A Ruby security update has been released for Ubuntu Linux 16.04 ESM.

USN-5462-2: Ruby vulnerability

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Ubuntu Security Notice USN-5462-2
June 06, 2022

ruby2.3 vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 16.04 ESM

Summary:

Ruby could be made to crash or read sensitive information when
processing certain input.

Software Description:
- ruby2.3: Object-oriented scripting language

Details:

USN-5462-1 fixed several vulnerabilities in Ruby. This update provides
the corresponding CVE-2022-28739 update for ruby2.3 on Ubuntu 16.04 ESM.

Original advisory details:

It was discovered that Ruby incorrectly handled certain inputs.
An attacker could possibly use this issue to expose sensitive information.

Update instructions:

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

Ubuntu 16.04 ESM:
libruby2.3 2.3.1-2~ubuntu16.04.16+esm3
ruby2.3 2.3.1-2~ubuntu16.04.16+esm3

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

References:
https://ubuntu.com/security/notices/USN-5462-2
https://ubuntu.com/security/notices/USN-5462-1
CVE-2022-28739