CVE:CVE-2017-6720
CNNVD:CNNVD-201709-1028
Cisco Small Business 300 Series Managed Switches等都是美国思科（Cisco）公司的交换机设备。Secure Shell(SSH)subsystem是其中的一个数据加密传输子系统。
多款Cisco产品中的SSH子系统存在拒绝服务漏洞，该漏洞源于程序没有正确的处理SSH连接。远程攻击者可通过登录受影响的交换机并发送恶意的SSH消息利用该漏洞造成拒绝服务（重新加载）。以下产品受到影响：Cisco Small Business 300 Series Managed Switches；Small Business 500 Series Stackable Managed Switches；350 Series Managed Switches；350X Series Stackable Managed Switches；550X Series Stackable Managed Switches；ESW2 Series Advanced Switches。
solution:Upgrade cisco sf302-08pp_firmware to a higher version than 1.4.8.06,and avoid the version (,1.4.8.06); Upgrade cisco sf302-08mpp_firmware to a higher version than 1.4.8.06,and avoid the version (,1.4.8.06); Upgrade cisco sg300-10pp_firmware to a higher version than 1.4.8.06,and avoid the version (,1.4.8.06); Upgrade cisco sg300-10mpp_firmware to a higher version than 1.4.8.06,and avoid the version (,1.4.8.06); Upgrade cisco sf300-24pp_firmware to a higher version than 1.4.8.06,and avoid the version (,1.4.8.06); Upgrade cisco sf300-48pp_firmware to a higher version than 1.4.8.06,and avoid the version (,1.4.8.06); Upgrade cisco sg300-28pp_firmware to a higher version than 1.4.8.06,and avoid the version (,1.4.8.06); Upgrade cisco sf300-08_firmware to a higher version than 1.4.8.06,and avoid the version (,1.4.8.06); Upgrade cisco sf300-48p_firmware to a higher version than 1.4.8.06,and avoid the version (,1.4.8.06); Upgrade cisco sg300-10mp_firmware to a higher version than 1.4.8.06,and avoid the version (,1.4.8.06); Upgrade cisco sg300-10p_firmware to a higher version than 1.4.8.06,and avoid the version (,1.4.8.06); Upgrade cisco sg300-10_firmware to a higher version than 1.4.8.06,and avoid the version (,1.4.8.06); Upgrade cisco sg300-28p_firmware to a higher version than 1.4.8.06,and avoid the version (,1.4.8.06); Upgrade cisco sf300-24p_firmware to a higher version than 1.4.8.06,and avoid the version (,1.4.8.06); Upgrade cisco sf302-08mp_firmware to a higher version than 1.4.8.06,and avoid the version (,1.4.8.06); Upgrade cisco sg300-28_firmware to a higher version than 1.4.8.06,and avoid the version (,1.4.8.06); Upgrade cisco sf300-48_firmware to a higher version than 1.4.8.06,and avoid the version (,1.4.8.06); Upgrade cisco sg300-20_firmware to a higher version than 1.4.8.06,and avoid the version (,1.4.8.06); Upgrade cisco sf302-08p_firmware to a higher version than 1.4.8.06,and avoid the version (,1.4.8.06); Upgrade cisco sg300-52_firmware to a higher version than 1.4.8.06,and avoid the version (,1.4.8.06); Upgrade cisco sf300-24_firmware to a higher version than 1.4.8.06,and avoid the version (,1.4.8.06); Upgrade cisco sf302-08_firmware to a higher version than 1.4.8.06,and avoid the version (,1.4.8.06); Upgrade cisco sf300-24mp_firmware to a higher version than 1.4.8.06,and avoid the version (,1.4.8.06); Upgrade cisco sg300-10sfp_firmware to a higher version than 1.4.8.06,and avoid the version (,1.4.8.06); Upgrade cisco sg300-28mp_firmware to a higher version than 1.4.8.06,and avoid the version (,1.4.8.06); Upgrade cisco sg300-52p_firmware to a higher version than 1.4.8.06,and avoid the version (,1.4.8.06); Upgrade cisco sg300-52mp_firmware to a higher version than 1.4.8.06,and avoid the version (,1.4.8.06); Upgrade cisco sg500-28mpp_firmware to a higher version than 1.4.8.06,and avoid the version (,1.4.8.06); Upgrade cisco sg500-52mp_firmware to a higher version than 1.4.8.06,and avoid the version (,1.4.8.06); Upgrade cisco sg500xg-8f8t_firmware to a higher version than 1.4.8.06,and avoid the version (,1.4.8.06); Upgrade cisco sf500-24_firmware to a higher version than 1.4.8.06,and avoid the version (,1.4.8.06); Upgrade cisco sf500-24p_firmware to a higher version than 1.4.8.06,and avoid the version (,1.4.8.06); Upgrade cisco sf500-48_firmware to a higher version than 1.4.8.06,and avoid the version (,1.4.8.06); Upgrade cisco sf500-48p_firmware to a higher version than 1.4.8.06,and avoid the version (,1.4.8.06); Upgrade cisco sg500-28_firmware to a higher version than 1.4.8.06,and avoid the version (,1.4.8.06); Upgrade cisco sg500-28p_firmware to a higher version than 1.4.8.06,and avoid the version (,1.4.8.06); Upgrade cisco sg500-52_firmware to a higher version than 1.4.8.06,and avoid the version (,1.4.8.06); Upgrade cisco sg500-52p_firmware to a higher version than 1.4.8.06,and avoid the version (,1.4.8.06); Upgrade cisco sg500x-24_firmware to a higher version than 1.4.8.06,and avoid the version (,1.4.8.06); Upgrade cisco sg500x-24p_firmware to a higher version than 1.4.8.06,and avoid the version (,1.4.8.06); Upgrade cisco sg500x-48_firmware to a higher version than 