14 DAY TRIAL // On June 26, Canonical published details about Thunderbird vulnerabilities for its Ubuntu 13.04, Ubuntu 12.10, and Ubuntu 12.04 LTS operating systems in a security notice.
According to Canonical, several security issues have been fixed in Thunderbird.
For example, if the user were tricked into opening a specially crafted message with scripting enabled, an attacker could possibly exploit these to cause a denial of service via application crash, or to potentially execute arbitrary code with the privileges of the user invoking Thunderbird.
For a more detailed description of the security problems, you can visit Canonical's security notification.
Users can simply fix the security flaws by upgrading the operating systems to the Thunderbird package, specific to each distribution.
A normal system update, executed with the Update Manager, will implement all the necessary changes. After a standard system update, you will need to restart Thunderbird.
Users can also download Mozilla Thunderbird 17.0.7 right now from Softpedia.