Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256
===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2017.2694
Cisco Spark Hybrid Calendar Service Information Disclosure Vulnerability
25 October 2017
===========================================================================
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
- --------------------------BEGIN INCLUDED TEXT--------------------
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.
- --------------------------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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=v6qj
-----END PGP SIGNATURE-----