USN-3968-1: Sudo vulnerabilities

6 May 2019

sudo vulnerabilities

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

  • Ubuntu 16.04 LTS

Summary

Several security issues were fixed in Sudo.

Software Description

  • sudo - Provide limited super user privileges to specific users

Details

Florian Weimer discovered that Sudo incorrectly handled the noexec restriction when used with certain applications. A local attacker could possibly use this issue to bypass configured restrictions and execute arbitrary commands. (CVE-2016-7076)

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 16.04 LTS
sudo - 1.8.16-0ubuntu1.6
sudo-ldap - 1.8.16-0ubuntu1.6

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References