Description
Trezor Safe 3, Safe 5, and Safe 7 firmware contains a confirmation-binding flaw in the Ethereum sign_tx / sign_tx_eip1559 flow. For contract interactions, the device confirms only the initial calldata chunk while the signature commits to the full streamed calldata. An attacker could present calldata to a victim then supply a different tail that changes the signed transaction. Fixed in 70c9b0c.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Trezor Safe 3
Default version status: unknown
0 to < 70c9b0caffected70c9b0cunaffected
Trezor Safe 7
Default version status: unknown
0 to < 70c9b0caffected70c9b0cunaffected
Trezor Safe 5
Default version status: unknown
0 to < 70c9b0caffected70c9b0cunaffected