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Re: if SSLv3 is disabled, why does LWP::UserAgent request indicate successful SSLv3 handshake?

by rizzo (Curate)
on May 23, 2018 at 08:59 UTC ( [id://1215087]=note: print w/replies, xml ) Need Help??


in reply to if SSLv3 is disabled, why does LWP::UserAgent request indicate successful SSLv3 handshake?

Seems SSL v3.0 is not supported by Google. You can test this by trying to force google into a ssl3 connection using:

openssl s_client -ssl3   -connect www.google.com:443

--> connection fails

while

openssl s_client -connect www.google.com:443

and grepping for "Protocol" gives "TLSv1.2" (at least to me) and a working connection.

Using the same command with the "-state" switch und grepping for "SSL" gives the output of the one-liner in OP's post(though I don't get it using Perl)and TLSv1.2.

Maybe there's a need for debugging the debug messages ...
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Re^2: if SSLv3 is disabled, why does LWP::UserAgent request indicate successful SSLv3 handshake?
by bennetthaselton (Novice) on May 23, 2018 at 16:49 UTC
    OK yes I get the same results as you do, so that's a repro without using Perl.

    I've heard that "TLS uses SSL certificates" (e.g. https://learntomato.com/what-is-a-vpn/ ). Although I'm not clear on the mechanics, is that what's going on -- TLS is a different protocol but it uses the public/private keys baked into SSLv3 certificates, and when the debug messages refer to "SSLv3", that's what they're referring to?
      As far as I know, they're using the same cipher suites.
      Why the debug messages refer to SSlv3 although TLS is used for the connection, no clue, sorry.

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