The Mozilla Thunderbird mail client is a redesign of the Mozilla Mail component.
A number of vulnerabilities have been found and fixed in Mozilla Thunderbird. For details please consult the references below.
The most severe vulnerabilities might lead to the execution of arbitrary code with the rights of the user running the application. Other vulnerabilities include program crashes and the acceptance of forged certificates.
There is no known workaround at this time.
All Mozilla Thunderbird users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=mail-client/mozilla-thunderbird-1.5.0.7"
All Mozilla Thunderbird binary users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=mail-client/mozilla-thunderbird-bin-1.5.0.7"