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Cisco Bug: CSCup47885 - ASA: Page fault traceback in DATAPATH when DNS inspection is enabled

Last Modified

Apr 16, 2020

Products (1)

  • Cisco ASA 5500-X Series Firewalls

Known Affected Releases

9.1(5.7) 9.2(2)

Description (partial)

An ASA may generate a traceback and reload in the DATAPATH thread while processing DNS traffic when DNS inspection is enabled.

The ASA must be running or higher.
This issue will trigger when we do DNS reverse loop up with DNS inspection  enabled.

When a customer do reverse look up on IP addresses and receives a PTR Reply with more number of records  they will  hit this issue.
This issue will not be seen without reverse loop up
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