Ubuntu Security Notices
USN-5156-1

USN-5156-1: ICU vulnerability

Publication date

24 November 2021

Overview

ICU could be made to crash if it received specially crafted input.

Releases

21.04 20.04 LTS

Packages

icu - International Components for Unicode library

Details

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

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

Learn more about how to get the fixes.

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

Ubuntu Release	Package Version
21.04 hirsute	icu-devtools – 67.1-6ubuntu2.1
	libicu67 – 67.1-6ubuntu2.1
	libicu-dev – 67.1-6ubuntu2.1
20.04 focal	icu-devtools – 66.1-2ubuntu2.1
	libicu66 – 66.1-2ubuntu2.1
	libicu-dev – 66.1-2ubuntu2.1

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References

CVE-2021-30535

CVE-2021-30535