17 April 2013
Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2013.0543 Secondary Flows Lookup Denial of Service Vulnerability 17 April 2013 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Cisco ASA Publisher: Cisco Systems Operating System: Cisco Impact/Access: Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2012-5415 Original Bulletin: http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2012-5415 - --------------------------BEGIN INCLUDED TEXT-------------------- Secondary Flows Lookup Denial of Service Vulnerability http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2012-5415 CVE ID: CVE-2012-5415 Release Date: 2013 April 11 12:34 UTC (GMT) Last Updated: 2013 April 11 12:34 UTC (GMT) Summary A vulnerability in the code that executes a look-up of secondary flows within the connections table of the Cisco ASA could allow an unauthenticated, remote attacker to cause high CPU utilization and potentially lead to the reload of the affected system. The vulnerability is due to a race condition when a non-optimal look-up of the hash of a secondary flow within the connection table is performed on the affected system. An attacker could exploit this vulnerability by creating several connections that will result in multiple secondary flows passing through and being inspected by the affected system. Affected Products Product More Information CVSS Cisco Adaptive Security Appliance (ASA) Software CSCue31622, CSCuc71272 5.4/4.5 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/en/US/products/products_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 firstname.lastname@example.org 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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