Secunia

Some vulnerabilities have been reported in Mozilla Thunderbird, which potentially can be exploited by malicious people to compromise a user's system.

1) An integer overflow within the handling of emails formatted as text/richtext or text/enhanced may be exploited to execute arbitrary code, but requires that a malicious email includes a 400 megabyte long line.

2) See vulnerabilities #2 and #9 for more information:
SA24205

Solution
Update to version 1.5.0.10.

Provided and/or discovered by
1) Georgi Guninski

Changelog
Further details available in Customer Area

Original Advisory
http://www.mozilla.org/security/announce/2007/mfsa2007-10.html

Other references
Further details available in Customer Area

Deep Links
Links available in Customer Area