Buffer overflow in the SIEVE script component (sieve/script.c), as used in
cyrus-imapd in Cyrus IMAP Server 2.2.13 and 2.3.14, and Dovecot 1.0 before
1.0.4 and 1.1 before 1.1.7, allows local users to execute arbitrary code
and read or modify arbitrary messages via a crafted SIEVE script, related
to the incorrect use of the sizeof operator for determining buffer length,
combined with an integer signedness error.

mdeslaur

version specified is of dovecot-sieve, not of the dovecot itself although code is present in dapper's dovecot, we don't compile the sieve plugin