TAILIEUCHUNG - Security in SNMPv3 versus SNMPv1 or v2c

Considering these attack vulnerabilities and scenarios it is clear that the typical BCS is not a desirable target. System resources are limited (storage space, CPU power, common OS and software packages, etc.), and valuable information is limited to the BCS system itself (configuration data, router tables) but no financial or personal information. How- ever, this may change: as the BCS is connected to more and more service providers— giving access to more information either stored locally or providing a secured path to outside service providers’ networks; and as the overall intelligence contained on the BCS network increases to accommodate smarter distributed controls. | Ubizen AETHIS Member of the Ubizen group Security in SNMPv3 versus SNMPvl or v2c Introduction Simple Network Management Protocol SNMP is an interoperable standards-based protocol that allows for external monitoring of the Content Engine through an SNMP agent. An SNMP-managed network consists of three primary components managed devices agents and management systems. A managed device is a network node that contains an SNMP agent and resides on a managed network. Managed devices collect and store management information and use SNMP to make this information available to management systems that use SNMP. Managed devices include routers access servers switches bridges hubs computer hosts and printers. An agent is a software module that has local knowledge of management information and translates that information into a form compatible with SNMP the Management Information Base MIB . The agent can send traps or notification of certain events to the manager. A manager is a software module that listens to the SNMP notifications sent by SNMP agents. The manager can also send requests to an agent to collect remote information from the Management Information Base MIB . The communication between the agent and the manager uses the SNMP protocol which is an application of the BER Abstract Syntax Notation 1 with Basic Encoding Rules typically over UDP for IP networks . Version 1 SNMPv1 described in RFC 1157 is the initial implementation of SNMP. Version 2 SNMPv2c described in RFC 1902 is the second release of SNMP. It provides additions to data types counter size and protocol operations. Version 3 SNMPv3 described in RFC 2271 through RFC 2275 is the most recent version of SNMP. It became a full IETF standard making SNMPv1 and v2c historical. Threats of Network Security and their Relation to Network Management SNMP version 1 or SNMPv1 has enjoyed unparalleled success as an interoperable management solution. However it had multiple shortcomings the most notable of which was its

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