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Cisco Bug: CSCvv98809 - C9200L crashing when accessing via webui and using a 64 Character username generated from yubikey

Last Modified

Oct 09, 2020

Products (1)

  • Cisco IOS

Known Affected Releases

16.12.3

Description (partial)

Symptom:
Catalyst 9200L switch will crash when accessing via Webui and using a username with 64 character string that was generated from a 2-factor stick(yubikey)), 

The device using the 2-factor stick goes to the AAA RADIUS server which handles the authentication through the switch.
 
In the crashinfo, decoded traceback it can be seen that the "aaa_unconfigure_all_dns_resolved_servers" function is attempting to use Redzone memory and crashing the device when Webui is used to access the switch

Conditions:
configuring the switch to use an external AAA RADIUS server and generating a 64 string character username to access via Webui from from a 2-factor stick(yubikey)),
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