The Simple Network Management Protocol (SNMP) is a commonly used network
service. Its primary function is to provide network administrators with
information about all kinds of network connected devices. SNMP can be
used to get and change system settings on a wide variety of devices, from
network servers, to routers and printers. The drawback to this service is
the authentication is an unencrypted "community string". In addition many
SNMP servers provide very simple default community strings.
The community string "agent" was found to have write access to the SNMP
server. This is a very serious condition and should be fixed as soon as
possible. Attackers with write access to an SNMP server can possibly execute
arbitrary commands with root level privilege. Attackers can shutdown machines,
stop, start, or change the priority of tasks, and gain valuable information.