CVE:CVE-2021-41838
CNNVD:CNNVD-202202-112
Insyde InsydeH2O是中国台湾系微（Insyde）公司的一个 C 语言源，它实现了新技术“EFI/UEFI”规范，旨在取代传统的 BIOS（基本输入/输出系统）。
InsydeH2O Hardware-2-Operating System (H2O) UEFI固件存在安全漏洞，攻击者可以使用这个不安全的指针ptr来读取或写入或操作 SMRAM 中的数据。利用此漏洞可能会导致使用 SwSMI 处理程序仅为 SMM 保留的权限升级。
solution:Upgrade insyde insydeh2o to a higher version than 5.16.42,5.26.42,5.35.42,5.43.42,5.51.42,and avoid the version [5.1,5.16.42),[5.2,5.26.42),[5.3,5.35.42),[5.4,5.43.42),[5.5,5.51.42); Upgrade siemens simatic_field_pg_m5_firmware to a higher version than *; Upgrade siemens simatic_field_pg_m6_firmware to a higher version than *; Upgrade siemens simatic_ipc127e_firmware to a higher version than *; Upgrade siemens simatic_ipc227g_firmware to a higher version than *; Upgrade siemens simatic_ipc277g_firmware to a higher version than *; Upgrade siemens simatic_ipc327g_firmware to a higher version than *; Upgrade siemens simatic_ipc377g_firmware to a higher version than *; Upgrade siemens simatic_ipc427e_firmware to a higher version than *; Upgrade siemens simatic_ipc477e_firmware to a higher version than *; Upgrade siemens simatic_ipc627e_firmware to a higher version than *; Upgrade siemens simatic_ipc647e_firmware to a higher version than *; Upgrade siemens simatic_ipc677e_firmware to a higher version than *; Upgrade siemens simatic_ipc847e_firmware to a higher version than *; Upgrade siemens simatic_itp1000_firmware to a higher version than *