Updated sudo packages has been released for Ubuntu Linux

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Ubuntu Security Notice USN-4154-1
October 14, 2019

sudo vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 19.04
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
- Ubuntu 14.04 ESM
- Ubuntu 12.04 ESM

Summary:

Sudo could be made to run commands as root if it called with
a specially crafted user ID.

Software Description:
- sudo: Provide limited super user privileges to specific users

Details:

Joe Vennix discovered that Sudo incorrectly handled
certain user IDs. An attacker could potentially exploit this
to execute arbitrary commands as the root user.

Update instructions:

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

Ubuntu 19.04:
sudo 1.8.27-1ubuntu1.1
sudo-ldap 1.8.27-1ubuntu1.1

Ubuntu 18.04 LTS:
sudo 1.8.21p2-3ubuntu1.1
sudo-ldap 1.8.21p2-3ubuntu1.1

Ubuntu 16.04 LTS:
sudo 1.8.16-0ubuntu1.8
sudo-ldap 1.8.16-0ubuntu1.8

Ubuntu 14.04 ESM:
sudo 1.8.9p5-1ubuntu1.5+esm2
sudo-ldap 1.8.9p5-1ubuntu1.5+esm2

Ubuntu 12.04 ESM:
sudo 1.8.3p1-1ubuntu3.8
sudo-ldap 1.8.3p1-1ubuntu3.8

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

References:
https://usn.ubuntu.com/4154-1
CVE-2019-14287

Package Information:
https://launchpad.net/ubuntu/+source/sudo/1.8.27-1ubuntu1.1
https://launchpad.net/ubuntu/+source/sudo/1.8.21p2-3ubuntu1.1
https://launchpad.net/ubuntu/+source/sudo/1.8.16-0ubuntu1.8

  Sudo Security Update for Ubuntu