Design/Logic Flaw

2020-06-1618:15:00

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6.4 Medium

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

32.5%

JSON

BIP-143 in the Bitcoin protocol specification mishandles the signing of a Segwit transaction, which allows attackers to trick a user into making two signatures in certain cases, potentially leading to a huge transaction fee. NOTE: this affects all hardware wallets. It was fixed in 1.9.1 for the Trezor One and 2.3.1 for the Trezor Model T.

CPENameOperatorVersion
trezor_model_t_firmwarelt2.3.1
trezor_one_firmwarelt1.9.1

CPE	Name	Operator	Version
	trezor_model_t_firmware	lt	2.3.1
	trezor_one_firmware	lt	1.9.1

References

blog.trezor.io/details-of-firmware-updates-for-trezor-one-version-1-9-1-and-trezor-model-t-version-2-3-1-1eba8f60f2dd