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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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