The remote host is missing an update to hplip announced via advisory USN-1051-1.
Details follow:
Sebastian Krahmer discovered that HPLIP incorrectly handled certain long SNMP responses. A remote attacker could send malicious SNMP replies to certain HPLIP tools and cause them to crash or possibly execute arbitrary code.
Solution: The problem can be corrected by upgrading your system to the following package versions:
Ubuntu 8.04 LTS: hplip 2.8.2-0ubuntu8.2
Ubuntu 9.10: hplip 3.9.8-1ubuntu2.1
Ubuntu 10.04 LTS: hplip 3.10.2-2ubuntu2.2
Ubuntu 10.10: hplip 3.10.6-1ubuntu10.2
In general, a standard system update will make all the necessary changes.