Re: [secdir] SECDIR Review of draft-zeilenga-ldap-dontusecopy-08
Alexey Melnikov <alexey.melnikov@isode.com> Mon, 18 October 2010 06:51 UTC
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Date: Sun, 17 Oct 2010 07:20:54 +0100
From: Alexey Melnikov <alexey.melnikov@isode.com>
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To: Phillip Hallam-Baker <hallam@gmail.com>
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Cc: Kurt.Zeilenga@Isode.COM, iesg@ietf.org, secdir@ietf.org
Subject: Re: [secdir] SECDIR Review of draft-zeilenga-ldap-dontusecopy-08
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Phillip Hallam-Baker wrote: > I have 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. > > This document describes what is essentially a 'send original, not > cached flag' for LDAP. > > Only security issue I can see here is that the following does not give > the purpose very clearly. > >4. Security Considerations > > This control is intended to be provided where providing service using > copied information might lead to unexpected application behavior. > Designers of directory applications should consider where it is > appropriate for clients to provide this control. Designers should > consider whether use of copied information, in particular security and > policy information, may result insecure behavior. > > > I would suggest the following instead > >4. Security Considerations > > This control is intended to be provided where providing service using > copied information might lead to unexpected application behavior. > > Use of the Don't Use Copy control may permit an attacker to perform > or amplify a Denial of Service attack by causing additional server > resources to be employed. > > LDAP is frequently used for storage and distribution of security > sensitive information, including access control and security policy > information. Failure to use the Don't Use Copy control may thus > permit an attacker to gain unauthorized access by allowing reliance > on stale data. > > The meaning is unchanged, but the additional context might help the > reader. I like your text better, as it is much more explicit about threats.
- [secdir] SECDIR Review of draft-zeilenga-ldap-don… Phillip Hallam-Baker
- Re: [secdir] SECDIR Review of draft-zeilenga-ldap… Alexey Melnikov