SEC Consult Vulnerability Lab Security Advisory < 20130404-0 >
=======================================================================
              title: Multiple Vulnerabilities
            product: Censornet Professional v4 (2.1.7)
 vulnerable version: 2.1.7
      fixed version:
             impact: high
           homepage: http://www.censornet.com/
              found: 2013-02-06
                 by: M. Heinzl
                     SEC Consult Vulnerability Lab
                     https://www.sec-consult.com
=======================================================================

Vendor description:
-------------------
CensorNet Ltd is an established player in the Internet Security market with a
focus on web content and e-mail content management.

With a broad portfolio of products to suit customers, channel partners and
service providers, CensorNet strives to provide flexible and feature-packed
products that are affordable to all types of organization. CensorNet products
allow stakeholders to quickly and easily implement an Acceptable Usage Policy
for Internet access, helping them to improve productivity, increase security,
comply with regulations and reduce administrative burden. CensorNet Ltd is
headquartered in the United Kingdom and sells globally via an established
channel partner network.

Source: http://www.censornet.com/en/about


Vulnerability overview/description:
-----------------------------------
Censornet Professional v4 suffers from multiple Cross-Site Scripting and SQL
Injection vulnerabilities which can be exploited by an authenticated attacker.


Proof of concepts:
-----------------
Detailed proof of concept URLs and exploits have been removed from this
advisory as no vendor patch is available.


1) Reflective Cross-Site Scripting Vulnerability

When doing a "Site Lookup" through "Filters > Content classified (Site
Lookup)", JavaScript code can be inserted into the parameter "lookup_url":

[...]

2) Multiple Stored Cross-Site Scripting Vulnerabilities

Multiple parameters of the Censornet Professional v4 appliaction are prone to
stored Cross-Site Scripting attacks. Amongst others, the configuration of the
"Parent Proxy Settings" ("System > Configuration > Parent Proxy Settings"),
contain many vulnerable parameters:
- parentproxyaddress
- parentproxyport
- parentproxyusername
- parentproxypassword
- parentproxyaddressssl
- parentproxyportssl
- parentproxyusernamessl
- parentproxypasswordssl

Request:

[...]

The sample applies to the parameters of "System Alerts" ("Configuration >
System Alerts"):
- load
- ram
- disk

Request:

[...]

3) Multiple SQL Injection Vulnerabilities

Multiple SQL injection vulnerabilities exist within the Censornet Professional
v4 product. Malicious authenticated users can exploit these flaws to
manipulate the queries sent to the PostgreSQL database.

When creating a new report ("Reports > New Custom Report"), the following
parameters are vulnerable:
- report_items
- report_name
- date_range
- username_comparison
- username_specificvalue
- usergroups_comparison
- usergroups_specificvalue
- workstation_comparison
- workstation_specificvalue
- workstationgroups_comparison
- workstationgroups_specificvalue
- url_comparison
- url_specificvalue
- policy_comparison
- policy_specificvalue
- ...

"Reports > View Custom Report":
- predicate
- report_name
- table
- ...

"Reports > Manage Custom Reports":
- filter
- ...

"Filters > Custom URL Module > Categories":
- newcategory
- ...

"Policies > New Policy":
- policy_name
- policy_description
- colorpicker
- access_level
- conflicts
- block_nocat
- time_quota
- ...

"Objects > New User":
- id
- ...

"Objects > New Computer":
- new_workstation_name
- new_workstation_addr
- group
- ...

"Objects > New Administrator":
- module_items
- new_user_name
- ...

"Objects > New Manager":
- group_items
- new_manager_email
- new_manager_period
- ...


Vulnerable / tested versions:
-----------------------------
Censornet Professional v4 (2.1.7)


Vendor contact timeline:
------------------------
2013-02-12: Contacting vendor through info@censornet.com
2013-02-20: Contacting vendor again through info@censornet.com,
            sales@censornet.com, support@censornet.com and support formular
            (http://www.censornet.com/en/support/ticket) since no reply was
            received so far
2013-02-27: Informing vendor about the release of the advisory on 2013-04-03.
2013-04-04: No further response from vendor. Advisory published according to
            the SEC Consult's responsible disclosure policy.


Solution:
---------
None


Workaround:
-----------
Restrict access to trusted users only.


Advisory URL:
-------------
https://www.sec-consult.com/en/Vulnerability-Lab/Advisories.htm


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EOF M. Heinzl / @2013