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Cisco Bug: CSCuo63320 - Sig 1300-0 fires for TCP keep-alive segments

Last Modified

Aug 05, 2015

Products (11)

  • Cisco IPS 4200 Series Sensors
  • Cisco ASA 5555-X IPS Security Services Processor
  • Cisco IPS 4345 Sensor
  • Cisco IPS 4510 Sensor
  • Cisco IPS 4520 Sensor
  • Cisco ASA 5525-X IPS Security Services Processor
  • Cisco ASA 5545-X IPS Security Services Processor
  • Cisco ASA 5515-X IPS Security Services Processor
  • Cisco IPS 4360 Sensor
  • Cisco ASA 5585-X IPS Security Services Processor
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Known Affected Releases


Description (partial)

IPS normalizer signature 1300-0 may fire unexpectedly when TCP keep-alive segment is received holding 1-byte garbage data.

This was found on inline IPS sensor running 7.1(8)E4. Promiscuous mode sensors and other IPS versions are likely to be affected.
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