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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2014.0267 Cisco IPS MainApp SNMP Denial of Service Vulnerability 3 March 2014 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Cisco IPS Publisher: Cisco Systems Operating System: Cisco Impact/Access: Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2014-2103 Original Bulletin: http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2014-2103 - --------------------------BEGIN INCLUDED TEXT-------------------- Cisco Security Notice Cisco IPS MainApp SNMP Denial of Service Vulnerability http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2014-2103 CVE ID: CVE-2014-2103 Release Date: 2014 February 27 17:16 UTC (GMT) Last Updated: 2014 February 27 17:16 UTC (GMT) Summary A vulnerability in the SNMP code of Cisco Intrusion Prevention System (IPS) Software could allow an unauthenticated, remote attacker to cause the MainApp process to become unresponsive. This creates a denial of service (DoS) condition because the Cisco IPS sensor is not able to execute several critical tasks including alert notification, event store management, and sensor authentication. The Cisco IPS web server will also be unavailable while the MainApp process is unresponsive. Additionally, due to this general system failure, other processes such as the Analysis Engine may not function properly. The vulnerability is due to improper handling of malformed SNMP packets. An attacker may exploit this vulnerability by sending malformed SNMP packets to the management interface of the affected system. The vulnerability can be triggered by SNMP version 1 (v1), v2 and v3. If SNMP v3 user is configured with the noAuth option, the attacker could perform the attack without providing valid credentials. Cisco does not recommend configuring SNMP v3 user with the noAuth option. Traffic passing through the sensing interfaces will not trigger this vulnerability. If the Cisco IPS is configured in promiscuous mode, mitigation actions that require MainApp processing, such as shun or rate-limit, may be unavailable. If the Cisco IPS is configured in inline mode, the sensor may not correctly perform inspection and mitigation actions because the Analysis Engine process may not be functioning properly. Affected Products Product More Information CVSS Intrusion Prevention System (IPS) CSCum52355, CSCul49309 6.8/6.1 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. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME. A stand-alone 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. - --------------------------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 iQIVAwUBUxPZ/xLndAQH1ShLAQLS8xAArrcR/Z7kKr2tHLRpWZdgs/OxrXiIa6hm YGI702d9FF7fiJV1R0Ykp84L/wsQaz2WMV+bYN3tvonOvVgS1aUss3PWoXEdjU/f Y2Y3kAagwwR/+ru46zh/4OtoGuIPcQTHL0qHsfJCJIAjWYzmyNszKI5ea3gkZyhH EBofURABDPnRSA1OjmAHdEEFA0RiqrycrugLoFXbG1KDzh1Myi9MdNL+QFHQctYP CQI2bl8D+4cx9RE8w5tUYsiw3BZd7H5R3VGTVSuU2vtkxfLEVAvuhs9bdEpstCy1 +rWsDhTbln0E4HOrtC0ot+GU1g0n1Xgv3hREgeYcS4jsbP5OE2Hw+EKPzgWTXLkr CR+gljYrCDZBow+KOv0ZJQH2r2zFnvrmxRYgS6/VreEdWKgWtWb0Fy7+iyoHNRG4 leovIop/Sw9LciOpUQhESLVE2Zwpis+nmL0guszrUjDJL1LhpWPjIFvIWBtBz15V jRxefV4o1+MmVAz+QsLs1GRvIUnb97Q3JVyw3zkviWvJBsTW0Sa4905OglrXyIu2 tk3igwOnU3pZ3K5OxaBsh0BE6UTJE1elHbgbLLnAsEEeUilupLLEzHbnPsk6wE9u 9syYUwti5I1/YvmgKbuzj1nCMEJaIs7RHM90KBiwHF92/ySZLF2GpWfHjlK+o4lW c2yeYqOqjWE= =nYnL -----END PGP SIGNATURE-----