Moderate: thunderbird security updateMozilla Thunderbird is a standalone mail and newsgroup client.A cross-site scripting flaw was found in the way Thunderbird handled thejar: URI scheme. It may be possible for a malicious HTML mail message toleverage this flaw, and conduct a cross-site scripting attack against auser running Thunderbird. (CVE-2007-5947)Several flaws were found in the way Thunderbird processed certain malformedHTML mail content. A HTML mail message containing malicious content couldcause Thunderbird to crash, or potentially execute arbitrary code as theuser running Thunderbird. (CVE-2007-5959)A race condition existed when Thunderbird set the "window.location"property when displaying HTML mail content. This flaw could allow a HTMLmail message to set an arbitrary Referer header, which may lead to aCross-site Request Forgery (CSRF) attack against websites that rely only onthe Referer header for protection. (CVE-2007-5960) All users of thunderbird are advised to upgrade to these updated packages,which contain backported patches to resolve these issues.