Dovecot before 1.0.11, when configured to use mail_extra_groups to
allow Dovecot to create dotlocks in /var/mail, might allow local users
to read sensitive mail files for other users, or modify files or
directories that are writable by group, via a symlink attack.
Note:References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
BUGTRAQ:20080304 Dovecot mail_extra_groups setting is often used insecurely
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