Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256
===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2017.1918
Cisco Identity Services Engine Authentication Bypass Vulnerability
3 August 2017
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco Identity Services Engine (ISE)
Publisher: Cisco Systems
Operating System: Cisco
VMware ESX Server
Impact/Access: Administrator Compromise -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2017-6747
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170802-ise
- --------------------------BEGIN INCLUDED TEXT--------------------
Cisco Identity Services Engine Authentication Bypass Vulnerability
High
Advisory ID:
cisco-sa-20170802-ise
First Published:
2017 August 2 16:00 GMT
Version 1.0:
Final
Workarounds:
No workarounds available
Cisco Bug IDs:
CSCvb10995
CVSS Score:
Base 8.1, Temporal 8.1
CVE-2017-6747
CWE-287
Summary
A vulnerability in the authentication module of Cisco Identity Services
Engine (ISE) could allow an unauthenticated, remote attacker to bypass
local authentication.
The vulnerability is due to improper handling of authentication requests
and policy assignment for externally authenticated users. An attacker
could exploit this vulnerability by authenticating with a valid external
user account that matches an internal username and incorrectly receiving
the authorization policy of the internal account. An exploit could allow
the attacker to have Super Admin privileges for the ISE Admin portal.
This vulnerability does not affect endpoints authenticating to the ISE.
Cisco has released software updates that address 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-20170802-ise
Affected Products
Vulnerable Products
The vulnerability affects the following Cisco Identity Services Engine
(ISE) products running Release 1.3, 1.4, 2.0.0, 2.0.1, or 2.1.0.
Release 2.2.x is not affected.
Cisco ISE
Cisco ISE Express
Cisco ISE Virtual Appliance
To determine which release of the software is currently running on a
device, administrators may use the show version command in the device
CLI or navigate to the top right corner and click Settings (gear icon)
> About Identity Service Engine in the Admin portal. The output of
the command in the CLI is similar to the following example:
ServiceEngine115/admin# show version
Cisco Application Deployment Engine OS Release: 2.3
ADE-OS Build Version: 2.3.0.187
ADE-OS System Architecture: x86_64
Copyright (c) 2005-2014 by Cisco Systems, Inc.
All rights reserved.
Hostname: ServiceEngine115
Version information of installed applications
---------------------------------------------
Cisco Identity Services Engine
---------------------------------------------
Version : 2.0.0.306
Build Date : Thu Oct 8 13:25:23 2015
Install Date : Tue Nov 17 21:02:22 2015
Cisco Identity Services Engine Patch
---------------------------------------------
Version : 5
Install Date : Fri Jul 07 01:57:01 2017
Products Confirmed Not Vulnerable
No other Cisco products are currently known to be affected by this
vulnerability.
Cisco has confirmed that this vulnerability does not affect Cisco ISE
Passive Identity Connector.
Details
This vulnerability requires the configured ISE Admin portal to use an
external identity source for authentication. This extends to any external
identity source that can provide external groups supported by ISE.
Workarounds
There are no workarounds that address this vulnerability.
Fixed Software
Cisco has released free software updates that address the vulnerability
described in this advisory. Customers may only install and expect support
for software versions and feature sets for which they have purchased
a license. By installing, downloading, accessing, or otherwise using
such software upgrades, customers agree to follow the terms of the
Cisco software license:
http://www.cisco.com/en/US/docs/general/warranty/English/EU1KEN_.html
Additionally, customers may only download software for which they
have a valid license, procured from Cisco directly, or through a
Cisco authorized reseller or partner. In most cases this will be a
maintenance upgrade to software that was previously purchased. Free
security software updates do not entitle customers to a new software
license, additional software feature sets, or major revision upgrades.
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.
Customers Without Service Contracts
Customers who purchase directly from Cisco but do not hold a Cisco
service contract and customers who make purchases through third-party
vendors but are unsuccessful in obtaining fixed software through their
point of sale should obtain upgrades by contacting the Cisco TAC:
http://www.cisco.com/en/US/support/tsd_cisco_worldwide_contacts.html
Customers should have the product serial number available and be prepared
to provide the URL of this advisory as evidence of entitlement to a
free upgrade.
Fixed Releases
Customers should upgrade to an appropriate release as indicated in
the following table:
Cisco Identity Services Engine Release
First Fixed Release for This Vulnerability
1.3.0 Affected; migrate to 1.4
1.4.0 1.4.0 Patch 11
2.0.0 2.0.0 Patch 5
2.0.1 2.0.1 Patch 5 (see note)
2.1.0 2.1.0 Patch 2
2.2.x Not affected
Note: Software Release 2.0.1 Patch 5 is currently not posted. Until
this release is posted, please migrate to a fixed release.
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 internally.
URL
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170802-ise
Revision History
Version Description Section Status Date
1.0 Initial public release. -- Final 2017-August-02
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:
http://www.auscert.org.au/render.html?cid=1980
===========================================================================
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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=XgPQ
-----END PGP SIGNATURE-----