Operating System:

[Cisco]

Published:

21 January 2021

Protect yourself against future threats.

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

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

                               ESB-2021.0251
            Cisco Umbrella Dashboard Packet Flood Vulnerability
                              21 January 2021

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

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

Product:           Cisco Umbrella Dashboard
Publisher:         Cisco Systems
Operating System:  Cisco
Impact/Access:     Reduced Security -- Remote/Unauthenticated
Resolution:        None
CVE Names:         CVE-2021-1350  

Original Bulletin: 
   https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-umb-dos-dgKzDEBP

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

Cisco Umbrella Dashboard Packet Flood Vulnerability

Priority:        Medium
Advisory ID:     cisco-sa-umb-dos-dgKzDEBP
First Published: 2021 January 20 16:00 GMT
Version 1.0:     Final
Workarounds:     No workarounds available
Cisco Bug IDs:   CSCvw61612
CVE Names:       CVE-2021-1350
CWEs:            CWE-770

Summary

  o A vulnerability in the web UI of Cisco Umbrella could allow an
    unauthenticated, remote attacker to negatively affect the performance of
    this service.

    The vulnerability exists due to insufficient rate limiting controls in the
    web UI. An attacker could exploit this vulnerability by sending crafted
    HTTPS packets at a high and sustained rate. A successful exploit could
    allow the attacker to negatively affect the performance of the web UI.

    Cisco has addressed 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-umb-dos-dgKzDEBP

Affected Products

  o Vulnerable Products

    This vulnerability affects Cisco Umbrella, which is cloud based. No user
    action is required.
   
    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 Cisco has addressed this vulnerability in Cisco Umbrella Dashboard, which
    is cloud based. No user action is required.

    Customers who need additional information are advised to contact Cisco
    Umbrella Support at umbrella-support@cisco.com or their contracted
    maintenance providers.

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 Abhinav Khanna of eSec Forte Technologies 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-umb-dos-dgKzDEBP

Revision History

  o +----------+---------------------------+----------+--------+--------------+
    | Version  |        Description        | Section  | Status |     Date     |
    +----------+---------------------------+----------+--------+--------------+
    | 1.0      | Initial public release.   | -        | Final  | 2021-JAN-20  |
    +----------+---------------------------+----------+--------+--------------+

- --------------------------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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=tKD5
-----END PGP SIGNATURE-----