Tls Sslv3 Man In The Middle (mitm) Vulnerability
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basic TLS handshake
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...
TLS handshake with client cert (ideal) client hello server hello certificate certificate request server hello done certificate client key exchange certificate verify change cipher spec finished change cipher spec finished GET /secure HTTP/1.1 HTTP/1.1 OK
TLS handshake with client cert (typical) c s client hello server hello certificate server hello done client key exchange change cipher spec finished change cipher spec finished GET /secure HTTP/1.1 hello request server-initiated renegotiation
client hello server hello certificate certificate request server hello done certificate client key exchange certificate verify change cipher spec finished change cipher spec finished HTTP/1.1 OK
c
TLS handshake with client cert - mitm remix m client hello client hello server hello certificate server hello done client key exchange change cipher spec finished change cipher spec finished POST /secure/evil.html HTTP/1.1 hello request
server-initiated renegotiation
client hello
replay server hello certificate certificate request server hello done
server hello certificate certificate request server hello done
certificate client key exchange certificate verify change cipher spec
certificate client key exchange certificate verify change cipher spec finished
change cipher spec
change cipher spec finished HTTP/1.1 OK
GET /secure HTTP/1.1
s
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...
TLS handshake with client cert (ideal) client hello server hello certificate certificate request server hello done certificate client key exchange certificate verify change cipher spec finished change cipher spec finished GET /secure HTTP/1.1 HTTP/1.1 OK
TLS handshake with client cert (typical) c s client hello server hello certificate server hello done client key exchange change cipher spec finished change cipher spec finished GET /secure HTTP/1.1 hello request server-initiated renegotiation
client hello server hello certificate certificate request server hello done certificate client key exchange certificate verify change cipher spec finished change cipher spec finished HTTP/1.1 OK
c
TLS handshake with client cert - mitm remix m client hello client hello server hello certificate server hello done client key exchange change cipher spec finished change cipher spec finished POST /secure/evil.html HTTP/1.1 hello request
server-initiated renegotiation
client hello
replay server hello certificate certificate request server hello done
server hello certificate certificate request server hello done
certificate client key exchange certificate verify change cipher spec
certificate client key exchange certificate verify change cipher spec finished
change cipher spec
change cipher spec finished HTTP/1.1 OK
GET /secure HTTP/1.1
s
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