USN-4305-1: ICU vulnerability

17 March 2020

icu vulnerability

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


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

Software Description

  • icu - International Components for Unicode library


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 -

To update your system, please follow these instructions:

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