The OSPF functionality in Cisco IOS and IOS XE allows remote attackers to cause a denial of service (device reload) via crafted options in an LSA type 11 packet, aka Bug ID CSCui21030.
https://exchange.xforce.ibmcloud.com/vulnerabilities/87762
http://www.securityfocus.com/bid/62904
http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2013-5527