Ubuntu alert USN-4263-1 (sudo)

From:
             
 
Marc Deslauriers <marc.deslauriers@canonical.com> 
To:
             
 
"ubuntu-security-announce@lists.ubuntu.com" <ubuntu-security-announce@lists.ubuntu.com> 
Subject:
             
 
[USN-4263-1] Sudo vulnerability 
Date:
             
 
Mon, 3 Feb 2020 09:27:48 -0500
Message-ID:
             
 
<8242fc3a-2d23-143b-6dd3-4efcc6e3efd7@canonical.com>
==========================================================================
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://usn.ubuntu.com/4263-1
  CVE-2019-18634

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

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