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Advisory ID:               SYSS-2018-024
Product:                   Collaboration Compliance and Quality Management Platform
Manufacturer:              Verint Verba
Affected Version(s):       <= 9.1.1.5482
Tested Version(s):         9.1.1.5482
Vulnerability Type:        Improper Access Control (CWE-284)
Risk Level:                Medium
Solution Status:           Fixed
Manufacturer Notification: 2018-08-29
Solution Date:             2018-08-31
Public Disclosure:         2018-10-02
CVE Reference:             CVE-2018-17872
Author of Advisory:        Tobias Huppertz, SySS GmbH

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Overview:

Collaboration Compliance and Quality Management Platform is a product
to record and play calls with VoIP-telephons including Skype, messages
and video. The permission management works with different roles and
groups. So member can just play their own calls and investigators can
also play calls of other users.

The manufacturer describes the product as follows (see [1]):

"Verint Essential Workforce Optimization offers advanced automation to
get the most from your workforce. Our software and services can
enhance the efficiency of your employees and processes, and enable you
to share workforce intelligence in real-time across your
business. Mid-market contact centers, back-office operations, branch
operations and financial trading rooms can rely on Verint Essential
Workforce Optimization to capture and store interactions, heighten
quality, ensure compliance and help manage the availability and
performance of employees in targeted areas of their businesses."

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Vulnerability Details:

At the page "Group Configuration - Assign Users" a list of users are
shown which are in this group. Every user can also be a member of the
groups Member, Supervisor, Investigator, Administrator and Manager,
but Investigator is diabled. By modifing the html source code with the
developer tools (Internet Explorer 11: key F12) it is possible to
enable this checkbox, set it to true and save the new
configuration. At this moment the user gets also a new tab named
workflow to see four-eyes-requests.

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Proof of Concept (PoC):

Go to "Group Configuration - Assign Users", enable the Investigator
checkbox with the developer tools, activate the checkbox and press
save.

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Solution:

Install the new version, which was published by the vendor [2].

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Disclosure Timeline:

2018-08-16: Vulnerability discovered
2018-08-30: Vulnerability reported to manufacturer
2018-08-30: Vulnerability confirmed by manufacturer
2018-08-31: Update released by manufacturer
2018-10-01: CVE number assigned
2018-10-02: Public disclosure of vulnerability

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References:

[1] Collaboration Compliance and Quality Management Platform
    https://www.verba.com/solutions/compliance-recording-collaboration/#Skype-for-Business
[2] Verba 9.2 Release Notes (build 9.2.2.5549) - RI-016912
    https://releases.verba.com/?v=9.2
[3] SySS Security Advisory SYSS-2018-024
    https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2018-024.txt
[4] SySS Responsible Disclosure Policy
    https://www.syss.de/en/news/responsible-disclosure-policy/

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Credits:

This security vulnerability was found by Tobias Huppertz of SySS GmbH.

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Disclaimer:

The information provided in this security advisory is provided "as is"
and without warranty of any kind. Details of this security advisory
may be updated in order to provide as accurate information as
possible. The latest version of this security advisory is available on
the SySS Web site.

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Copyright:

Creative Commons - Attribution (by) - Version 3.0
URL: http://creativecommons.org/licenses/by/3.0/deed.en

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