12 June 2014
Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2014.0961 Cisco NX-OS Software HSRP Authentication Denial of Service Vulnerability 12 June 2014 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Cisco NX-OS Publisher: Cisco Systems Operating System: Cisco Impact/Access: Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2014-3295 Original Bulletin: http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2014-3295 - --------------------------BEGIN INCLUDED TEXT-------------------- Cisco Security Notice Cisco NX-OS Software HSRP Authentication Denial of Service Vulnerability http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2014-3295 CVE ID: CVE-2014-3295 Release Date: 2014 June 10 22:13 UTC (GMT) Last Updated: 2014 June 11 18:29 UTC (GMT) Related Documents: Summary A vulnerability in Hot Standby Router Protocol (HSRP) authentication in the Cisco Nexus series could allow an unauthenticated, adjacent attacker to affect the state of HSRP group members and cause black holing of traffic. The vulnerability is due to incorrect parsing of malformed HSRP packets. An attacker could exploit this vulnerability by sending malformed HSRP packets to bypass HSRP authentication. An exploit could allow the attacker to bypass HSRP authentication and affect the state of active HSRP group members, causing them to go to SPEAK state, which leads to black holing of traffic and causes a denial of service (DoS) condition. Affected Products Product More Information CVSS Cisco NX-OS Software CSCup11309 4.8/4.6 What Is a Cisco Security Notice? The Cisco Product Security Incident Response Team (PSIRT) publishes Cisco Security Notices to inform customers of low- to mid-level severity security issues involving Cisco products. Customers who wish to upgrade to a software version that includes fixes for these issues should contact their normal support channels. Free software updates will not be provided for issues that are disclosed through a Cisco Security Notice. For additional information about Cisco PSIRT publications, see the Cisco Security Vulnerability Policy at http://www.cisco.com/web/about/security/psirt/security_vulnerability_policy.html Customers Using Third-Party Support Organizations Customers may have Cisco products that are provided or maintained through prior or existing agreements with third-party support organizations, such as Cisco Partners, authorized resellers, or service providers. For these products, customers should consult their service providers or support organizations to ensure that any applied workaround or fix is the most appropriate in the intended network before it is deployed. 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. 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On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBU5kxQRLndAQH1ShLAQJaRg/9GQeJfXIGI0di7TnNzo7nvcZbbazFljgD Jdn3N5+axgFNTd/f631k/VORUV0a/TyCqqpPf7VgKEWOPe2Xo+2EW5VaE5DYaJBz 6V1NOBWsJqGIwFHldiM5zLpXIqo+jNd3h8zYKG76x1TxrPwteP3yOz2VYleTF5yn fWsMxPYj6mSf7VlkabR5t8wbG6NEYadfSonaqYJChxL/so960rOqFHt34y2SD+73 0nMLSJfnGrhJD7VnqONF5vFkrB5zlC8Y9XP1SNn9G3P2RVxpPNqiV0pEiAdrKyrf xPRakzjFM9tQESt6lMGSNLO90Cq2K6mJUkeAq8tYyn7qNlB2qMdjf58LbgVibWKy dd/ZYn7hQ9wBFB0VAaYLhiJK3+jm6H7/FV1KsDG8eA2MPxSRsuLl7lTDvXrd2Jdc HHPlvvp+yGBSAoPpMnK6tw12yzTFYR1tueUqJrRR/XAUkgY0uBGvuRoxKpBcsoH3 fQTuEcmCxrAml49x+HTH7zdmExAFbPTFr0U7qbcuhf9/GuxNkZ5kHcuoM/+/Uj5L rInBSyIGKqhh3IhYhLFOxA0PH/2W126wRZZuXCbWnSZQUAwZciOXAbXu2qSg/m7y EtJl32Qid9CyPyboX17MouGGTQK2onEk2UvJoB+c+0I7KfEwxpSolallxl1rlNE9 wQGFWEWfxgk= =fp5H -----END PGP SIGNATURE-----