Description: A weakness has been reported in Dovecot, which can be exploited by malicious users to bypass certain security restrictions.
The weakness is caused due to an error within the handling of the "i" (insert) right in the ACL plugin, which can be exploited to save certain other flags (e.g. seen or deleted) via the APPEND or COPY commands without having the proper permissions.
The weakness is reported in versions prior to 1.0.3. Other versions may be also affected.
Solution: Update to version 1.0.3.
Provided and/or discovered by: Reported by the vendor.
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Ideas, suggestions, and other feedback are most welcome.
