.10.3.dfsg.P4-8ubuntu1.19+esm1

Ubuntu 14.04 ESM:
  bind9                           1:9.9.5.dfsg-3ubuntu0.19+esm5

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

References

https://ubuntu.com/security/notices/USN-5126-2

https://ubuntu.com/security/notices/USN-5126-1

CVE-2021-25219

Severity
critical
Lowest
Low
Medium
High
Critical

October 28, 2021

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu bind9 resource consumption

Package Information

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