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             AUSCERT External Security Bulletin Redistribution

         Cisco Webex Meetings and Cisco Webex Meetings Server HTML
                          Injection Vulnerability
                               16 July 2020


        AusCERT Security Bulletin Summary

Product:           WebEx
                   Webex Server
Publisher:         Cisco Systems
Operating System:  Cisco
Impact/Access:     Provide Misleading Information -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2020-3345  

Original Bulletin: 

- --------------------------BEGIN INCLUDED TEXT--------------------

Cisco Webex Meetings and Cisco Webex Meetings Server HTML Injection

Priority:        Medium

Advisory ID:     cisco-sa-webex-html-BJ4Y9tX

First Published: 2020 July 15 16:00 GMT

Version 1.0:     Final

Workarounds:     No workarounds available
Cisco Bug IDs:   CSCvt75607 CSCvt75616 CSCvu00484


CVSS Score:


  o A vulnerability in certain web pages of Cisco Webex Meetings and Cisco
    Webex Meetings Server could allow an unauthenticated, remote attacker to
    modify a web page in the context of a browser.

    The vulnerability is due to improper checks on parameter values within
    affected pages. An attacker could exploit this vulnerability by persuading
    a user to follow a crafted link that is designed to pass HTML code into an
    affected parameter. A successful exploit could allow the attacker to alter
    the contents of a web page to redirect the user to potentially malicious
    web sites, or the attacker could leverage this vulnerability to conduct
    further client-side attacks.

    Cisco has released software updates that address this vulnerability. There
    are no workarounds that address this vulnerability.

    This advisory is available at the following link:

Affected Products

  o Vulnerable Products

    At the time of publication, this vulnerability affected Cisco Webex
    Meetings releases earlier than Release 40.6.0 and Cisco Webex Meetings
    Server releases earlier than Release 4.0 MR3.

    See the Details section in the bug ID(s) at the top of this advisory for
    the most complete and current information.

    Products Confirmed Not Vulnerable

    Only products listed in the Vulnerable Products section of this advisory
    are known to be affected by this vulnerability.


  o There are no workarounds that address this vulnerability.

Fixed Software

  o When considering software upgrades , customers are advised to regularly
    consult the advisories for Cisco products, which are available from the
    Cisco Security Advisories page , to determine exposure and a complete
    upgrade solution.

    In all cases, customers should ensure that the devices to be upgraded
    contain sufficient memory and confirm that current hardware and software
    configurations will continue to be supported properly by the new release.
    If the information is not clear, customers are advised to contact the Cisco
    Technical Assistance Center (TAC) or their contracted maintenance

    Fixed Releases

    At the time of publication, Cisco Webex Meetings releases 40.6.0 and later
    and Cisco Webex Meetings Server releases 4.0 MR3 and later contained the
    fix for this vulnerability.

    See the Details section in the bug ID(s) at the top of this advisory for
    the most complete and current information.

Exploitation and Public Announcements

  o The Cisco Product Security Incident Response Team (PSIRT) is not aware of
    any public announcements or malicious use of the vulnerability that is
    described in this advisory.


  o Cisco would like to thank Gabriele Pippi of Certego IRT for reporting this
    vulnerability. Cisco would like to thank the security researcher Prasenjit
    Kanti Paul for independently reporting this vulnerability. Cisco would also
    like to thank Shahriar Yazdipour for independently reporting this

Cisco Security Vulnerability Policy

  o To learn about Cisco security vulnerability disclosure policies and
    publications, see the Security Vulnerability Policy . This document also
    contains instructions for obtaining fixed software and receiving security
    vulnerability information from Cisco.


  o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/

Revision History

  o +----------+---------------------------+----------+--------+--------------+
    | Version  |        Description        | Section  | Status |     Date     |
    | 1.0      | Initial public release.   | -        | Final  | 2020-JUL-15  |

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