Hash: SHA256

             AUSCERT External Security Bulletin Redistribution

             Cisco Umbrella Cross-Site Scripting Vulnerability
                                9 May 2019


        AusCERT Security Bulletin Summary

Product:           Cisco Umbrella
Publisher:         Cisco Systems
Operating System:  Cisco
Impact/Access:     Cross-site Scripting -- Remote with User Interaction
Resolution:        None
CVE Names:         CVE-2019-1792  

Original Bulletin: 

Revision History:  May    9 2019: No action is required by the customer
                   April 18 2019: Initial Release

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

Cisco Umbrella Cross-Site Scripting Vulnerability

Priority:        Medium

Advisory ID:     cisco-sa-20190417-umbrella-xss

First Published: 2019 April 17 16:00 GMT

Last Updated:    2019 May 8 15:46 GMT

Version 1.1:     Final

Workarounds:     No workarounds available

Cisco Bug IDs:   CSCvo32441



CVSS Score:


  o A vulnerability in the URL block page of Cisco Umbrella could allow an
    unauthenticated, remote attacker to conduct a cross-site scripting (XSS)
    attack against a user in a network protected by Umbrella.

    The vulnerability is due to insufficient validation of input parameters
    passed to that page. An attacker could exploit this vulnerability by
    persuading a user of the interface to click a maliciously crafted link. A
    successful exploit could allow the attacker to execute arbitrary script
    code in the context of the interface or access sensitive browser-based

    There are no workarounds that address this vulnerability.

    This advisory is available at the following link:

Affected Products

  o Vulnerable Products

    This vulnerability affects Cisco Umbrella, which is cloud based. For
    information about affected software releases, consult the Cisco bug ID(s)
    at the top of this advisory.

    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 Cisco Umbrella has proactively performed the necessary actions that address
    the vulnerability described in this advisory. Cisco has determined that
    software updates and/or configuration changes required to fix this
    vulnerability do not require customer actions because these updates and
    changes are applied to Cisco-managed infrastructure. Customers may refer to
    the Help section in the GUI of the cloud service to determine the current
    remediation status or software version.

    Customers are advised to contact the Cisco Technical Assistance Center
    (TAC) or their contracted maintenance providers to help answer any
    questions if necessary.

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 independent security researcher Zachary Swanson
    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.

Action Links for This Advisory

  o Understanding Cross-Site Scripting (XSS) Threat Vectors

Related to This Advisory

  o Understanding Cross-Site Scripting Threat Vectors


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

Revision History

  o +---------+-------------------------+------------+--------+---------------+
    | Version |       Description       |  Section   | Status |     Date      |
    |         | Indicated that Cisco    |            |        |               |
    |         | Umbrella is cloud       | Vulnerable |        |               |
    | 1.1     | based. Noted that no    | Products,  | Final  | 2019-May-08   |
    |         | action is required by   | Fixed      |        |               |
    |         | the customer to address | Software   |        |               |
    |         | this vulnerability.     |            |        |               |
    | 1.0     | Initial public release. | -          | Final  | 2019-April-17 |

- --------------------------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:


Australian Computer Emergency Response Team
The University of Queensland
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.
Comment: http://www.auscert.org.au/render.html?it=1967