U radu programskog paketa ICU uočen je novi sigurnosni propust. Napadač spomenuti propust može iskoristiti za DoS (eng. Denial of Service) napad te proizvoljno izvršavanje programskog koda.

==========================================================================
Ubuntu Security Notice USN-1348-1
January 26, 2012

icu vulnerability
==========================================================================

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

- Ubuntu 11.10
- Ubuntu 11.04
- Ubuntu 10.10
- Ubuntu 10.04 LTS

Summary:

ICU could be made to crash or run programs as your login if it
opened specially crafted data.

Software Description:
- icu: International Components for Unicode library

Details:

It was discovered that ICU did not properly handle invalid locale data
during Unicode conversion. If an application using ICU processed crafted
data, an attacker could cause it to crash or potentially execute arbitrary
code with the privileges of the user invoking the program.

Update instructions:

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

Ubuntu 11.10:
  libicu44                        4.4.2-2ubuntu0.11.10.1

Ubuntu 11.04:
  libicu44                        4.4.2-2ubuntu0.11.04.1

Ubuntu 10.10:
  libicu42                        4.2.1-3ubuntu0.10.10.1

Ubuntu 10.04 LTS:
  libicu42                        4.2.1-3ubuntu0.10.04.1

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

References:
  http://www.ubuntu.com/usn/usn-1348-1
  CVE-2011-4599

Package Information:
  https://launchpad.net/ubuntu/+source/icu/4.4.2-2ubuntu0.11.10.1
  https://launchpad.net/ubuntu/+source/icu/4.4.2-2ubuntu0.11.04.1
  https://launchpad.net/ubuntu/+source/icu/4.2.1-3ubuntu0.10.10.1
  https://launchpad.net/ubuntu/+source/icu/4.2.1-3ubuntu0.10.04.1