APC Web/SNMP Management Card prior to Firmware 310 only supports one telnet connection, which allows a remote attacker to create a denial of service via repeated failed logon attempts which temporarily locks the card.Referenceshttps://exchange.xforce.ibmcloud.com/vulnerabilities/6199http://www.securityfocus.com/bid/2430ftp://ftp.apcftp.com/hardware/webcard/firmware/sy/v310/install.txthttp://archives.neohapsis.com/archives/bugtraq/2001-02/0436.html