CVE-2015-4199 - Pass Thermometer

Description

Race condition in the IPv6-to-IPv4 functionality in Cisco IOS 15.3S in the Performance Routing Engine (PRE) module on UBR devices allows remote attackers to cause a denial of service (NULL pointer free and module crash) by triggering intermittent connectivity with many IPv6 CPE devices aka Bug ID CSCug47366.

Reference

http://tools.cisco.com/security/center/viewAlert.x?alertId=39423 http://www.securityfocus.com/bid/75335 http://www.securitytracker.com/id/1032692