[USN-4263-1] Sudo vulnerability

Marc Deslauriers marc.deslauriers at canonical.com
Mon Feb 3 14:27:48 UTC 2020

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


Sudo could allow unintended access to the administrator account.

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


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.


Package Information:

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