Mort Bay Jetty 6.x through 6.1.22 and 7.0.0 writes backtrace data without sanitizing non-printable characters which might allow remote attackers to modify a window's title or possibly execute arbitrary commands or overwrite files via an HTTP request containing an escape sequence for a terminal emulator related to (1) a string value in the Age parameter to the default URI for the Cookie Dump Servlet in test-jetty-webapp/src/main/java/com/acme/CookieDump.java under cookie/ (2) an alphabetic value in the A parameter to jsp/expr.jsp or (3) an alphabetic value in the Content-Length HTTP header to an arbitrary application.