Some vulnerabilities have been reported in Thunderbird, which can be exploited by malicious people to bypass certain security restrictions, gain knowledge of potentially sensitive information, conduct cross-site scripting attacks and compromise a user's system.

1) The problem is that scripts in XBL controls in e-mails can be executed even when JavaScript has been disabled (JavaScript is disabled by default). This does not pose any direct security risks by itself, but may enable exploitation of vulnerabilities requiring JavaScript.

2) An error where certain DHTML properties are not properly protected from being modified can be exploited to execute arbitrary HTML and script code in a user's browser session in context of an affected site.

For more information:
SA15549

3) An input validation error in the handling of unexpected JavaScript objects passed to the "InstallVersion.compareTo()" function may be exploited to execute arbitrary code.

4) An error in the handling of DOM node names with different namespaces can be exploited to execute arbitrary script code with escalated privileges via a specially crafted XHTML document.

Successful exploitation allows execution of arbitrary code.

5) An error caused due to insecure cloning of base objects can be exploited to execute arbitrary script code with escalated privileges.

6) Some errors, where certain privileged UI code does not properly validate DOM nodes from the content window, can be exploited to execute arbitrary code.

Successful exploitation may require some user interaction.

7) Some input validation errors when handling parameters of invalid types passed to certain "InstallTrigger" and "XPInstall" related objects via JavaScript may be exploited to execute arbitrary code.

8) An error in the JavaScript engine, as a "lambda" replace exposes arbitrary amounts of heap memory after the end of a JavaScript string, may be exploited to disclose sensitive information in memory.

For more information:
SA14820

Solution
Update to version 1.0.5.
Further details available in Customer Area

Provided and/or discovered by
1) moz_bug_r_a4
2) Andreas Sandblad, Secunia Research
3) shutdown
4) moz_bug_r_a4
5) moz_bug_r_a4 and shutdown
6) moz_bug_r_a4
7) Georgi Guninski
8) Azafran

Changelog
Further details available in Customer Area

Original Advisory
1) http://www.mozilla.org/security/announce/mfsa2005-46.html
2) http://www.mozilla.org/security/announce/mfsa2005-52.html
3) http://www.mozilla.org/security/announce/mfsa2005-50.html
4) http://www.mozilla.org/security/announce/mfsa2005-55.html
5) http://www.mozilla.org/security/announce/mfsa2005-56.html
6) http://www.mozilla.org/security/announce/mfsa2005-44.html
http://www.mozilla.org/security/announce/mfsa2005-41.html
7) http://www.mozilla.org/security/announce/mfsa2005-40.html
8) http://www.mozilla.org/security/announce/mfsa2005-33.html

Other references
Further details available in Customer Area

Deep Links
Links available in Customer Area