The parse_chunk_header function in libtorrent before 1.1.1 allows remote attackers to cause a denial of service (crash) via a crafted (1) HTTP response or possibly a (2) UPnP broadcast.
https://github.com/arvidn/libtorrent/pull/782/files
https://github.com/arvidn/libtorrent/issues/780
http://www.securityfocus.com/bid/91498
http://www.openwall.com/lists/oss-security/2016/06/05/1
http://www.openwall.com/lists/oss-security/2016/06/04/9
http://lists.opensuse.org/opensuse-updates/2016-09/msg00043.html
http://lists.opensuse.org/opensuse-updates/2016-06/msg00103.html
http://lists.opensuse.org/opensuse-updates/2016-06/msg00079.html