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AUSCERT External Security Bulletin Redistribution
ESB-2017.2243
Cisco Meeting Server Guest Hyperlink Information Disclosure Vulnerability
7 September 2017
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AusCERT Security Bulletin Summary
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Product: Cisco Meeting Server
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Access Confidential Data -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2017-12224
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170906-cms
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Cisco Meeting Server Guest Hyperlink Information Disclosure Vulnerability
Medium
Advisory ID: cisco-sa-20170906-cms
First Published: 2017 September 6 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs:
CSCve20873
CVSS Score:
Base 6.5
Base 6.5 CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:X/RL:X/RC:X
CVE-2017-12224
CWE-200
Summary
A vulnerability in the ability for guest users to join meetings via a
hyperlink with Cisco Meeting Server could allow an authenticated, remote
attacker to enter a meeting with a hyperlink URL, even though access
should be
denied.
The vulnerability is due to the incorrect implementation of the configuration
setting Guest access via hyperlinks, which should allow the administrative
user to prevent guest users from using hyperlinks to connect to meetings. An
attacker could exploit this vulnerability by using a crafted hyperlink to
connect to a meeting. An exploit could allow the attacker to connect directly
to the meeting with a hyperlink, even though access should be denied. The
attacker would still require a valid hyperlink and encoded secret identifier
to be connected.
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-20170906-cms
Affected Products
Vulnerable Products
This vulnerability affects Cisco Meeting Server. 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.
URL
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170906-cms
Revision History
Version Description Section Status Date
1.0 Initial public release. -- Final 2017-September-06
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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