=========================================================================Ubuntu Security Notice USN-1521-1
July 31, 2012

icedtea-web vulnerabilities
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 12.04 LTS
- Ubuntu 11.10
- Ubuntu 11.04
- Ubuntu 10.04 LTS

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)

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.

References:
  https://ubuntu.com/security/notices/USN-1521-1
  CVE-2012-3422, CVE-2012-3423

Package Information:
  https://launchpad.net/ubuntu/+source/icedtea-web/1.2-2ubuntu1.1
  https://launchpad.net/ubuntu/+source/icedtea-web/1.2-2ubuntu0.11.10.2
  https://launchpad.net/ubuntu/+source/icedtea-web/1.2-2ubuntu0.11.04.2
  https://launchpad.net/ubuntu/+source/icedtea-web/1.2-2ubuntu0.10.04.2