CVE:CVE-2021-35979
CNNVD:CNNVD-202110-486
Digi RealPort是一种专有的 Serial-over-LAN 封装协议。它通过将 ICS 协议数据封装在基于 TCP 的协议中，为网络上任何地方的串行设备提供虚拟连接。
Digi RealPort 4.8.488.0之前版本存在访问控制错误漏洞，该漏洞源于软件的 encrypted 模式容易受到中间人攻击，而且不进行身份验证。
solution:Upgrade digi realport to a higher version than 1.9-40,4.8.488.0,and avoid the version (,1.9-40],(,4.8.488.0]; Upgrade digi connectport_ts_8/16_firmware to a higher version than *; Upgrade digi connectport_lts_8/16/32_firmware to a higher version than *; Upgrade digi passport_integrated_console_server_firmware to a higher version than *; Upgrade digi cm_firmware to a higher version than *; Upgrade digi portserver_ts_firmware to a higher version than *; Upgrade digi portserver_ts_mei_firmware to a higher version than *; Upgrade digi portserver_ts_mei_hardened_firmware to a higher version than *; Upgrade digi portserver_ts_m_mei_firmware to a higher version than *; Upgrade digi 6350-sr_firmware to a higher version than *; Upgrade digi portserver_ts_p_mei_firmware to a higher version than *; Upgrade digi transport_wr11_xt_firmware to a higher version than *; Upgrade digi one_iap_family_firmware to a higher version than *; Upgrade digi one_ia_firmware to a higher version than *; Upgrade digi wr31_firmware to a higher version than *; Upgrade digi wr44_r_firmware to a higher version than *; Upgrade digi connect_es_firmware to a higher version than *; Upgrade digi wr21_firmware to a higher version than *