[USN-5133-1] ICU vulnerability

========================================================================== Ubuntu Security Notice USN-5133-1 November 04, 2021
A security issue was fixed in ICU ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 18.04 LTS – Ubuntu 16.04 ESM – Ubuntu 14.04 ESM
ICU could be made to crash if it received specially crafted input.
Software Description: – icu: International Components for Unicode library
It was discovered that ICU contains a use after free issue. An attacker could use this issue to cause a denial of service with crafted input.
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 18.04 LTS: icu-devtools 60.2-3ubuntu3.2 libicu60 60.2-3ubuntu3.2 libiculx60 60.2-3ubuntu3.2
Ubuntu 16.04 ESM: icu-devtools 55.1-7ubuntu0.5+esm1 libicu55 55.1-7ubuntu0.5+esm1
Ubuntu 14.04 ESM: icu-devtools 52.1-3ubuntu0.8+esm2 libicu52 52.1-3ubuntu0.8+esm2
In general, a standard system update will make all the necessary changes.
References: ubuntu.com/security/notices/USN-5133-1 CVE-2020-21913
Package Information: launchpad.net/ubuntu/+source/icu/60.2-3ubuntu3.2