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tls sslv3 man in the middle (mitm) vulnerability

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  • 8/14/2019 TLS SSLv3 man in the middle (mitm) vulnerability

    1/4

    client hello

    server hello

    certificate

    server hello done

    client key exchange

    change cipher spec

    finished

    change cipher spec

    finished

    GET /secure HTTP/1.1\r\n...

    basic TLS handshake

  • 8/14/2019 TLS SSLv3 man in the middle (mitm) vulnerability

    2/4

    client hello

    server hello

    certificate

    server hello done

    certificate

    change cipher spec

    finished

    change cipher spec

    finished

    TLS handshake with client cert(ideal)

    certificate request

    client key exchange

    certificate verify

    GET /secure HTTP/1.1

    HTTP/1.1 OK

  • 8/14/2019 TLS SSLv3 man in the middle (mitm) vulnerability

    3/4

    client hello

    certificate

    server hello done

    TLS handshake with client cert (typical)

    GET /secure HTTP/1.1

    server hello

    server hello done

    change cipher spec

    finished

    change cipher spec

    finished

    client key exchange

    server hello

    certificate

    server hello done

    certificate

    change cipher spec

    finished

    change cipher spec

    finished

    certificate request

    client key exchange

    certificate verify

    HTTP/1.1 OK

    client hello

    hello request

    c s

    server-initiatedrenegotiation

  • 8/14/2019 TLS SSLv3 man in the middle (mitm) vulnerability

    4/4

    client hello

    certificate

    TLS handshake with client cert - mitm remix

    POST /secure/evil.html HTTP/1.1

    server hello

    change cipher spec

    finished

    change cipher spec

    finished

    client key exchange

    server hello

    certificate

    server hello done

    certificate

    change cipher spec

    finished

    certificate request

    client key exchange

    certificate verify

    HTTP/1.1 OK

    client hello

    hello request

    m sc

    client hello

    server hello done

    server hello

    certificate

    certificate request

    server hello done

    GET /secure HTTP/1.1

    certificate

    change cipher spec

    certificate verify

    client key exchange

    change cipher specchange cipher spec

    finished

    server-initiated renegotiation

    replay


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