Published: 16/06/2020 Updated: 23/06/2020
CVSS v2 Base Score: 4.3 | Impact Score: 2.9 | Exploitability Score: 8.6
Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N

Vulnerability Summary

BIP-143 in the Bitcoin protocol specification mishandles the signing of a Segwit transaction, which allows malicious users 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.

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