Apache SpamAssassin before 3.1.8 allows remote attackers to cause a denial of service via long URLs in malformed HTML, which triggers "massive memory usage."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10018
https://issues.rpath.com/browse/RPL-1073
https://exchange.xforce.ibmcloud.com/vulnerabilities/32536
http://www.vupen.com/english/advisories/2007/0628
http://www.securitytracker.com/id?1017666
http://www.securityfocus.com/bid/22584
http://www.redhat.com/support/errata/RHSA-2007-0075.html
http://www.novell.com/linux/security/advisories/2007_6_sr.html
http://www.mandriva.com/security/advisories?name=MDKSA-2007:049
http://svn.apache.org/repos/asf/spamassassin/branches/3.1/build/announcements/3.1.8.txt
http://spamassassin.apache.org/advisories/cve-2007-0451.txt
http://security.gentoo.org/glsa/glsa-200703-02.xml
http://secunia.com/advisories/24889
http://secunia.com/advisories/24307
http://secunia.com/advisories/24265
http://secunia.com/advisories/24256
http://secunia.com/advisories/24250
http://secunia.com/advisories/24200
http://secunia.com/advisories/24197
http://rhn.redhat.com/errata/RHSA-2007-0074.html