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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2016.1245 Cisco Identity Services Engine Active Directory Integration Component Remote Denial of Service Vulnerability 18 May 2016 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Cisco Identity Services Engine Publisher: Cisco Systems Operating System: Cisco Impact/Access: Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2016-1402 Original Bulletin: http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160517-ise - --------------------------BEGIN INCLUDED TEXT-------------------- Cisco Security Advisory Cisco Identity Services Engine Active Directory Integration Component Remote Denial of Service Vulnerability Medium Advisory ID: cisco-sa-20160517-ise Published: 2016 May 17 00:00 GMT Version 1.0: Final CVSS Score: Base - 5.0 Workarounds: Yes Cisco Bug IDs: CSCun25815 CVE-2016-1402 CWE-119 Summary A vulnerability in the Active Directory integration component of Cisco Identity Service Engine (ISE) could allow an unauthenticated, remote attacker to perform a denial of service 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 the failures of all subsequent authentication requests for the same Active Directory domain. Cisco has released software updates that address this vulnerability. Workarounds that address this vulnerability are available. This advisory is available at the following link: http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160517-ise Affected Products Vulnerable Products Cisco Identity Services Engine (ISE) Software versions prior to 1.2.0.899 patch 7 are affected. Products Confirmed Not Vulnerable No other Cisco products are currently known to be affected by this vulnerability. Workarounds The following workaround is available: Access the command-line interface (CLI) of the affected ISE Policy Services Node (PSN) Enter the following command into the CLI: application configure ise Use option [5] Clear Active Directory Trusts Cache and restart/apply Active Directory setting Reboot the PSN Fixed Software When considering software upgrades, customers are advised to consult the Cisco Security Advisories and Responses archive at http://www.cisco.com/go/psirt and review subsequent advisories 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-20160517-ise Revision History Version Description Section Status Date 1.0 Initial public release. Final 2016-May-17 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. 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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 iQIVAwUBVzvCQ36ZAP0PgtI9AQIVbg//b/8TcSEn6ts2jetpCmrvPIj2t0zFGBQe +vDBu2UkkrZJ2KLC9NU0yYdU1IRsNbf6wrQrH1kF6g66hxev6w3aAPNS1HcnLk4F Gmlv988zBys2fhxgHP+JhHg5oYoLHTjO52DIM16liAxeahEko//j2sP+J6YvSR95 tQqDtlpXsZjRJUmpm+n0GKQWHBzX2TGW46e2bvrR+g2ATkCOyqesLtsPxJ9bcMgX Jt75fDESnmLqUd3uvJ+6TkTpisYc/m6is+0AAgeW+UFvCtMnM3Mn667k9QlKDXOX sBUKFv6jUEFtSunLpqsMJECpMeOI3nKBbnuRNj4NdSs4E3UIn0oI+/aY14moEH7j 9bB8biZqUUGg7p6DwIdys/Fho955z/qlLoQPfZNagxqbDuijoaHr/E6yxQlyNvns sMgVpsGiTT3gYHDIG55LpCHbY408ZQXpSN0DK1AFMKn1Ef9a7h7JwCObMkOHbqdc o1aBU0M1Lz77vtYmGwonW6jrYisQE+my9NAKsv/8aH9ZFFzO5VZsu5/9/yhxTi5B zljUfGlQmf+9CEPkwxGPJCm4dxHxt8pMSqqwAy2q4gnOPmCvDZ8ed2dr9XtXUufX oKGvF/NSWDKxtTsWsmC0a24iDzkK9qgdetC+HxKfEEcg5otpFKwEXCBHxV9UAnt1 0TF/2XDbafw= =qZvb -----END PGP SIGNATURE-----