-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2020.4104
         Cisco Expressway Software Unauthorized Access Information
                         Disclosure Vulnerability
                             19 November 2020

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

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Cisco Expressway Software
Publisher:         Cisco Systems
Operating System:  Cisco
Impact/Access:     Unauthorised Access -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2020-3482  

Original Bulletin: 
   https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-Expressway-8J3yZ7hV

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

Cisco Expressway Software Unauthorized Access Information Disclosure
Vulnerability

Priority:        Medium
Advisory ID:     cisco-sa-Expressway-8J3yZ7hV
First Published: 2020 November 18 16:00 GMT
Version 1.0:     Final
Workarounds:     No workarounds available
Cisco Bug IDs:   CSCvt83751
CVE Names:       CVE-2020-3482
CWEs:            CWE-284

CVSS Score:
6.5  AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:X/RL:X/RC:X

Summary

  o A vulnerability in the Traversal Using Relays around NAT (TURN) server
    component of Cisco Expressway software could allow an unauthenticated,
    remote attacker to bypass security controls and send network traffic to
    restricted destinations.

    The vulnerability is due to improper validation of specific connection
    information by the TURN server within the affected software. An attacker
    could exploit this issue by sending specially crafted network traffic to
    the affected software. A successful exploit could allow the attacker to
    send traffic through the affected software to destinations beyond the
    application, possibly allowing the attacker to gain unauthorized network
    access.

    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:
    https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/
    cisco-sa-Expressway-8J3yZ7hV

Affected Products

  o Vulnerable Products

    At the time of publication, this vulnerability affected Cisco Expressway
    Series and Cisco TelePresence Video Communication Server (VCS) running a
    software release earlier than Release X12.6.3.

    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.

Workarounds

  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
    providers.

    Fixed Releases

    At the time of publication, Cisco Expressway and Cisco TelePresence Release
    X12.6.3 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.

Source

  o Cisco would like to thank Christian Mehlmauer of WienCERT-IT-Security in
    the City of Vienna for reporting this vulnerability.

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.

URL

  o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/
    cisco-sa-Expressway-8J3yZ7hV

Revision History

  o +----------+---------------------------+----------+--------+--------------+
    | Version  |        Description        | Section  | Status |     Date     |
    +----------+---------------------------+----------+--------+--------------+
    | 1.0      | Initial public release.   | -        | Final  | 2020-NOV-18  |
    +----------+---------------------------+----------+--------+--------------+

- --------------------------END INCLUDED TEXT--------------------

You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.

NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members.  As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.

NOTE: This is only the original release of the security bulletin.  It may
not be updated when updates to the original are made.  If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.

Contact information for the authors of the original document is included
in the Security Bulletin above.  If you have any questions or need further
information, please contact them directly.

Previous advisories and external security bulletins can be retrieved from:

        https://www.auscert.org.au/bulletins/

===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967
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=6fHC
-----END PGP SIGNATURE-----