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.
lists.fedoraproject.org/pipermail/package-announce/2012-June/082766.html
lists.fedoraproject.org/pipermail/package-announce/2012-June/082814.html
lists.fedoraproject.org/pipermail/package-announce/2012-June/082850.html
secunia.com/advisories/49260
www.openwall.com/lists/oss-security/2012/05/22/9
www.securityfocus.com/bid/53646
bugzilla.redhat.com/show_bug.cgi?id=823943
exchange.xforce.ibmcloud.com/vulnerabilities/75779
github.com/keithw/mosh/blob/master/ChangeLog
github.com/keithw/mosh/commit/9791768705528e911bfca6c4d8aa88139035060e
github.com/keithw/mosh/issues/271