Icecast 1.3.7, and other versions before 1.3.11 with HTTP server file streaming support enabled allows remote attackers to cause a denial of service (crash) via a URL that ends in . (dot), / (forward slash), or \ (backward slash).
Buffer overflows in (1) Icecast before 1.3.9 and (2) libshout before 1.0.4 allow remote attackers to cause a denial of service (crash) and execute arbitrary code.