Review

Cross-site request forgery (CSRF) vulnerability in the admin terminal in Hawt.io allows remote attackers to hijack the authentication of arbitrary users for requests that run commands on the Karaf server, as demonstrated by running "shutdown -f."

io/hawt/web/plugin/karaf/terminal/TerminalServlet.java

doPost(HttpServletRequest, HttpServletResponse)

class TerminalServlet {
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        String encoding = request.getHeader("Accept-Encoding");
        boolean supportsGzip = (encoding != null && encoding.toLowerCase().indexOf("gzip") > -1);
        SessionTerminal st = (SessionTerminal) request.getSession(true).getAttribute("terminal");
        if (st == null || st.isClosed()) {
            st = new SessionTerminal(getCommandProcessor(), getThreadIO());
            request.getSession().setAttribute("terminal", st);
        }
        String str = request.getParameter("k");
        String f = request.getParameter("f");
        String dump = st.handle(str, f != null && f.length() > 0);
        if (dump != null) {
            if (supportsGzip) {
                response.setHeader("Content-Encoding", "gzip");
                response.setHeader("Content-Type", "text/html");
                try {
                    GZIPOutputStream gzos = new GZIPOutputStream(response.getOutputStream());
                    gzos.write(dump.getBytes());
                    gzos.close();
                } catch (IOException ie) {
                    LOG.info("Exception writing response: ", ie);
                }
            } else {
                response.getOutputStream().write(dump.getBytes());
            }
        }
    }

}