Icecast before 2.4.2, when a stream_auth handler is defined for URL authentication, allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via a request without login credentials, as demonstrated by a request to "admin/killsource?mount=/test.ogg."
https://trac.xiph.org/changeset/27abfbbd688df3e3077b535997330aa06603250f/icecast-server
https://security.gentoo.org/glsa/201508-03
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=782120
http://www.securityfocus.com/bid/73965
http://www.openwall.com/lists/oss-security/2015/04/08/8
http://www.openwall.com/lists/oss-security/2015/04/08/11
http://www.debian.org/security/2015/dsa-3239
http://lists.xiph.org/pipermail/icecast-dev/2015-April/002460.html
http://lists.opensuse.org/opensuse-updates/2015-04/msg00030.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-August/164074.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-August/164061.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-August/163859.html