The remote host is running a version of Mac OS X 10.7 that is older than version 10.7.4. The newer version contains numerous security-related fixes for the following components :
Binary data 6482.prm
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-1004
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-1005
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-1777
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-1778
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-1944
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-2821
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-2834
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-2895
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-3212
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-3389
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-3919
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-4566
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-4815
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-4885
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-0036
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-0642
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-0649
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-0651
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-0652
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-0654
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-0655
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-0656
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-0657
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-0658
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-0659
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-0660
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-0661
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-0662
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-0675
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-0830
lists.apple.com/archives/security-announce/2012/May/msg00001.html
support.apple.com/kb/HT5281