Updated thunderbird packages that fix several security issues are now
available for Red Hat Enterprise Linux 4 and 5.
This update has been rated as having moderate security impact by the Red
Hat Security Response Team.
Mozilla Thunderbird is a standalone mail and newsgroup client.
A cross-site scripting flaw was found in the way Thunderbird handled the
jar: URI scheme. It may be possible for a malicious HTML mail message to
leverage this flaw, and conduct a cross-site scripting attack against a
user running Thunderbird. (CVE-2007-5947)
Several flaws were found in the way Thunderbird processed certain malformed
HTML mail content. A HTML mail message containing malicious content could
cause Thunderbird to crash, or potentially execute arbitrary code as the
user 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 HTML
mail message to set an arbitrary Referer header, which may lead to a
Cross-site Request Forgery (CSRF) attack against websites that rely only on
the 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.