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 "private" 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.
This string is a known default community string on SCO Open Server 5.0.5.
If you use this system, please see the specific solution below.