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Cisco Bug: CSCvi22374 - nTED aborts TLS transaction when client presents a certificate with digSig in critical KeyUsage ext

Last Modified

Mar 15, 2018

Products (1)

  • Headend System Releases

Known Affected Releases

TED-5.1.4-1

Description (partial)

Symptom:
The nTED aborts the TLS transaction when the client presents a certificate with digitalSignature included in the KeyUsage extension and that extension is set to critical.  digitalSignature in the KeyUsage extension should be allowed in a client certificate because the client signs a hash of the cumulative TLS handshake to prove access to the client private key (this is in the certificate verify message).

Conditions:
Client certificate contains:
            X509v3 Key Usage: critical
                Digital Signature
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  • Full Description (including symptoms, conditions and workarounds)
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