The remote host is missing updates announced in advisory CLSA-2006:1061.
This announcement fixes a stack-based buffer overflow vulnerability in the ldif_get_line function in ldif.c of Sylpheed before 2.1.6 that allows user-complicit attackers to execute arbitrary code by having local users import LDIF files with long lines.
Solution: The apt tool can be used to perform RPM package upgrades by running 'apt-get update' followed by 'apt-get upgrade'