The remote host is running a version of cyrus-imsp (Internet Message Support Protocol) which has a buffer overflow bug. An attacker could exploit this bug to execute arbitrary code on this system with the privileges of the root user. The overflow occurs when the user issues a too long argument as his name, causing an overflow in the abook_dbname function command.

Upgrade cyrus-imsp server to version version 1.6a4 or 1.7a