Re: [Slim] Alissa Cooper's No Objection on draft-ietf-slim-negotiating-human-language-22: (with COMMENT)
Randall Gellens <rg+ietf@randy.pensive.org> Tue, 09 January 2018 20:08 UTC
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Date: Tue, 09 Jan 2018 12:08:05 -0800
To: Alissa Cooper <alissa@cooperw.in>, The IESG <iesg@ietf.org>
From: Randall Gellens <rg+ietf@randy.pensive.org>
Cc: draft-ietf-slim-negotiating-human-language@ietf.org, slim-chairs@ietf.org, bernard.aboba@gmail.com, slim@ietf.org
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Subject: Re: [Slim] Alissa Cooper's No Objection on draft-ietf-slim-negotiating-human-language-22: (with COMMENT)
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Hi Alissa, Good point. I can reword the Security Considerations section to read: The Security Considerations of BCP 47 [RFC5646] apply here. An attacker with the ability to modify signaling could prevent a call from succeeding by altering any of several crucial elements, including the 'hlang-send' or 'hlang-recv' values. RFC 5069 [RFC5069] discusses such threats. Use of TLS or IPSec can protect against such threats. Emergency calls are of particular concern; RFC 6881 [RFC6881], which is specific to emergency calls, mandates use of TLS or IPSec (in ED-57/SP-30). At 10:18 AM -0800 1/9/18, Alissa Cooper wrote: > Alissa Cooper has entered the following ballot position for > draft-ietf-slim-negotiating-human-language-22: No Objection > > When responding, please keep the subject line intact and reply to all > email addresses included in the To and CC lines. (Feel free to cut this > introductory paragraph, however.) > > > Please refer to https://www.ietf.org/iesg/statement/discuss-criteria.html > for more information about IESG DISCUSS and COMMENT positions. > > > The document, along with other ballot positions, can be found here: > https://datatracker.ietf.org/doc/draft-ietf-slim-negotiating-human-language/ > > > > ---------------------------------------------------------------------- > COMMENT: > ---------------------------------------------------------------------- > > == Section 7 == > > "In > addition, if the 'hlang-send' or 'hlang-recv' values are altered or > deleted en route, the session could fail or languages > incomprehensible to the caller could be selected; however, this is > also a risk if any SDP parameters are modified en route." > > Given that one of the primary use cases for the attributes defined > here is for > emergency calling, it seems worthwhile to call out the new specific > threat that > these attributes enable in that case, namely the targeted > manipulation/forgery > of the language attributes for the purposes of denying emergency > services to a > caller. This general class of attacks is contemplated in Section 5.2.2 of RFC > 5069, although there may be a better reference to cite here for what to do if > you don't want your emergency calls subject to that kind of attack (I can't > recall another document off the top of my head). > > == Section 8 == > > This seems weak for not including some words to indicate what to do > to mitigate > the risks of exposing this information. -- Randall Gellens Opinions are personal; facts are suspect; I speak for myself only -------------- Randomly selected tag: --------------- In my country, we believe (and rightly so) that mindless superstition and meaningless ritual are what separate us from the animals. --'Latka Gravis' on _Taxi_
- [Slim] Alissa Cooper's No Objection on draft-ietf… Alissa Cooper
- Re: [Slim] Alissa Cooper's No Objection on draft-… Randall Gellens
- Re: [Slim] Alissa Cooper's No Objection on draft-… Alissa Cooper
- Re: [Slim] Alissa Cooper's No Objection on draft-… Paul Kyzivat
- Re: [Slim] Alissa Cooper's No Objection on draft-… Randall Gellens
- Re: [Slim] Alissa Cooper's No Objection on draft-… Paul Kyzivat
- Re: [Slim] Alissa Cooper's No Objection on draft-… Randall Gellens