iPlanet (formerly Netscape) Enterprise Server 4.1 allows remote attackers to cause a denial of service via a long HTTP GET request that contains many "/../" (dot dot) sequences.
https://exchange.xforce.ibmcloud.com/vulnerabilities/5983
https://euvd.enisa.europa.eu/vulnerability/EUVD-2001-0252
http://www.securityfocus.com/bid/2282