Buffer overflow in httpd.c of fnord 1.6 allows remote attackers to create a denial of service (crash) and possibly execute arbitrary code via a long CGI request passed to the do_cgi function.
https://exchange.xforce.ibmcloud.com/vulnerabilities/11121
http://www.securityfocus.com/bid/6635
http://www.securityfocus.com/archive/1/307400/30/26270/threaded