session_input_channel_req(Channel *c, const char *rtype)
{
	int success = 0;
	Session *s;

	if ((s = session_by_channel(c->self)) == NULL) {
		logit("session_input_channel_req: no session %d req %.100s",
		    c->self, rtype);
		return 0;
	}
	debug("session_input_channel_req: session %d req %s", s->self, rtype);

	/*
	 * a session is in LARVAL state until a shell, a command
	 * or a subsystem is executed
	 */
	if (c->type == SSH_CHANNEL_LARVAL) {
		if (strcmp(rtype, "shell") == 0) {
			success = session_shell_req(s);
		} else if (strcmp(rtype, "exec") == 0) {
			success = session_exec_req(s);
		} else if (strcmp(rtype, "pty-req") == 0) {
			success = session_pty_req(s);
		} else if (strcmp(rtype, "x11-req") == 0) {
			success = session_x11_req(s);
		} else if (strcmp(rtype, "auth-agent-req@openssh.com") == 0) {
			success = session_auth_agent_req(s);
		} else if (strcmp(rtype, "subsystem") == 0) {
			success = session_subsystem_req(s);
		} else if (strcmp(rtype, "env") == 0) {
			success = session_env_req(s);
		}
	}
	if (strcmp(rtype, "window-change") == 0) {
		success = session_window_change_req(s);
	} else if (strcmp(rtype, "break") == 0) {
		success = session_break_req(s);
	}

	return success;
}

This category addresses vulnerabilities caused by flawed access control mechanisms, where incorrect permission settings allow unauthorized users to access restricted resources.