Good luck in updating it in OS X (try running `ssh -V` there). Good that OS X will update to a more recent version in El Capitan and also switch to LibreSSL (great step forward).
If you're seeing OpenSSL in the output, you have probably installed SSH via Homebrew.
OpenSSL 0.9.8zd 8 Jan 2015
OpenSSH_6.2p2, OSSLShim 0.9.8r 8 Dec 2011
Not sure if you're being sarcastic?
"LibreSSL has the affected code and is thought to be vulnerable (untested)." - https://jbp.io/2015/06/11/cve-2015-1788-openssl-binpoly-hang...
https://github.com/libressl-portable/portable/blob/master/Ch...
The last time a bunch of OpenSSL CVEs dropped, there were 14 of them; two of which were rated sev: High. LibreSSL was affected by 5 out of the 14, none of which were high-severity.
This time around there are seven vulnerabilities and LibreSSL is affected by four of them[1].
So there's at least 12 reasons.
[0] https://marc.info/?l=openbsd-cvs&m=142677372515025&w=2
[1] https://marc.info/?l=openbsd-announce&m=143406498020131&w=2