Ubuntu Security Notice 2428-1 – Gary Kwong, Randell Jesup, Nils Ohlmeier, Jesse Ruderman, and Max Jonas Werner 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. Joe Vennix discovered a crash when using XMLHttpRequest in some circumstances. If a user were tricked in to opening a specially crafted message with scripting enabled, an attacker could potentially exploit this to cause a denial of service. Various other issues were also addressed.