========================================================================== Ubuntu Security Notice USN-5380-1 April 20, 2022
bash vulnerability ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 20.04 LTS – Ubuntu 18.04 LTS – Ubuntu 16.04 ESM – Ubuntu 14.04 ESM
Summary:
Bash could be used to escalate privileges.
Software Description: – bash: GNU Bourne Again SHell
Details:
It was discovered that Bash did not properly drop privileges when the binary had the setuid bit enabled. An attacker could possibly use this issue to escalate privileges.
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 20.04 LTS:   bash                            5.0-6ubuntu1.2
Ubuntu 18.04 LTS:   bash                            4.4.18-2ubuntu1.3
Ubuntu 16.04 ESM:   bash                            4.3-14ubuntu1.4+esm1
Ubuntu 14.04 ESM:   bash                            4.3-7ubuntu1.8+esm2
In general, a standard system update will make all the necessary changes.
References:   ubuntu.com/security/notices/USN-5380-1   CVE-2019-18276
Package Information:   launchpad.net/ubuntu/+source/bash/5.0-6ubuntu1.2   launchpad.net/ubuntu/+source/bash/4.4.18-2ubuntu1.3