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==========================================================================
Ubuntu Security Notice USN-3304-1
May 30, 2017

sudo vulnerability
==========================================================================

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

- Ubuntu 17.04
- Ubuntu 16.10
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS

Summary:

Sudo could be made to overwrite files as the administrator.

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

Details:

It was discovered that Sudo did not properly parse the contents of
/proc/[pid]/stat when attempting to determine its controlling tty.
A local attacker in some configurations could possibly use this to
overwrite any file on the filesystem, bypassing intended permissions.

Update instructions:

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

Ubuntu 17.04:
  sudo                            1.8.19p1-1ubuntu1.1
  sudo-ldap                       1.8.19p1-1ubuntu1.1

Ubuntu 16.10:
  sudo                            1.8.16-0ubuntu3.2
  sudo-ldap                       1.8.16-0ubuntu3.2

Ubuntu 16.04 LTS:
  sudo                            1.8.16-0ubuntu1.4
  sudo-ldap                       1.8.16-0ubuntu1.4

Ubuntu 14.04 LTS:
  sudo                            1.8.9p5-1ubuntu1.4
  sudo-ldap                       1.8.9p5-1ubuntu1.4

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

References:
  https://www.ubuntu.com/usn/usn-3304-1
  CVE-2017-1000367

Package Information:
  https://launchpad.net/ubuntu/+source/sudo/1.8.19p1-1ubuntu1.1
  https://launchpad.net/ubuntu/+source/sudo/1.8.16-0ubuntu3.2
  https://launchpad.net/ubuntu/+source/sudo/1.8.16-0ubuntu1.4
  https://launchpad.net/ubuntu/+source/sudo/1.8.9p5-1ubuntu1.4


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