ESB-2017.2694 - [Cisco] Cisco Spark Hybrid Calendar Service: Access confidential data - Remote/unauthenticated 2017-10-25

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2017.2694
 Cisco Spark Hybrid Calendar Service Information Disclosure Vulnerability
                              25 October 2017

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

Product:           Cisco Spark Hybrid Calendar Service
Publisher:         Cisco Systems
Operating System:  Cisco
Impact/Access:     Access Confidential Data -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-12310  

Original Bulletin: 
   https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171023-spark

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Cisco Spark Hybrid Calendar Service Information Disclosure Vulnerability

Medium

Advisory ID:
cisco-sa-20171023-spark

First Published:
2017 October 23 21:30  GMT
 
Version 1.0:
Final

Workarounds:
 No workarounds available

Cisco Bug IDs:
CSCvg35593
CVE-2017-12310
CWE-200

CVSS Score:
Base 5.9

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N/E:X/RL:X/RC:X
CVE-2017-12310
CWE-200

Summary
  
A vulnerability in the auto discovery phase of Cisco Spark Hybrid
Calendar Service could allow an unauthenticated, remote attacker to
view sensitive information in the unencrypted headers of an HTTP
method request. The attacker could use this information to conduct
additional reconnaissance attacks leading to the disclosure of
sensitive customer data.

The vulnerability exists in the auto discovery phase because an
unencrypted HTTP request is made due to requirements for implementing
the Hybrid Calendar service. An attacker could exploit this
vulnerability by monitoring the unencrypted traffic on the network. An
exploit could allow the attacker to access sensitive customer data
belonging to Office365 users, such as email and calendar events.

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-20171023-spark

Affected Products
 
Vulnerable Products
 
This vulnerability affects Cisco Spark Hybrid Calendar Service. For
information about affected software releases, consult the Cisco bug
ID(s) at the top of this advisory.

Products Confirmed Not Vulnerable
 
No other Cisco products are currently known to be affected by this
vulnerability.

Workarounds
 
There are no workarounds that address this vulnerability.

Fixed Software
 
For information about fixed software releases, consult the Cisco bug
ID(s) at the top of this advisory.

When considering software upgrades, customers are advised to regularly
consult the advisories for Cisco products, which are available from
the Cisco Security Advisories and Alerts 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.

Exploitation and Public Announcements
 
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 
 
This vulnerability was found during resolution of a Cisco TAC support case.

Cisco Security Vulnerability Policy
  
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.

Subscribe to Cisco Security Notifications

Subscribe	 URL
 
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171023-spark

Revision History
  
Version		Description		Section		Status	Date
1.0		Initial public release.			Final	2017-October-23

Legal Disclaimer
 
THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY
KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE
INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS
AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS
DOCUMENT AT ANY TIME.

A standalone copy or paraphrase of the text of this document that
omits the distribution URL is an uncontrolled copy and may lack
important information or contain factual errors. The information in
this document is intended for end users of Cisco products.

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