Canonical published details about a few Thunderbird vulnerabilities that have been found in its Ubuntu 14.10, Ubuntu 14.04 LTS and Ubuntu 12.04 LTS operating systems and they have released a new version.

When a new Thunderbird version is released by Mozilla, it takes a few days until it arrives in the Ubuntu system. It's usually packed with fixes and improvements, on top of the stuff that's been done by the original devs.

“Armin Razmdjou discovered that contents of locally readable files could be made available via manipulation of form autocomplete in some circumstances. If a user were tricked into opening a specially crafted message with scripting enabled, an attacker could potentially exploit this to obtain sensitive information," reads the security notification.

For a more detailed description of the problems, you can see Canonical's security notification.

The flaws can be fixed if you upgrade your system(s) to the latest Thunderbird package specific to each distribution. To apply the patch, run the Update Manager application. You can also upgrade your system from the terminal:

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sudo apt-get update

sudo apt-get dist-upgrade

In general, a standard system update will make all the necessary changes. A restart of the application is required.