resolv.rb in Ruby 1.8.5 and earlier, 1.8.6 before 1.8.6-p287, 1.8.7 before 1.8.7-p72, and 1.9 r18423 and earlier uses sequential transaction IDs and constant source ports for DNS requests, which makes it easier for remote attackers to spoof DNS responses, a different vulnerability than CVE-2008-1447.
https://www.redhat.com/archives/fedora-package-announce/2008-October/msg00299.html
https://www.redhat.com/archives/fedora-package-announce/2008-October/msg00259.html
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10034
https://exchange.xforce.ibmcloud.com/vulnerabilities/45935
http://www.vupen.com/english/advisories/2008/2334
http://www.securityfocus.com/bid/31699
http://www.ruby-lang.org/en/news/2008/08/08/multiple-vulnerabilities-in-ruby/
http://www.redhat.com/support/errata/RHSA-2008-0897.html
http://www.openwall.com/lists/oss-security/2008/09/04/9
http://www.debian.org/security/2008/dsa-1652
http://www.debian.org/security/2008/dsa-1651
http://support.avaya.com/elmodocs2/security/ASA-2008-424.htm
http://slackware.com/security/viewer.php?l=slackware-security&y=2008&m=slackware-security.371754
http://security.gentoo.org/glsa/glsa-200812-17.xml
http://secunia.com/advisories/33178
http://secunia.com/advisories/32948
http://secunia.com/advisories/32371
http://secunia.com/advisories/32256
http://secunia.com/advisories/32255
http://secunia.com/advisories/32219