The terminal dispatcher in mosh before 1.2.1 allows remote authenticated users to cause a denial of service (long loop and CPU consumption) via an escape sequence with a large repeat count value.
https://github.com/keithw/mosh/issues/271
https://github.com/keithw/mosh/commit/9791768705528e911bfca6c4d8aa88139035060e
https://github.com/keithw/mosh/blob/master/ChangeLog
https://exchange.xforce.ibmcloud.com/vulnerabilities/75779
https://bugzilla.redhat.com/show_bug.cgi?id=823943
http://www.securityfocus.com/bid/53646
http://www.openwall.com/lists/oss-security/2012/05/22/9
http://secunia.com/advisories/49260
http://lists.fedoraproject.org/pipermail/package-announce/2012-June/082850.html
http://lists.fedoraproject.org/pipermail/package-announce/2012-June/082814.html
http://lists.fedoraproject.org/pipermail/package-announce/2012-June/082766.html