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List:       full-disclosure
Subject:    [Full-disclosure] CSRF vulnerabilities in ADSL modem Callisto 821+
From:       "MustLive" <mustlive () websecurity ! com ! ua>
Date:       2011-05-31 15:36:31
Message-ID: 00fd01cc1fa8$a7d7db50$9b7a6fd5 () ml
[Download RAW message or body]

Hello list!

I want to warn you about security vulnerabilities in ADSL modem Callisto
821+ (SI2000 Callisto821+ Router).

These are Cross-Site Request Forgery vulnerabilities. In April I've already 
drew attention of Ukrtelecom's representative (and this modem was bough at 
Ukrtelecom) about multiple vulnerabilities in this model of Callisto modems 
(and other models also could be affected).

SecurityVulns ID: 11700.

-------------------------
Affected products:
-------------------------

Vulnerable is the next model: SI2000 Callisto821+ Router: X7821 Annex A
v1.0.0.0 / Argon 4x1 CSP v1.0 (ISOS 9.0) [4.3.4-5.1]. This model with other
firmware and also other models of Callisto also must be vulnerable.

----------
Details:
----------

These attacks should be conducted on modem owner, which is logged into 
control panel. Taking into account that it's unlikely to catch him in this 
state, then it's possible to use before-mentioned vulnerabilities 
(http://websecurity.com.ua/5161/) for conducting of remote login (for 
logining him into control panel). After that it's possible to conduct CSRF 
attack.

CSRF (WASC-09):

This vulnerability allows to open remote (external) access to admin panel. 
By default access is possible only from local computer (and LAN), but at 
turning this option on it's possible to enter into admin panel from 
Internet. At that the time is set on which remote access is opened.

http://websecurity.com.ua/uploads/2011/Callisto%20821+%20CSRF3.html

This vulnerability allows to conduct modem restart and reset to factory 
default settings.

http://websecurity.com.ua/uploads/2011/Callisto%20821+%20CSRF4.html

------------
Timeline:
------------

2011.04.14 - informed Ukrtelecom about multiple vulnerabilities in modems,
which they give (sell) to their clients.
2011.05.27 - disclosed at my site.
2011.05.27 - informed developers (Iskratel).

I mentioned about these vulnerabilities at my site 
(http://websecurity.com.ua/5172/).

Best wishes & regards,
MustLive
Administrator of Websecurity web site
http://websecurity.com.ua 


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