exploit the possibilities

Ubuntu Security Notice USN-3968-2

Ubuntu Security Notice USN-3968-2
Posted May 30, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3968-2 - USN-3968-1 fixed a vulnerability in Sudo. This update provides the corresponding update for Ubuntu 14.04 ESM. 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. Various other issues were also addressed.

tags | advisory, local
systems | linux, ubuntu
advisories | CVE-2017-1000368
MD5 | 621daad93980fa50fa8d9db419541056

Ubuntu Security Notice USN-3968-2

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-3968-2
May 29, 2019

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

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

- Ubuntu 14.04 ESM

Summary:

Sudo could be made to overwrite files if it received a specially
crafted input.

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

Details:

USN-3968-1 fixed a vulnerability in Sudo. This update provides
the corresponding update for Ubuntu 14.04 ESM.

Original advisory 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.
(CVE-2017-1000368)

Update instructions:

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

Ubuntu 14.04 ESM:
sudo 1.8.9p5-1ubuntu1.5+esm1
sudo-ldap 1.8.9p5-1ubuntu1.5+esm1

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

References:
https://usn.ubuntu.com/usn/usn-3968-2
https://usn.ubuntu.com/usn/usn-3968-1
CVE-2017-1000368

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