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Cisco Bug: CSCus29775 - SSL: Sporadic TLS 1.2 connection errors on 5500-X platforms with DHE

Last Modified

Feb 13, 2018

Products (1)

  • Cisco ASA 5500-X Series Firewalls

Known Affected Releases

100.13(15.21) 9.3(2)

Description (partial)

Symptom:
A TLS 1.2 connection may fail to complete successfully.
When this happens ASA will display the 402123 (vpn-CRYPTO) sylog , show counters (PKP_ERRORS) and  show ssl errors . If the SSL connection is retried, the session will be successful.

Conditions:
This can happen when using TLS 1.2 DHE ciphers.
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
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