1.4.8.06,and avoid the version (,1.4.8.06); Upgrade cisco sg500x-48p_firmware to a higher version than 1.4.8.06,and avoid the version (,1.4.8.06); Upgrade cisco esw2-350g-52_firmware to a higher version than 1.4.8.06,and avoid the version (,1.4.8.06); Upgrade cisco esw2-350g-52dc_firmware to a higher version than 1.4.8.06,and avoid the version (,1.4.8.06); Upgrade cisco esw2-550x-48_firmware to a higher version than 1.4.8.06,and avoid the version (,1.4.8.06); Upgrade cisco esw2-550x-48dc_firmware to a higher version than 1.4.8.06,and avoid the version (,1.4.8.06); Upgrade cisco sg350-10_firmware to a higher version than 2.3.0.130,and avoid the version (,2.3.0.130); Upgrade cisco sg350-10p_firmware to a higher version than 2.3.0.130,and avoid the version (,2.3.0.130); Upgrade cisco sg350-10mp_firmware to a higher version than 2.3.0.130,and avoid the version (,2.3.0.130); Upgrade cisco sg355-10p_firmware to a higher version than 2.3.0.130,and avoid the version (,2.3.0.130); Upgrade cisco sg350-28_firmware to a higher version than 2.3.0.130,and avoid the version (,2.3.0.130); Upgrade cisco sg350-28p_firmware to a higher version than 2.3.0.130,and avoid the version (,2.3.0.130); Upgrade cisco sg350-28mp_firmware to a higher version than 2.3.0.130,and avoid the version (,2.3.0.130); Upgrade cisco sf350-48_firmware to a higher version than 2.3.0.130,and avoid the version (,2.3.0.130); Upgrade cisco sf350-48p_firmware to a higher version than 2.3.0.130,and avoid the version (,2.3.0.130); Upgrade cisco sf350-48mp_firmware to a higher version than 2.3.0.130,and avoid the version (,2.3.0.130); Upgrade cisco sg350xg-2f10_firmware to a higher version than 2.3.0.130,and avoid the version (,2.3.0.130); Upgrade cisco sg350xg-24f_firmware to a higher version than 2.3.0.130,and avoid the version (,2.3.0.130); Upgrade cisco sg350xg-24t_firmware to a higher version than 2.3.0.130,and avoid the version (,2.3.0.130); Upgrade cisco sg350xg-48t_firmware to a higher version than 2.3.0.130,and avoid the version (,2.3.0.130); Upgrade cisco sg350x-24_firmware to a higher version than 2.3.0.130,and avoid the version (,2.3.0.130); Upgrade cisco sg350x-24p_firmware to a higher version than 2.3.0.130,and avoid the version (,2.3.0.130); Upgrade cisco sg350x-24mp_firmware to a higher version than 2.3.0.130,and avoid the version (,2.3.0.130); Upgrade cisco sg350x-48_firmware to a higher version than 2.3.0.130,and avoid the version (,2.3.0.130); Upgrade cisco sg350x-48p_firmware to a higher version than 2.3.0.130,and avoid the version (,2.3.0.130); Upgrade cisco sg350x-48mp_firmware to a higher version than 2.3.0.130,and avoid the version (,2.3.0.130); Upgrade cisco sx550x-16ft_firmware to a higher version than 2.3.0.130,and avoid the version (,2.3.0.130); Upgrade cisco sx550x-24ft_firmware to a higher version than 2.3.0.130,and avoid the version (,2.3.0.130); Upgrade cisco sx550x-12f_firmware to a higher version than 2.3.0.130,and avoid the version (,2.3.0.130); Upgrade cisco sx550x-24f_firmware to a higher version than 2.3.0.130,and avoid the version (,2.3.0.130); Upgrade cisco sx550x-24_firmware to a higher version than 2.3.0.130,and avoid the version (,2.3.0.130); Upgrade cisco sx550x-52_firmware to a higher version than 2.3.0.130,and avoid the version (,2.3.0.130); Upgrade cisco sg550x-24_firmware to a higher version than 2.3.0.130,and avoid the version (,2.3.0.130); Upgrade cisco sg550x-24p_firmware to a higher version than 2.3.0.130,and avoid the version (,2.3.0.130); Upgrade cisco sg550x-24mp_firmware to a higher version than 2.3.0.130,and avoid the version (,2.3.0.130); Upgrade cisco sg550x-24mpp_firmware to a higher version than 2.3.0.130,and avoid the version (,2.3.0.130); Upgrade cisco sg550x-48_firmware to a higher version than 2.3.0.130,and avoid the version (,2.3.0.130); Upgrade cisco sg550x-48p_firmware to a higher version than 2.3.0.130,and avoid the version (,2.3.0.130); Upgrade cisco sg550x-48mp_firmware to a higher version than 2.3.0.130,and avoid the version (,2.3.0.130); Upgrade cisco sf550x-24_firmware to a higher version than 2.3.0.130,and avoid the version (,2.3.0.130); Upgrade cisco sf550x-24p_firmware to a higher version than 2.3.0.130,and avoid the version (,2.3.0.130); Upgrade cisco sf550x-24mp_firmware to a higher version than 2.3.0.130,and avoid the version (,2.3.0.130); Upgrade cisco sf550x-48_firmware to a higher version than 2.3.0.130,and avoid the version (,2.3.0.130); Upgrade cisco sf550x-48p_firmware to a higher version than 2.3.0.130,and avoid the version (,2.3.0.130); Upgrade cisco sf550x-48mp_firmware to a higher version than 2.3.0.130,and avoid the version (,2.3.0.130)