FastCGI (aka fcgi and libfcgi) 2.4.0 allows remote attackers to cause a denial of service (segmentation fault and crash) via a large number of connections.
advisories.mageia.org/MGASA-2015-0184.html
www.openwall.com/lists/oss-security/2015/02/06/4
www.openwall.com/lists/oss-security/2015/02/07/4
bugs.debian.org/cgi-bin/bugreport.cgi?bug=681591
bugs.launchpad.net/ubuntu/+source/libfcgi/+bug/933417
bugzilla.redhat.com/show_bug.cgi?id=1189958
exchange.xforce.ibmcloud.com/vulnerabilities/100696