The remote host has Safari installed that is older than 6.1.4 or 7.0.4, and is thus unpatched for the following WebKit vulnerabilities :
Binary data 8324.prm
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-1325
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-1340
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-1345
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-1362
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-1363
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-1364
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-1365
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-1366
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-1367
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-1368
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-1369
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-1382
packetstormsecurity.com/files/126780/Apple-Security-Advisory-2014-05-12-1.html
support.apple.com/kb/HT6293