========================================================================= 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