Ubuntu Security Notice USN-4740-1
February 18, 2021
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
Apache Shiro could be made to crash if it received specially
- shiro: Powerful and easy-to-use Java security framework
It was discovered that Apache Shiro mishandled specially crafted
attacker could use this vulnerability to bypass authentication mechanisms.
The problem can be corrected by updating your system to the
Ubuntu 20.04 LTS:
Ubuntu 18.04 LTS:
In general, a standard system update will make all the necessary changes.