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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2016.2170 Cisco IOS XR for NCS6000 Series Devices OSPF Packet Processing Denial of Service Vulnerability 15 September 2016 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Cisco NCS6000 series devices Publisher: Cisco Systems Operating System: Cisco Impact/Access: Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2016-1433 Original Bulletin: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160914-iosxr - --------------------------BEGIN INCLUDED TEXT-------------------- Cisco IOS XR for NCS6000 Series Devices OSPF Packet Processing Denial of Service Vulnerability Medium Advisory ID: cisco-sa-20160914-iosxr First Published: 2016 September 14 16:00 GMT Version 1.0: Final Workarounds: No workarounds available Cisco Bug IDs: CSCuz66289 CVSS Score: Base 5.0, Temporal 4.1 CVE-2016-1433 CWE-399 Summary A vulnerability in the OSPFv3 processing of Cisco IOS XR for Cisco CRS platforms could allow an unauthenticated, remote attacker to cause a reload of the OSPFv3 process and result in a limited denial of service (DoS) condition on the affected device. The vulnerability is due to insufficient logic in the processing of crafted OSPFv3 packets. An attacker could exploit this vulnerability by sending crafted OSPFv3 packets to be processed by an affected device. An exploit could allow the attacker to cause a reload of the OSPFv3 process and cause a limited DoS condition on the affected device. Cisco has released software updates that address this vulnerability. Workarounds that address this vulnerability are not available. This advisory is available at the following link: http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160914-iosxr Affected Products Vulnerable Products Cisco 64-bit releases of IOS XR for Cisco NCS6000 series devices are affected by this vulnerability. Only 64-bit NCS6k platforms are affected. A device is vulnerable if it is configured to process OSPFv3. Exploiting a vulnerability against an affected device results in a crash of the OSPFv3 process, followed by a potential effect on data traffic relying on the exchanged routes. Products Confirmed Not Vulnerable No other Cisco products are currently known to be affected by this vulnerability. Workarounds There are no workarounds that address this vulnerability. Fixed Software Cisco provides information about fixed software in Cisco bugs, which are accessible through the Cisco Bug Search Tool. 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-20160914-iosxr Revision History Version Description Section Status Date 1.0 Initial public release. Final 2016-September-14 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. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. 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 iQIVAwUBV9oGyIx+lLeg9Ub1AQifaA//V/L9i5OvDrfrAOIruJKjqzPzTHZLuLnT i80rHCJMiyCa3iLrMyCbfWDDA9KWx6xbu/tHr8PhtfUajWTfdrKA6aIpkXJRH19n k1+Q6yzYLLPUGFrFFwplcmQ3X/kIN6EdyKNjLw50akIU20jXbo9osgCgbHZ/4Are 8N4fOmGe/3adU+gTpmIgsnf/PvQHS+O9TDuHtPpmqlKdflAhphbvC8/4jV1GpfmY ggj3FFY52SMrniJ+kaJp3T4kb3F19sHY6mx+lTI+PaREqXNY1rmSRLWXyi364h85 T9G8XQf9CdQKp70Nz76fO7EjvjMI/0TmEtne3TL3SmnJDfDcsjJ6gc5T6aT7FEhJ wzLVJnpxBJ4lXwiMfRIZVdfSFJ3c1NfiPo9f7o7pW/oaRVO0dHDTx+THaoszIKXa CpP/ae8acqeLuMtm9WrpZ5vQfzreX9YKzpk+zt0puRTbl9JO5LInd6YPzYYiWpr7 rUaNlWXsDhQMYJGCnosZBCBRI1yYskEnysW5qxeSxmt4xxnmTufVQNvb31TX8TkV BAfuT8OQ/rG2akexifdO1pJqymCwZ2RMfWdqw7GmJ1MzD9YoBjQeTR5voWZYa5vH ervPQEOnEAjJfMBFzJk6tf/WlNsDjdwgcdIAyrxT+6KvEFTChGExLjyQVga0nZmX BzwDzZyOrT0= =muYQ -----END PGP SIGNATURE-----