CVE:CVE-2020-8341
CNNVD:CNNVD-202009-073
Lenovo ThinkPad是联想（Lenovo）的一个便携式计算机。
在Lenovo系统中，SMM BIOS Write Protection用于防止写入SPI Flash。尽管这提供了足够的保护，但SPI保护范围寄存器（PRx）提供了额外的保护层。在某些Lenovo ThinkPad系统版本的BIOS中从S3睡眠模式恢复后，并未设置PRx。这会影响SMM BIOS Write Protection，从而导致系统不受保护。
solution:Upgrade lenovo thinkpad_t490_(20nx)_firmware to a higher version than n2iet90w,and avoid the version (,n2iet90w); Upgrade lenovo thinkpad_t490_(20qx)_firmware to a higher version than n2iet90w,and avoid the version (,n2iet90w); Upgrade lenovo thinkpad_t490_(20rx)_firmware to a higher version than n2ret16w,and avoid the version (,n2ret16w); Upgrade lenovo thinkpad_t490s_(20nx)_firmware to a higher version than n2jet89w,and avoid the version (,n2jet89w); Upgrade lenovo thinkpad_t495_drift_firmware to a higher version than 2020-08-30,and avoid the version (,2020-08-30); Upgrade lenovo thinkpad_t590_(20nx)_firmware to a higher version than n2iet90w,and avoid the version (,n2iet90w); Upgrade lenovo thinkpad_x1_carbon_(20qx)_firmware to a higher version than n2het54w,and avoid the version (,n2het54w); Upgrade lenovo thinkpad_x1_yoga_(20qx)_firmware to a higher version than n2het54w,and avoid the version (,n2het54w); Upgrade lenovo thinkpad_x390_(20qx)_firmware to a higher version than n2jet89w,and avoid the version (,n2jet89w); Upgrade lenovo thinkpad_x390_(20sx)_firmware to a higher version than n2set18w,and avoid the version (,n2set18w)