CVE:CVE-2021-36767
CNNVD:CNNVD-202110-488
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存在安全漏洞，攻击者可利用该漏洞向服务器发送未经身份验证的请求，服务器将用服务器访问密码的弱散列版本进行应答，攻击者可利用该漏洞可能会脱机破解进而成功登录到服务器。
solution:Upgrade digi realport to a higher version than 1.9-40,4.10.490,and avoid the version (,1.9-40],(,4.10.490]; 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_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 *; Upgrade digi one_iap_firmware to a higher version than *; Upgrade digi one_iap_haz_firmware to a higher version than *; Upgrade digi connectcore_8x_sbc_pro_firmware to a higher version than *; Upgrade digi connectcore_8x_som_dualxz_firmware to a higher version than *; Upgrade digi connectcore_8x_som_quadxplus_firmware to a higher version than *