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Description of problem:
If the connection uses TLSv1.2 the Wireshark GUI can't decode the TLS Handshake Protocol Server Key Exchange messages in ECDHE or DHE key exchange, it can do that only if the connection uses TLSv1.0.

Decoding of Server Key Exchange using the CLI tshark command always fails.

Version-Release number of selected component (if applicable):
wireshark-1.8.10-17.el6.x86_64

How reproducible:
Always

Steps to Reproduce:
1. Open wireshark load tlsv1.2-ecdhe-rsa.pcapng

1. tshark -o 'ssl.desegment_ssl_records:TRUE' -d tcp.port==4433,ssl -r /tmp/ -V tlsv1.0-dhe-rsa.pcapng | grep -A 6 'Server Key Exchange'

Actual results:
        Handshake Protocol: Server Key Exchange
            Handshake Type: Server Key Exchange (12)
            Length: 199

Expected results:
        Handshake Protocol: Server Key Exchange
            Handshake Type: Server Key Exchange (12)
            Length: 199
            EC Diffie-Hellman Server Params
                curve_type: named_curve (0x03)
                named_curve: secp256r1 (0x0017)
                Pubkey Length: 65
                pubkey:f00ba2...
etc.

Additional info:
See bug 1222600 for example packet captures

*** Bug 1238674 has been marked as a duplicate of this bug. ***

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHSA-2017-0631.html