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Ubuntu Security Notice USN-4058-2

Ubuntu Security Notice USN-4058-2
Posted Aug 5, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4058-2 - USN-4058-1 fixed a vulnerability in bash. This update provides the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM. It was discovered that Bash incorrectly handled the restricted shell. An attacker could possibly use this issue to escape restrictions and execute any command. Various other issues were also addressed.

tags | advisory, shell, bash
systems | linux, ubuntu
advisories | CVE-2019-9924
MD5 | 39a86cf8b87a3b8b7d8f4058195385f5

Ubuntu Security Notice USN-4058-2

Change Mirror Download
=========================================================================
Ubuntu Security Notice USN-4058-2
August 05, 2019

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

- Ubuntu 14.04 ESM
- Ubuntu 12.04 ESM

Summary:

A system hardening measure could be bypassed.

Software Description:
- bash: GNU Bourne Again SHell

Details:

USN-4058-1 fixed a vulnerability in bash. This update provides
the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM.

Original advisory 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 14.04 ESM:
bash 4.3-7ubuntu1.8+esm1

Ubuntu 12.04 ESM:
bash 4.2-2ubuntu2.8

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

References:
https://usn.ubuntu.com/4058-2
https://usn.ubuntu.com/4058-1
CVE-2019-9924

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