==========================================================================
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

—–BEGIN PGP SIGNATURE—–
Version: GnuPG v1
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=NUXA
—–END PGP SIGNATURE—–
—