Ubuntu Security Notice 2373-1 – Bobby Holley, Christian Holler, David Bolter, Byron Campen and Jon Coppeard discovered multiple memory safety issues in Thunderbird. If a user were tricked in to opening a specially crafted message with scripting enabled, an attacker could potentially exploit these to cause a denial of service via application crash, or execute arbitrary code with the privileges of the user invoking Thunderbird. Atte Kettunen discovered a buffer overflow during CSS manipulation. If a user were tricked in to opening a specially crafted message, an attacker could potentially exploit this to cause a denial of service via application crash or execute arbitrary code with the privileges of the user invoking Thunderbird. Various other issues were also addressed.