Cisco IPv6 Denial of Service Vulnerability

["US-CERT" <US-CERT () ncas us-cert gov>]

NCCIC / US-CERT

National Cyber Awareness System:

Cisco IPv6 Denial of Service Vulnerability [ 
https://www.us-cert.gov/ncas/current-activity/2015/02/25/Cisco-IPv6-Denial-Service-Vulnerability ] 02/25/2015 10:39 AM 
EST 
Original release date: February 25, 2015

Cisco has identified a vulnerability that could allow an unauthenticated, remote attacker to cause a denial of service 
condition. The vulnerability is due to improper processing of malformed IPv6 packets carrying extension headers. Cisco 
Network Convergence System 6000 (NCS 6000) and Cisco Carrier Routing System X (CRS-X) running an affected version of 
Cisco IOS XR Software are affected by this vulnerability.

Users and administrators are encouraged to review the Cisco Advisory [ 
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20150220-ipv6 ] and apply the necessary 
updates.

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