The remote host is running a version of Mac OS X 10.5 that is older than version 10.5.6. Mac OS X 10.5.6 contains security fixes for the following products :
Binary data 4789.prm
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1391
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-3170
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-3623
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-3644
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4216
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4217
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4218
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4219
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4220
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4221
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4222
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4223
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4224
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4234
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4236
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4237
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4818
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4819
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4820
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4821
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4822
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4823
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4824
lists.apple.com/archives/security-announce/2008/Dec/msg00000.html
support.apple.com/kb/HT3338