Cisco Security Advisory
Cisco IOS XR Software for NCS 6000 Series Devices OSPF Packet Processing Denial of Service Vulnerability
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AV:N/AC:L/Au:N/C:N/I:N/A:P/E:F/RL:OF/RC:C
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A vulnerability in the OSPFv3 processing of Cisco IOS XR Software for Cisco Network Convergence System (NCS) 6000 Series devices 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 an 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: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160914-iosxr
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Vulnerable Products
64-bit releases of Cisco IOS XR Software for Cisco NCS 6000 Series devices are affected by this vulnerability.
Only 64-bit NCS 6000 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.
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There are no workarounds that address this vulnerability.
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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.
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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.
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To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy. This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco.
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Show LessVersion Description Section Status Date 1.1 Corrected information about which devices are affected. Summary Final 2016-September-15 1.0 Initial public release. - Final 2016-September-14
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