-----BEGIN PGP SIGNED MESSAGE-----
AUSCERT External Security Bulletin Redistribution
Cisco Identity Services Engine Privilege Escalation Vulnerability
2 November 2017
AusCERT Security Bulletin Summary
Product: Cisco Identity Services Engine (ISE)
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Increased Privileges -- Existing Account
CVE Names: CVE-2017-12261
Revision History: November 2 2017: Added the Original Bulletin link
November 2 2017: Initial Release
- --------------------------BEGIN INCLUDED TEXT--------------------
Cisco Identity Services Engine Privilege Escalation Vulnerability
2017 November 1 16:00 GMT
No workarounds available Cisco Bug IDs:
A vulnerability in the restricted shell of the Cisco Identity Services Engine
(ISE) that is accessible via SSH could allow an authenticated, local attacker
to run arbitrary CLI commands with elevated privileges.
The vulnerability is due to incomplete input validation of the user input for
CLI commands issued at the restricted shell. An attacker could exploit this
vulnerability by authenticating to the targeted device and executing commands
that could lead to elevated privileges. An attacker would need valid user
credentials to the device to exploit this vulnerability.
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:
The vulnerability affects the following Cisco Identity Services Engine (ISE)
products running Release 1.4, 2.0, 2.0.1, 2.1.0:
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: 220.127.116.11
ADE-OS System Architecture: x86_64
Copyright (c) 2005-2014 by Cisco Systems, Inc.
All rights reserved.
Version information of installed applications
Cisco Identity Services Engine
Version : 18.104.22.1686
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
Cisco has confirmed that this vulnerability does not affect Cisco ISE Passive
There are no workarounds that address this vulnerability.
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:
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
In all cases, customers should ensure that the devices to upgrade 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:
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.
Customers should upgrade to an appropriate release as indicated in the
Cisco Identity Services Engine Release First Fixed Release for This Vulnerability
1.3 Affected; migrate to 1.4 patch 12
1.4 1.4 patch 12 (see note)
2.0 2.0 patch 6 (see note)
2.0.1 Affected: migrate to 2.1 patch 5
2.1.0 2.1 patch 5
2.2.0 2.2.0 patch 2
2.3.0 Not affected
Note: Software Release 1.4 patch 12 and 2.0 patch 6 are currently not posted.
Until these releases are 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.
This vulnerability was reported to Cisco by an anonymous security researcher.
- --------------------------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 email@example.com
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
Internet Email: firstname.lastname@example.org
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-----
-----END PGP SIGNATURE-----