Ubuntu Security Notice 1122-3 - USN-1122-2 fixed vulnerabilities in Thunderbird on Ubuntu 11.04. A regression was introduced which caused Thunderbird to display an empty menu bar. This update fixes the problem. It was discovered that there was a vulnerability in the memory handling of certain types of content. An attacker could exploit this to possibly run arbitrary code as the user running Thunderbird. It was discovered that Thunderbird incorrectly handled certain JavaScript requests. If JavaScript were enabled, an attacker could exploit this to possibly run arbitrary code as the user running Thunderbird. Various other issues were also addressed
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