A ICU security update has been released for Ubuntu Linux 19.10, 18.04 LTS, 16.04 LTS, 14.04 ESM, and 12.04 ESM.

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Ubuntu Security Notice USN-4305-1
March 17, 2020

icu vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 19.10
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
- Ubuntu 14.04 ESM
- Ubuntu 12.04 ESM

Summary:

ICU could be made to execute arbitrary code if it received a specially crafted
string.

Software Description:
- icu: International Components for Unicode library

Details:

André Bargull discovered that ICU incorrectly handled certain strings.
An attacker could possibly use this issue to execute arbitrary code.

Update instructions:

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

Ubuntu 19.10:
libicu63 63.2-2ubuntu0.1

Ubuntu 18.04 LTS:
libicu60 60.2-3ubuntu3.1

Ubuntu 16.04 LTS:
libicu55 55.1-7ubuntu0.5

Ubuntu 14.04 ESM:
libicu52 52.1-3ubuntu0.8+esm1

Ubuntu 12.04 ESM:
libicu48 4.8.1.1-3ubuntu0.10

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

References:
  https://usn.ubuntu.com/4305-1
CVE-2020-10531

Package Information:
  https://launchpad.net/ubuntu/+source/icu/63.2-2ubuntu0.1
  https://launchpad.net/ubuntu/+source/icu/60.2-3ubuntu3.1
  https://launchpad.net/ubuntu/+source/icu/55.1-7ubuntu0.5