The privacy matter is already mentioned. Despite your many messages to this WG and others about the so called ABC attack, I do not believe it warrants treatment in this document or others. And your continued proposals to have it included in documents have not gotten support.
On Fri, Dec 8, 2017 at 2:46 PM, Denis <denis.i...@free.fr> wrote: > RFC 3552 (Guidelines for Writing RFC Text on Security Considerations) > states: > > All RFCs are required by RFC 2223 to contain a Security > Considerations section. The purpose of this is both to encourage > document authors to consider security in their designs and to inform > the reader of relevant security issues. This memo is intended to > provide guidance to RFC authors in service of both ends. > > Section 5 (Writing Security Considerations Sections) of RFC 3552 states: > > While it is not a requirement that any given protocol or system be > immune to all forms of attack, it is still necessary for authors to > consider as many forms as possible. Part of the purpose of the > Security Considerations section is to explain what attacks are out of > scope and what countermeasures can be applied to defend against them > > There should be a clear description of the kinds of threats on the > described protocol or technology. > > It is important to mention the threat related to collusion attacks. A > different wording could be used, > but the threat should be mentioned one way or another. > RFC 6973 (Privacy Considerations for Internet Protocols) intends to > provide a similar set of guidelines > for considering privacy in protocol design. It is important to mention a > current threat related to privacy. A different wording could be used, > e.g. using the word "surveillance" as mentioned in 5.1.1 : "Surveillance > is the observation or monitoring > of an individual’s communications or activities", but the threat should be > mentioned one way or another. Denis > > I believe the text would detract from the document. > ------------------------------ > *From:* OAuth <oauth-boun...@ietf.org> <oauth-boun...@ietf.org> on behalf > of Brian Campbell <bcampb...@pingidentity.com> > <bcampb...@pingidentity.com> > *Sent:* Friday, December 8, 2017 3:47:32 PM > *To:* Denis > *Cc:* oauth > *Subject:* Re: [OAUTH-WG] I-D Action: draft-ietf-oauth-token- > exchange-10.txt > > As an individual, I do not believe that the proposed text should be > incorporated into the draft. > > As one of the document editors, my responsibility is for the document to > be of reasonable quality and to reflect the rough consensus of this Working > Group. So I should ask the list more explicitly - are there other WG > remembers who are in favor of the proposed text here (the text would have > to be fixed up some too)? > > On Fri, Dec 1, 2017 at 11:12 AM, Denis <denis.i...@free.fr> wrote: > >> Comments on draft-ietf-oauth-token-exchange-10 >> >> I propose the following rephrasing for sections 6 and 7: >> >> 6 . Security Considerations >> >> All of the normal security issues that are discussed in [JWT],especially >> in relationship to comparing URIs >> and dealing with unrecognized values, also apply here. In addition, both >> delegation and impersonation introduce >> unique security issues. Any time one user receives a token, the potential >> for abuse is a concern, >> since that user might be willing to collude with another user so that >> other user could use the token. >> >> Techniques like the binding of an access token to a TLS channel described >> elsewhere are ineffective since >> the legitimate user would be able to perform all the cryptographic >> computations that the other user would need >> to demonstrate the ownership of the token. The use of the "scp" claim is >> suggested to mitigate potential for >> such abuse, as it restricts the contexts in which the token can be >> exercised. If the issued access token scope >> allows to unambiguously identify the user, then that user is likely to be >> reluctant to collude with another user. >> However, if the issued access token scope only indicates that the user is >> over 18, then there is no risk >> for the original user to be discovered and in such a context a collusion >> may easily take place. >> This document does not specify techniques to prevent such a collusion to >> be successful. >> >> 7 . Privacy Considerations >> >> Tokens typically carry personal information and their usage in Token >> Exchange may reveal details of the target services >> being accessed. The resource and the audience parameters allow >> authorization servers to know where the issued access token >> will be used. This may be a privacy concern for some users. This >> document does not specify techniques to prevent >> authorization servers to know where the access tokens they issue will be >> used. >> Denis >> >> A New Internet-Draft is available from the on-line Internet-Drafts >> directories. >> This draft is a work item of the Web Authorization Protocol WG of the IETF. >> >> Title : OAuth 2.0 Token Exchange >> Authors : Michael B. Jones >> Anthony Nadalin >> Brian Campbell >> John Bradley >> Chuck Mortimore >> Filename : draft-ietf-oauth-token-exchange-10.txt >> Pages : 32 >> Date : 2017-11-30 >> >> Abstract: >> This specification defines a protocol for an HTTP- and JSON- based >> Security Token Service (STS) by defining how to request and obtain >> security tokens from OAuth 2.0 authorization servers, including >> security tokens employing impersonation and delegation. >> >> >> The IETF datatracker status page for this draft >> is:https://datatracker.ietf.org/doc/draft-ietf-oauth-token-exchange/ >> >> There are also htmlized versions available >> at:https://tools.ietf.org/html/draft-ietf-oauth-token-exchange-10https://datatracker.ietf.org/doc/html/draft-ietf-oauth-token-exchange-10 >> >> A diff from the previous version is available >> at:https://www.ietf.org/rfcdiff?url2=draft-ietf-oauth-token-exchange-10 >> >> >> Please note that it may take a couple of minutes from the time of submission >> until the htmlized version and diff are available at tools.ietf.org. >> >> Internet-Drafts are also available by anonymous FTP >> at:ftp://ftp.ietf.org/internet-drafts/ >> >> _______________________________________________ >> OAuth mailing listOAuth@ietf.orghttps://www.ietf.org/mailman/listinfo/oauth >> >> >> >> _______________________________________________ >> OAuth mailing list >> OAuth@ietf.org >> https://www.ietf.org/mailman/listinfo/oauth >> >> > > *CONFIDENTIALITY NOTICE: This email may contain confidential and > privileged material for the sole use of the intended recipient(s). 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