full-disclosure - New vulnerabilities in ADSL modem Callisto 821+

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Message-ID: <001101cc256b$4d9dd720$9b7a6fd5@ml>
Date: Wed, 8 Jun 2011 02:32:20 +0300
From: "MustLive" <mustlive@...security.com.ua>
To: <submissions@...ketstormsecurity.org>, <full-disclosure@...ts.grok.org.uk>
Subject: New vulnerabilities in ADSL modem Callisto 821+

Hello list!

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

These are Cross-Site Request Forgery and Cross-Site Scripting
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 
or XSS attack.

CSRF (WASC-09):

This vulnerability allows to set name for DNS relay local LAN database. This 
DB will be working only if its name is set (i.e. it's possible to deactivate 
it if to set empty value).

http://websecurity.com.ua/uploads/2011/Callisto%20821+%20CSRF12.html

In section Create new DNS relay local LAN database entry 
(http://192.168.1.1/configuration/create_landb_host.html) via CSRF it's 
possible to add, edit and delete hosts in this DB.

XSS (WASC-08):

In above-mentioned form there are 3 persistent XSS vulnerabilities.

http://websecurity.com.ua/uploads/2011/Callisto%20821+%20XSS17.html

In this case the code will be executed immediately, and also at visiting of 
page http://192.168.1.1/configuration/dns_relay_landb.html.

http://websecurity.com.ua/uploads/2011/Callisto%20821+%20XSS18.html

In this case the code will be executed immediately, and also at visiting of 
pages http://192.168.1.1/system/events.html and 
http://192.168.1.1/shared/event_log_selection.html.

http://websecurity.com.ua/uploads/2011/Callisto%20821+%20XSS19.html

In this case the code will be executed immediately, and also at visiting of 
pages http://192.168.1.1/system/events.html and 
http://192.168.1.1/shared/event_log_selection.html.

In section Create new DNS relay local LAN database entry 
(http://192.168.1.1/configuration/create_landb_host.html) there are 
persistent XSS vulnerabilities in all text fields and some hidden fields.

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

2011.04.14 - informed Ukrtelecom about multiple vulnerabilities in modems,
which they give (sell) to their clients.
2011.06.03 - disclosed at my site.
2011.06.04 - informed developers (Iskratel).

I mentioned about these vulnerabilities at my site 
(http://websecurity.com.ua/5193/).

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

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