[Gnuk-users] Gnuk and possible hardware vulnerability

NIIBE Yutaka gniibe at fsij.org
Wed Aug 23 23:49:30 UTC 2017

Aurelien Jarno <aurelien at aurel32.net> wrote:
> It seems that the protection has been improved on the STM32 F1 series.

IIRC, STM32F1 is older than STM32F0.  I'm sure the design of Cortex-M3
is older than Cortex-M0.

I checked the timeline [0].  Yes, STM32F1 is the oldest implementation
by STMicroelectronics.

> All that said the article suggests to check the RDP value at the
> beginning of the boot and set enable the memory protection if it is not
> done.

I don't know if this makes sense.  When incorrect RDP value is detected,
the content of flash ROM might be already taken *before* that check,
being connected SWD debugger.

Well, it's good if user can see the status of the protection.

[0] https://en.wikipedia.org/wiki/STM32#History

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