Re: [secdir] SECDIR review of draft-ietf-eman-energy-aware-mib-15
Benoit Claise <bclaise@cisco.com> Tue, 08 July 2014 07:15 UTC
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Date: Tue, 08 Jul 2014 09:15:43 +0200
From: Benoit Claise <bclaise@cisco.com>
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To: Stephen Kent <kent@bbn.com>, secdir <secdir@ietf.org>, jparello@cisco.com, moulchan@cisco.com, n.brownlee@auckland.ac.nz, tnadeau@lucidvision.com, joel jaeggli <joelja@bogus.com>
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Archived-At: http://mailarchive.ietf.org/arch/msg/secdir/tXpVOfSXexlyVIujND8L7jcnUnw
Subject: Re: [secdir] SECDIR review of draft-ietf-eman-energy-aware-mib-15
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Stephen, draft-ietf-eman-energy-aware-mib-v16 has been posted with the correct Security boilerplate. Regards, Benoit > > I reviewed this document as part of the security directorate's ongoing > effort to review all IETF documents being processed by the IESG.These > comments were written primarily for the benefit of the security area > directors.Document editors and WG chairs should treat these comments > just like any other last call comments. Since I am not a MIB expert, > my comments are strictly related to the security-relevant aspects of > this document. > > This document, as its name implies, defines a MIB for energy > management devices. Given increasing concern over security in the > so-called "cyber-physical" realm, a MIB for such devices clearly > merits scrutiny. Also, to the extent that such devices (e.g., meters) > might be associated with residences, there are personal privacy issues > that ought to be addressed, in the PERPASS era. > > The document is clearly written; my compliments to the authors in that > regard. The one odd thing I noted was that Sections 11.1 and 11.2 > appear between Sections 6 and 7! I think this was a cut and paste > error that is easily remedied. > > The Security Considerations section (7) is about one-half page in > length. I have several concerns with the text here. > > First, the text says "It is thus important to control even GET and/or > NOTIFY access to these objects and possibly to even encrypt the values > of these objects when sending them over the network via SNMP." This > seems to be an understatement. I'd like to see the text here RECOMMEND > use of encryption to provide confidentiality. This would be supportive > of personal privacy, in residential contexts, and physical security in > residential and enterprise settings. I can imagine a movie in which > burglars use a lack of encryption to gain critical information about > building infrastructure from a an energy MIB J. > > The text later says "There are a number of management objects defined > in these MIB modules with a MAX-ACCESS clause of read-write and/or > read-create.Such objects MAY be considered sensitive or vulnerable in > some network environments.The support for SET operations in a > non-secure environment without proper protection can have a negative > effect on network operations. Again, this strikes me as a significant > understatement, i.e., the scope of the "negative effect" could be much > broader that just a network. (Power outlets are cited as examples of > objects, so anything plugged into an outlet could be effected, right?) > There should be more emphasis on the need for access control. > > The text later says "SNMP versions prior to SNMPv3 did not include > adequate security. Even if the network itself is secure (for example, > by using IPsec), there is still no secure control over who on the > secure network is allowed to access and GET/SET > (read/change/create/delete) the objects in these MIB modules." This is > a misleading. IPsec natively provides access control. It would be > accurate to say that the access controls offered by IPsec would only > limit who could access the MIB. What the authors seem to suggest here > is finer-grained access control, so that one can manage GET/SET > privileges for the set of individuals who are authorized to connect to > the MIB via the SMTP port, right? > > The text discussing use of SNMPv3 security is a bit confusing. > > It RECOMMENDS that implementers "consider" SMNPv3 security features, > but then says deployment of SNMP versions prior to v3 is NOT > RECOMMENDED. The first paragraph discussing this topic deals with > thinking about support (vs. use) of SNMPv3, while the second paragraph > makes a much stronger statement about deployment. It would be more > consistent to mandate support (MUST or SHOULD) for SNMPv3 in entities > that incorporate this MIB. Separately the document can RECOMMEND > enabling SNMPv3 security features in deployments, for the reasons cited.
- [secdir] SECDIR review of draft-ietf-eman-energy-… Stephen Kent
- Re: [secdir] SECDIR review of draft-ietf-eman-ene… Juergen Schoenwaelder
- Re: [secdir] SECDIR review of draft-ietf-eman-ene… Stephen Kent
- Re: [secdir] SECDIR review of draft-ietf-eman-ene… Benoit Claise
- Re: [secdir] SECDIR review of draft-ietf-eman-ene… Benoit Claise