The ACL plugin in Dovecot before 1.1.4 allows attackers to bypass intended access restrictions by using the "k" right to create unauthorized "parent/child/child" mailboxes.

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.

Directory traversal vulnerability in index/mbox/mbox-storage.c in Dovecot before 1.0.rc29, when using the zlib plugin, allows remote attackers to read arbitrary gzipped (.gz) mailboxes (mbox files) via a .. (dot dot) sequence in the mailbox name.

Off-by-one buffer overflow in Dovecot 1.0test53 through 1.0.rc14, and possibly other versions, when index files are used and mmap_disable is set to "yes," allows remote authenticated IMAP or POP3 users to cause a denial of service (crash) via unspecified vectors involving the cache file.

Directory traversal vulnerability in Dovecot 1.0 beta and 1.0 allows remote attackers to list files and directories under the mbox parent directory and obtain mailbox names via ".." sequences in the (1) LIST or (2) DELETE IMAP command.