公开(公告)号：US20200272738A1

公开(公告)日：2020-08-27

申请号：US16281527

申请日：2019-02-21

Applicant: Cisco Technology, Inc.

Inventor： Chirag Kiritkumar Shroff ,  Dylan Thomas Walker ,  Gregory Michael Schnorr ,  Gregory James Waldschmidt

IPC: G06F21/57 ,  G06F8/65 ,  G06F12/14 ,  G06F13/42

Abstract: A firmware protection module implements a hybrid firmware protection scheme on a computing device. The firmware protection module intercepts a message from a processor to a memory of the computing device. The message includes a command and an address in the memory corresponding to a firmware module stored in the module. The firmware protection module determines whether the command in the message is prohibited and whether the address in the message is protected. Responsive to a determination that the command is prohibited and the address is protected, the firmware protection module prevents at least a portion of the message from reaching the memory.

公开(公告)号：US11580226B2

公开(公告)日：2023-02-14

申请号：US16281527

申请日：2019-02-21

Applicant: Cisco Technology, Inc.

Inventor： Chirag Kiritkumar Shroff ,  Dylan Thomas Walker ,  Gregory Michael Schnorr ,  Gregory James Waldschmidt

IPC: G06F21/57 ,  G06F8/65 ,  G06F12/14 ,  G06F13/42 ,  G06F11/14 ,  G06F21/52

Abstract: A firmware protection module implements a hybrid firmware protection scheme on a computing device. The firmware protection module intercepts a message from a processor to a memory of the computing device. The message includes a command and an address in the memory corresponding to a firmware module stored in the module. The firmware protection module determines whether the command in the message is prohibited and whether the address in the message is protected. Responsive to a determination that the command is prohibited and the address is protected, the firmware protection module prevents at least a portion of the message from reaching the memory.