[USN-5156-1] ICU vulnerability

========================================================================== Ubuntu Security Notice USN-5156-1 November 24, 2021
A security issue was fixed in ICU ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 21.04 – Ubuntu 20.04 LTS
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 double free issue. An attacker could use this issue to cause a denial of service or possibly execute arbitrary code.
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 21.04: icu-devtools 67.1-6ubuntu2.1 libicu-dev 67.1-6ubuntu2.1 libicu67 67.1-6ubuntu2.1
Ubuntu 20.04 LTS: icu-devtools 66.1-2ubuntu2.1 libicu-dev 66.1-2ubuntu2.1 libicu66 66.1-2ubuntu2.1
In general, a standard system update will make all the necessary changes.
References: ubuntu.com/security/notices/USN-5156-1 CVE-2021-30535
Package Information: launchpad.net/ubuntu/+source/icu/67.1-6ubuntu2.1 launchpad.net/ubuntu/+source/icu/66.1-2ubuntu2.1