Stack-based buffer overflow in the guac_client_plugin_open function in libguac in Guacamole before 0.6.3 allows remote attackers to cause a denial of service (crash) or execute arbitrary code via a long protocol name.
https://bugzilla.redhat.com/show_bug.cgi?id=856743
http://www.openwall.com/lists/oss-security/2012/09/11/7
http://www.openwall.com/lists/oss-security/2012/09/11/3
http://lists.fedoraproject.org/pipermail/package-announce/2012-September/088272.html
http://lists.fedoraproject.org/pipermail/package-announce/2012-September/088218.html
http://lists.fedoraproject.org/pipermail/package-announce/2012-September/088031.html
http://guac-dev.org/trac/changeset/7dcefa744b4a38825619c00ae8b47e5bae6e38c0/libguac