USN-4058-1: Bash vulnerability

15 July 2019

bash vulnerability

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

  • Ubuntu 16.04 LTS

Summary

A system hardening measure could be bypassed.

Software Description

  • bash - GNU Bourne Again SHell

Details

It was discovered that Bash incorrectly handled the restricted shell. An attacker could possibly use this issue to escape restrictions and execute any command.

Update instructions

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

Ubuntu 16.04 LTS
bash - 4.3-14ubuntu1.4

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