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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: ISCSI: Error in 10.3.3 of iscsi-08Paul, Sorry for the delay, I was on vacation. You are right of course, I had Bernard (who brought up this issue) review your suggestion and your second suggested text will be used. Thanks, Ofer Ofer Biran Storage and Systems Technology IBM Research Lab in Haifa biran@il.ibm.com 972-4-8296253 Paul Koning <pkoning@jlc.net>@ece.cmu.edu on 02/10/2001 19:16:55 Please respond to Paul Koning <pkoning@jlc.net> Sent by: owner-ips@ece.cmu.edu To: ips@ece.cmu.edu cc: Subject: ISCSI: Error in 10.3.3 of iscsi-08 The last paragraph of section 10.3.3 is badly misleading. 10.3.3 says about pre-shared key: "the only practical usage under this configuration is a group pre-shared key". That is clearly false. Standard practice for IPsec is that a pre-shared key is unique to a given pair of communicating entities. The only exception is when dynamic addresses are used, as discussed accurately in the security draft, section 5.8.2). As a minimum, 10.3.3 needs to be reworded so it describes the real world. The following text would do this: IKE main mode with pre-shared key authentication method SHOULD NOT be used (while pre-shared keys in many cases offer good security, situations where dynamically assigned addresses are used force the use of a group pre-shared key which creates vulnerability to man-in-the-middle attack). Preferably, the requirement should be changed so the reasoning for the restriction matches the restriction. The following text achieves this: IKE main mode with pre-shared key authentication method SHOULD NOT be used when either the initiator or the target uses dynamically assigned IP addresses (while pre-shared keys in many cases offer good security, situations where dynamically assigned addresses are used force the use of a group pre-shared key which creates vulnerability to man-in-the-middle attack). If this second solution is adopted, section 2.3 in the security spec also needs a corresponding change (first two sentences of page 10). paul
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