Ubuntu 12.04 LTS USN-1521-1 Critical IcedTea-Web Remote Execution

ubuntu

July 31, 2012

The IcedTea-Web Java web browser plugin could be made to crash orpossibly run programs as your login if it opened a specially craftedapplet.

Summary

The IcedTea-Web Java web browser plugin could be made to crash or

possibly run programs as your login if it opened a specially crafted

applet.

Software Description:

- icedtea-web: A web browser plugin to execute Java applets

Details:

Chamal De Silva discovered that the IcedTea-Web Java web browser

plugin could dereference an uninitialized pointer. A remote attacker

could use this to craft a malicious web page that could cause a

denial of service by crashing the web browser or possibly execute

arbitrary code. (CVE-2012-3422)

Steven Bergom and others discovered that the IcedTea-Web Java web

browser plugin assumed that all strings provided by browsers are NULL

terminated, which is not guaranteed by the NPAPI (Netscape Plugin

Application Programming Interface). A remote attacker could use this

to craft a malicious Java applet that could cause a denial of service

by crashing the web browser, expose sensitive information or possibly

execute arbitrary code. (CVE-2012-3423)

Topics Covered

security advisory denial of service critical remote code execution ubuntu icedtea-web

Update Instructions

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

Ubuntu 12.04 LTS:
  icedtea-6-plugin                1.2-2ubuntu1.1
  icedtea-7-plugin                1.2-2ubuntu1.1

Ubuntu 11.10:
  icedtea-6-plugin                1.2-2ubuntu0.11.10.2

Ubuntu 11.04:
  icedtea-6-plugin                1.2-2ubuntu0.11.04.2

Ubuntu 10.04 LTS:
  icedtea-6-plugin                1.2-2ubuntu0.10.04.2

After a standard system update you need to restart your web browser to make
all the necessary changes.