Directory traversal vulnerability in the list_directory function in Icecast 1.3.12 allows remote attackers to determine if a directory exists via a .. (dot dot) in the GET request, which returns different error messages depending on whether the directory exists or not.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2002-1961
http://www.securityfocus.com/bid/5189