The Apache HTTP Server 1.x and 2.x allows remote attackers to cause a denial of service (daemon outage) via partial HTTP requests, as demonstrated by Slowloris, related to the lack of the mod_reqtimeout module in versions before 2.2.15.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A19481
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05158380
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05111017
https://exchange.xforce.ibmcloud.com/vulnerabilities/72345
http://www.securitytracker.com/id/1038144
http://www.securityfocus.com/bid/21865
http://marc.info/?l=bugtraq&m=136612293908376&w=2
http://lists.opensuse.org/opensuse-security-announce/2012-03/msg00002.html
http://lists.opensuse.org/opensuse-security-announce/2012-02/msg00026.html
http://ha.ckers.org/slowloris/
http://archives.neohapsis.com/archives/bugtraq/2007-01/0229.html