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Cisco Bug: CSCvt99342 - unauthenticated PAC provisioning no longer supported - 4.9 and later

Last Modified

Jun 17, 2020

Products (1)

  • Cisco AnyConnect Secure Mobility Client

Known Affected Releases

4.9(0)

Description (partial)

Symptom:
Unauthenticated PAC provisioning occurs when authenticated PAC provisioning is not enabled for EAP-FAST, but anauthenticated PAC provisioning is enabled.  Unauthenticated PAC provisioning uses DH algorithm which is susceptible to MITM attacks and is no longer supported by AnyConnect NAM.

Conditions:
After first successful EAP-FAST authentication when unauthenticated PAC provisioning is enabled.  Also when a PAC expires.
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