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Ubuntu 14.04 ESM: USN-4468-2 Critical: Bind9 Denial Of Service

ubuntu
Calendar Grey August 24, 2020
Dist Ubuntu Esm H88
Ensure your Ubuntu systems are updated to fix a critical bind9 vulnerability that can cause system crashes from specially crafted requests.
Bind could be made to crash if it received a specially crafted request.

Summary

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

request.

Software Description:

- bind9: Internet Domain Name Server

Details:

USN-4468-1 fixed a vulnerability in Bind. This update provides

the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM.

Original advisory details:

Dave Feldman, Jeff Warren, and Joel Cunningham discovered that Bind

incorrectly handled certain truncated responses to a TSIG-signed request. A

remote attacker could possibly use this issue to cause Bind to crash,

resulting in a denial of service. (CVE-2020-8622)

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu bind9 crash

Update Instructions

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

Ubuntu 14.04 ESM:
  bind9                           1:9.9.5.dfsg-3ubuntu0.19+esm3

Ubuntu 12.04 ESM:
  bind9                           1:9.8.1.dfsg.P1-4ubuntu0.31

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

References

https://ubuntu.com/security/notices/USN-4468-2

https://ubuntu.com/security/notices/USN-4468-1

CVE-2020-8622

Severity
critical
Lowest
Low
Medium
High
Critical

August 24, 2020

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu bind9 crash

Package Information

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