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Re: [midcom] security recommendations in MIDCOM MIB draft



Juergen Quittek skrev:
Dear all,

The MIDCOM MIB is progressing and currently under IESG review.
Tim Polk made a comment that I would like to discuss here on this list.

In the draft, we explicitly state hat a MIDCOM MIB implementation
MUST support SNMPv3.  However, we pass the responsibility of switching
on SNMPv3 to the operator.  The operator may still run SNMPv1 or SNMPv2
if security is provided otherwise:

 "Compliant MIDCOM MIB implementations MUST support SNMPv3 security
  services including data integrity, data origin authentication and
  data confidentiality.

  It is REQUIRED that the implementations support the security features
  as provided by the SNMPv3 framework.  Specifically, the use of the
  User-based Security Model RFC 3414 [RFC3414] and the View- based
  Access Control Model RFC 3415 [RFC3415] is RECOMMENDED.

  It is then a customer/operator responsibility to ensure that the SNMP
  entity giving access to an instance of this MIB, is properly
  configured to give access to the objects only to those principals
  (users) that have legitimate rights to indeed GET or SET
  (change/create/delete) them."

Now, Tim suggests to explicitly deprecate the use of (insecure) previous
versions of SNMP, for example with a phrase like

 "Deployment of SNMP versions prior to SNMPv3 is NOT RECOMMENDED.
  Instead it is RECOMMENDED to deploy SNMPv3 and to enable
  cryptographic security."

Are there any opinions about adding such a phrase to the security
considerations?


To make sure I understand this correctly. Without SNMPv3 and its security functions the MIDCOM MIB will not reach the security requirements identified? If this is true, I think it is quite clear that MIDCOM MIB should only be used with SNMPv3.


Cheers

Magnus Westerlund

IETF Transport Area Director & TSVWG Chair
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Multimedia Technologies, Ericsson Research EAB/TVM/M
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Ericsson AB                | Phone +46 8 4048287
Torshamsgatan 23           | Fax   +46 8 7575550
S-164 80 Stockholm, Sweden | mailto: magnus.westerlund at ericsson.com
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