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Cisco Bug: CSCte72981 - ICMPv6 Option Length field does not work in Atomic IP Advanced Engine

Last Modified

Aug 10, 2016

Products (10)

  • Cisco IPS 4200 Series Sensors
  • Cisco IPS 4255 Sensor
  • Cisco Catalyst 6500 Series Intrusion Detection System (IDSM-2) Services Module
  • Cisco IPS 4260 Sensor
  • Cisco IPS Sensor Software Version 7.0
  • Cisco Intrusion Prevention System Network Module
  • Cisco IPS 4270-20 Sensor
  • Cisco IPS 4240 Sensor
  • Cisco ASA Advanced Inspection and Prevention (AIP) Security Services Module
  • Cisco Integrated Services Routers Intrusion Prevention System Module

Known Affected Releases


Description (partial)


Given an Option Length field in an ICMPv6 packet, the Atomic IP Engine does not properly fire alerts.


ICMPv6 packets sent to be processed on a signature for Atomic IP Advanced Engine.  Configure a custom signature with the following parameters:

Fragmented Status: Fragmented
Layer 4 Protocol: ICMPv6
ICMPv6 Option Type: Yes
ICMPv6 Option Type: 24
ICMPv6 Option Length: 32
ICMPv6 Type: 134
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
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