Header.pm in Net::DNS before 0.60, a Perl module, (1) generates predictable sequence IDs with a fixed increment and (2) can use the same starting ID for all child processes of a forking server, which allows remote attackers to spoof DNS responses, as originally reported for qpsmtp and spamassassin.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9904
https://exchange.xforce.ibmcloud.com/vulnerabilities/35112
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=245458
http://www.ubuntu.com/usn/usn-483-1
http://www.trustix.org/errata/2007/0023/
http://www.securitytracker.com/id?1018377
http://www.securityfocus.com/bid/24669
http://www.securityfocus.com/archive/1/473871/100/0/threaded
http://www.redhat.com/support/errata/RHSA-2007-0675.html
http://www.redhat.com/support/errata/RHSA-2007-0674.html
http://www.novell.com/linux/security/advisories/2007_17_sr.html
http://www.net-dns.org/docs/Changes.html
http://www.mandriva.com/security/advisories?name=MDKSA-2007:146
http://www.gentoo.org/security/en/glsa/glsa-200708-06.xml
http://www.debian.org/security/2008/dsa-1515
http://support.avaya.com/elmodocs2/security/ASA-2007-351.htm
http://secunia.com/advisories/29354
http://secunia.com/advisories/26543
http://secunia.com/advisories/26508
http://secunia.com/advisories/26417
http://secunia.com/advisories/26231
http://secunia.com/advisories/26211
http://secunia.com/advisories/26075
http://secunia.com/advisories/26055
http://secunia.com/advisories/26014
http://secunia.com/advisories/26012
http://secunia.com/advisories/25829