Cisco IOS XR 4.2.3, 4.3.0, 4.3.4, and 5.3.1 on ASR 9000 devices allows remote attackers to cause a denial of service (CRC and symbol errors, and interface flap) via crafted bit patterns in packets, aka Bug ID CSCuv78548.Referenceshttp://www.securitytracker.com/id/1035560http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160412-asr
