Off-by-one buffer overflow in Basic Authentication in Acme Labs thttpd 1.95 through 2.20 allows remote attackers to cause a denial of service and possibly execute arbitrary code.
https://exchange.xforce.ibmcloud.com/vulnerabilities/7595
https://euvd.enisa.europa.eu/vulnerability/EUVD-2001-1473
http://www.securityfocus.com/bid/3562