The mod_cgid module in the Apache HTTP Server before 2.4.10 does not have a timeout mechanism, which allows remote attackers to cause a denial of service (process hang) via a request to a CGI script that does not read from its stdin file descriptor.
https://support.apple.com/HT204659
https://security.gentoo.org/glsa/201504-03
https://h20564.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c04832246
https://bugzilla.redhat.com/show_bug.cgi?id=1120596
http://www.oracle.com/technetwork/topics/security/cpujan2015-1972971.html
http://www.debian.org/security/2014/dsa-2989
http://svn.apache.org/viewvc/httpd/httpd/trunk/modules/generators/mod_cgid.c
http://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x/CHANGES
http://secunia.com/advisories/60536
http://rhn.redhat.com/errata/RHSA-2014-1020.html
http://rhn.redhat.com/errata/RHSA-2014-1019.html
http://marc.info/?l=bugtraq&m=144493176821532&w=2
http://marc.info/?l=bugtraq&m=144050155601375&w=2
http://marc.info/?l=bugtraq&m=143748090628601&w=2
http://marc.info/?l=bugtraq&m=143403519711434&w=2
http://lists.apple.com/archives/security-announce/2015/Apr/msg00001.html
http://httpd.apache.org/security/vulnerabilities_24.html