=========================================================================Ubuntu Security Notice USN-5089-1
September 23, 2021

ca-certificates update
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 21.04
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

A certificate about to expire was removed from ca-certificates.

Software Description:
- ca-certificates: Common CA certificates

Details:

The ca-certificates package contained a CA certificate that will expire on
2021-09-30 and will cause connectivity issues. This update removes the
“DST Root CA X3” CA.

Update instructions:

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

Ubuntu 21.04:
  ca-certificates                 20210119ubuntu0.21.04.1

Ubuntu 20.04 LTS:
  ca-certificates                 20210119~20.04.2

Ubuntu 18.04 LTS:
  ca-certificates                 20210119~18.04.2

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

References:
  https://ubuntu.com/security/notices/USN-5089-1
  https://bugs.launchpad.net/ubuntu/+source/ca-certificates/+bug/1944481

Package Information:
  https://launchpad.net/ubuntu/+source/ca-certificates/20210119ubuntu0.21.04.1
  https://launchpad.net/ubuntu/+source/ca-certificates/20210119~20.04.2
  https://launchpad.net/ubuntu/+source/ca-certificates/20210119~18.04.2