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AUSCERT External Security Bulletin Redistribution
Cisco Identity Services Engine: Login Attempt Limit Bypass
17 November 2017
AusCERT Security Bulletin Summary
Product: Cisco Identity Services Engine
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Reduced Security -- Remote/Unauthenticated
CVE Names: CVE-2017-12316
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Cisco Identity Services Engine Guest Portal Login Limit Bypass Vulnerability
Advisory ID: cisco-sa-20171115-ise
First Published: 2017 November 15 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs:
* A vulnerability in the Guest Portal login page of Cisco Identity Services
Engine (ISE) could allow an unauthenticated, remote attacker to perform
multiple login attempts in excess of the configured login attempt limit.
The vulnerability is due to insufficient server-side login attempt limit
enforcement. An attacker could exploit this vulnerability by sending
modified login attempts to the Guest Portal login page. An exploit could
allow the attacker to perform brute-force password attacks on the ISE Guest
There are no workarounds that address this vulnerability.
This advisory is available at the following link:
* Vulnerable Products
This vulnerability affects Cisco Identity Services Engine. For information
about affected software releases, consult the Cisco bug ID(s) at the top of
Products Confirmed Not Vulnerable
No other Cisco products are currently known to be affected by this
* There are no workarounds that address this vulnerability.
* 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
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 external researcher Mauricio
Urizar from Deep Security.
* 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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