=========================================================================Ubuntu Security Notice USN-4263-1
February 03, 2020

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

- Ubuntu 19.10
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

Sudo could allow unintended access to the administrator account.

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

Details:

Joe Vennix discovered that Sudo incorrectly handled memory operations when
the pwfeedback option is enabled. A local attacker could possibly use this
issue to obtain unintended access to the administrator account.

Update instructions:

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

Ubuntu 19.10:
  sudo                            1.8.27-1ubuntu4.1
  sudo-ldap                       1.8.27-1ubuntu4.1

Ubuntu 18.04 LTS:
  sudo                            1.8.21p2-3ubuntu1.2
  sudo-ldap                       1.8.21p2-3ubuntu1.2

Ubuntu 16.04 LTS:
  sudo                            1.8.16-0ubuntu1.9
  sudo-ldap                       1.8.16-0ubuntu1.9

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

References:
  https://ubuntu.com/security/notices/USN-4263-1
  CVE-2019-18634

Package Information:
  https://launchpad.net/ubuntu/+source/sudo/1.8.27-1ubuntu4.1
  https://launchpad.net/ubuntu/+source/sudo/1.8.21p2-3ubuntu1.2
  https://launchpad.net/ubuntu/+source/sudo/1.8.16-0ubuntu1.9

Ubuntu 4263-1: Sudo vulnerability

February 3, 2020
Sudo could allow unintended access to the administrator account.

Summary

Update Instructions

The problem can be corrected by updating your system to the following package versions: Ubuntu 19.10: sudo 1.8.27-1ubuntu4.1 sudo-ldap 1.8.27-1ubuntu4.1 Ubuntu 18.04 LTS: sudo 1.8.21p2-3ubuntu1.2 sudo-ldap 1.8.21p2-3ubuntu1.2 Ubuntu 16.04 LTS: sudo 1.8.16-0ubuntu1.9 sudo-ldap 1.8.16-0ubuntu1.9 In general, a standard system update will make all the necessary changes.

References

https://ubuntu.com/security/notices/USN-4263-1

CVE-2019-18634

Severity
February 03, 2020

Package Information

https://launchpad.net/ubuntu/+source/sudo/1.8.27-1ubuntu4.1 https://launchpad.net/ubuntu/+source/sudo/1.8.21p2-3ubuntu1.2 https://launchpad.net/ubuntu/+source/sudo/1.8.16-0ubuntu1.9

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