The Icedtea-Web plugin could be made to crash or run programs as your login if it opened a specially crafted web page.
Arthur Gerkis discovered a buffer overflow in the Icedtea-Web plugin. If a user were tricked into opening a malicious website, an attacker could cause the plugin to crash or possibly execute arbitrary code as the user invoking the program.
7 November 2012
A security issue affects these releases of Ubuntu and its derivatives:
The Icedtea-Web plugin could be made to crash or run programs as your login if it opened a specially crafted web page.
Arthur Gerkis discovered a buffer overflow in the Icedtea-Web plugin. If a user were tricked into opening a malicious website, an attacker could cause the plugin to crash or possibly execute arbitrary code as the user invoking the program.
The problem can be corrected by updating your system to the following package versions:
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
After a standard system update you need to restart your browser to make all the necessary changes.