USN-5380-1: Bash vulnerability

Releases

• Ubuntu 20.04 LTS
• Ubuntu 18.04 ESM
• Ubuntu 16.04 ESM
• Ubuntu 14.04 ESM

Packages

• 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

• bash - 5.0-6ubuntu1.2

Ubuntu 18.04

• bash - 4.4.18-2ubuntu1.3

Ubuntu 16.04

• bash - 4.3-14ubuntu1.4+esm1
  Available with Ubuntu Pro

Ubuntu 14.04

• bash - 4.3-7ubuntu1.8+esm2
  Available with Ubuntu Pro

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

References

• CVE-2019-18276