Friday, February 19, 2021

Ubuntu Security Notice USN-4740-1

Ubuntu Security Notice USN-4740-1
February 18, 2021

shiro vulnerabilities
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 crafted

Software Description:
- shiro: Powerful and easy-to-use Java security framework


It was discovered that Apache Shiro mishandled specially crafted requests. An
attacker could use this vulnerability to bypass authentication mechanisms.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 20.04 LTS:
libshiro-java 1.3.2-4ubuntu0.1

Ubuntu 18.04 LTS:
libshiro-java 1.3.2-3~18.04.1

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

CVE-2020-11989, CVE-2020-1957

Package Information:

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