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Date: Wed, 29 Apr 2015 18:33:43 -0400 (EDT)
From: cve-assign@...re.org
To: admin@...bh.am
Cc: cve-assign@...re.org, oss-security@...ts.openwall.com
Subject: Re: CVE request - TelescopeJS Information Leakage: User BCrypt password hash post-authentication

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> TelescopeJS leaks the users BCrypt password hash in incoming websocket
> messages once the user has authenticated. Due to the fact that TelescopeJS
> is an expressjs web application, it uses the model of storing session
> information in the browsers localStorage.
> 
> This means that if an attacker is able to find a single cross-site
> scripting flaw in MeteorJS, they would then be able to extract the users
> password hash from incoming websocket messages. This hash could then be
> cracked.
> 
> The bcrypt hash is sent in incoming websocket messages every time the user
> object is needed by the application.
> 
> This vulnerability affects TelescopeJS installations below version 0.15.
> 
> A discussion about these issues can be found here:
> https://github.com/TelescopeJS/Telescope/issues/838
> 
> The commits leading to the fix for this flaw can be found here:
> 
> https://github.com/TelescopeJS/Telescope/blob/dd6130637c00a8166cc4647153b441cb32b7ca61/lib/publications.js#L29-L31

In this case, it appears that a primary developer of TelescopeJS (the
person at the top of the GitHub contributors list) is indicating that
the previous behavior was unsafe:

  https://github.com/TelescopeJS/Telescope/issues/838#issuecomment-85762182

Use CVE-2015-3454.

(In other cases, it is possible that an issue exploitable only after
"find a single cross-site scripting flaw" would not have a CVE ID
assigned.)

Also, as suggested by the
https://github.com/TelescopeJS/Telescope/issues/838#issuecomment-85734879
comment, lack of the HTTPOnly flag is not relevant to this product. There
is no CVE ID for that HTTPOnly issue.

- -- 
CVE assignment team, MITRE CVE Numbering Authority
M/S M300
202 Burlington Road, Bedford, MA 01730 USA
[ PGP key available through http://cve.mitre.org/cve/request_id.html ]
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