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Cisco Bug: CSCsy90150 - ASA doesn't properly handle large SubjectAltName field - UPN parse fails

Last Modified

Nov 09, 2016

Products (1)

  • Cisco ASA 5500-X Series Firewalls

Known Affected Releases

8.0(4) 8.2(0.231)

Description (partial)

Symptom:
Client connection with certificates fails when ASA is configured to do authorization using UPN attribute from certificate.

Conditions:
Client certificate SubjectAltName extemsion is >127 bytes
ASA is configured for authorization-required so connection fails if authorization does not complete.
ASA sees the following IKE syslog/debug
Apr 03 14:29:17 [IKEv1]: Group = DefaultRAGroup, IP = 10.10.1.1 User Authorization failed: [UPN] field missing in Subject DN for user name.
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