Re: [rtcweb] WGLC Review of draft-ietf-ice-rfc5245bis-12 - Security Considerations Pull Request

Christer Holmberg <christer.holmberg@ericsson.com> Wed, 18 October 2017 12:37 UTC

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From: Christer Holmberg <christer.holmberg@ericsson.com>
To: Harald Alvestrand <harald@alvestrand.no>, "ice@ietf.org" <ice@ietf.org>
CC: "rtcweb@ietf.org" <rtcweb@ietf.org>
Thread-Topic: [rtcweb] WGLC Review of draft-ietf-ice-rfc5245bis-12 - Security Considerations Pull Request
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Date: Wed, 18 Oct 2017 12:37:16 +0000
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Subject: Re: [rtcweb] WGLC Review of draft-ietf-ice-rfc5245bis-12 - Security Considerations Pull Request
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Hi,

...

>> 
>>> * Security considerations should mention the problem that ICE reveals
>>> addresses that might otherwise remain hidden, and that this is a
>>>privacy
>>> concern.
>> 
>> I would be glad if someone could provide text for that, to make sure we
>> get it right.
>
>The paragraph I suggested in the PDF was:
>
>³The process of probing for candidates reveals the source addresses of
>the client and its peer to any on-network listening attacker, and the
>process of exchanging candidates reveals the addresses to any attacker
>that is able to see the negotiation. Some addresses, such as the server
>reflexive addresses gathered through the local interface of VPN users,
>may be sensitive information. If these potential attacks can¹t be
>mitigated, the implementation may want to institute controls for which
>addresses are revealed to the negotiation and/or probing process. Such
>controls need to be specified as part of the ICE usage.²
>
>Of course, that's only my suggestion.

Pull request created:

https://github.com/ice-wg/rfc5245bis/pull/49


Regards,

Christer