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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2016.3040 Cisco Identity Services Engine Active Directory Integration Component Denial of Service Vulnerability 20 December 2016 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Cisco Identity Services Engine Publisher: Cisco Systems Operating System: Cisco Impact/Access: Denial of Service -- Remote/Unauthenticated Resolution: None CVE Names: CVE-2016-9198 Original Bulletin: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20161207-ise - --------------------------BEGIN INCLUDED TEXT-------------------- Cisco Security Advisory Cisco Identity Services Engine Active Directory Integration Component Denial of Service Vulnerability Medium Advisory ID: cisco-sa-20161207-ise First Published: 2016 December 7 16:00 GMT Version 1.0: Final Workarounds: Yes Cisco Bug IDs: CSCuw15041 CVSS Score: Base 5.0, Temporal 4.1 CVE-2016-9198 CWE-399 Summary A vulnerability in the Active Directory integration component of Cisco Identity Services Engine (ISE) could allow an unauthenticated, remote attacker to perform a denial of service (DoS) attack. The vulnerability is due to improper handling of Password Authentication Protocol (PAP) authentication requests when ISE is configured with an authorization policy based on Active Directory group membership. An attacker could exploit this vulnerability by crafting a special but formally correct PAP authentication request that will trigger the issue. An exploit could allow the attacker to cause all subsequent authentication requests for the same Active Directory domain to fail. There are workarounds that address this vulnerability. This advisory is available at the following link: http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20161207-ise Affected Products Vulnerable Products Cisco ISE is affected. 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 The following workaround steps are available: Access the CLI of the affected ISE Policy Services Node (PSN) Enter application configure ise Choose option 5: Clear Active Directory Trusts Cache and restart/apply Active Directory settings Reboot the PSN 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. URL http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20161207-ise Revision History Version Description Section Status Date 1.0 Initial public release. — Final 2016-December-07 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. - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. 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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 iQIVAwUBWFjcFIx+lLeg9Ub1AQjiyw//ZLFtvD+HzHIBI5RdIxOikI25Y099SNMH vwQHyeVdFSFc36E26Voso2PBYu/Q4K9JKYsvs4bbBfJr5JWXKzn0NaAhLBh8R4+3 N+L/P8LenJeOiYosYun6BtwrOXwp8Go9EZqtZhaQc3gQxH7x36nN4wzu10WAcuxZ +knj9ArE+no7+qB3Ah5tDZwujBbZrP1xPQNzYPrjTlym7N6jANVjBwzid2rEhBg2 fwALa3ZrllwveLvhVCOsN6vLhiAvoBWxjE+XewuroL7tZf8EHZJM51h6g6bgs8q0 F2zgi4ffUXjXZNri+RRc30cg0tQwQ3sFRT8pKfMoEy7SUE6LVNt89yKHlG1bxnHi bVRbUYzs1LRqVnGeMKnPDwOsmepGjllwngokZ++5teaju/9b83cDppAQCbHBzWSK nYkOvX5Qa7i6Sa7JbsjOvifDaL4ZdQWw8RnEAhnIiRBvOGT9ikfveXFJCLfTzPTu o6uWIeaSgAw6vE/dX09GTewBTXJe9io+7HGLWPoXbTe9/7FVQ5G7BAfo9JzcUBZ9 PPMvH0Tx9HmkDU73ZBOYAhCtWYmC+ieVrECpQqx8WHujQIFeWc9dOoAS5skXKAGQ u3fQ7GyU/j+A95rHKyWQDxaFxddt6HuqBQKJ5c42N5iawJWLcYyysJOAuI6OUaat pOGZE/m25Zc= =w4gC -----END PGP SIGNATURE-----