Critical: thunderbird security update

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 critical security impact by the Red
Hat Security Response Team.

[Updated 27th February 2008]
The erratum text has been updated to include the details of additional
issues that were fixed by these erratum packages, but which were not public
at the time of release. No changes have been made to the packages.

Mozilla Thunderbird is a standalone mail and newsgroup client.

A heap-based buffer overflow flaw was found in the way Thunderbird
processed messages with external-body Multipurpose Internet Message
Extensions (MIME) types. A HTML mail message containing malicious content
could cause Thunderbird to execute arbitrary code as the user running
Thunderbird. (CVE-2008-0304)

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-2008-0412, CVE-2008-0413, CVE-2008-0415,
CVE-2008-0419)

Several flaws were found in the way Thunderbird displayed malformed HTML
mail content. A HTML mail message containing specially-crafted content
could trick a user into surrendering sensitive information. (CVE-2008-0420,
CVE-2008-0591, CVE-2008-0593)

A flaw was found in the way Thunderbird handles certain chrome URLs. If a
user has certain extensions installed, it could allow a malicious HTML mail
message to steal sensitive session data. Note: this flaw does not affect a
default installation of Thunderbird. (CVE-2008-0418)

Note: JavaScript support is disabled by default in Thunderbird; the above
issues are not exploitable unless JavaScript is enabled.

A flaw was found in the way Thunderbird saves certain text files. If a
remote site offers a file of type "plain/text", rather than "text/plain",
Thunderbird will not show future "text/plain" content to the user, forcing
them to save those files locally to view the content. (CVE-2008-0592)

Users of thunderbird are advised to upgrade to these updated packages,
which contain backported patches to resolve these issues.

Before applying this update, make sure that all previously-released
errata relevant to your system have been applied.

This update is available via Red Hat Network. Details on how to use
the Red Hat Network to apply this update are available at
http://kbase.redhat.com/faq/FAQ_58_10188

431732 - CVE-2008-0412 Mozilla layout engine crashes
431733 - CVE-2008-0413 Mozilla javascript engine crashes
431739 - CVE-2008-0415 Mozilla arbitrary code execution
431748 - CVE-2008-0418 Mozilla chrome: directory traversal
431749 - CVE-2008-0419 Mozilla arbitrary code execution
431751 - CVE-2008-0591 Mozilla information disclosure flaw
431752 - CVE-2008-0592 Mozilla text file mishandling
431756 - CVE-2008-0593 Mozilla URL token stealing flaw
435123 - CVE-2008-0304 thunderbird/seamonkey: MIME External-Body Heap Overflow Vulnerability

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-0304
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-0412
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-0413
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-0415
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-0418
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-0419
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-0420
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-0591
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-0592
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-0593
http://www.redhat.com/security/updates/classification/#critical