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List:       ubuntu-security-announce
Subject:    [USN-3968-2] Sudo vulnerability
From:       "Leonidas S. Barbosa" <leo.barbosa () canonical ! com>
Date:       2019-05-29 17:36:24
Message-ID: 1559151384.10529.18.camel () canonical ! com
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==========================================================================
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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