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Thunderbird is a free, open-source and cross-platform mail client for most operating systems including, but not limited to, Windows, Linux and Macintosh. It is based on the Mozilla codebase. It is a robust and easy to use client, similar to competing products like Outlook Express, but with some major advantages such as junk mail classification.

This Thunderbird 1.5.0.9 release provides stability and security enhancements for a safer email experience to all users. All Thunderbird users are recommended to upgrade to this latest version.

Fixed in Thunderbird 1.5.0.9:

• Mail header processing heap overflows
• Mozilla SVG Processing Remote Code Execution
• XSS by setting img.src to javascript: URI
• LiveConnect crash finalizing JS objects
• Privilege escallation using watch point
• CSS cursor image buffer overflow (Windows only)
• Crashes with evidence of memory corruption (rv:1.8.0.9/1.8.1.1)

For more information, refer to the Mozilla Thunderbird 1.5.0.9 release notes. This release is available in 37 languages including Spanish, Japanese, Arabic, Hungarian and more.