IPSSH (aka the SSH server) in Wind River VxWorks 6.5 through 6.9 allows remote authenticated users to cause a denial of service (daemon outage) via a crafted pty request.
http://jvndb.jvn.jp/jvndb/JVNDB-2013-000020
http://jvn.jp/en/jp/JVN52492830/index.html