Insufficient length checks in the ShapeShift KeepKey hardware wallet firmware before 7.7.0 allow a global buffer overflow via crafted messages. Flaws in cf_confirmExecTx() in ethereum_contracts.c can be used to reveal arbitrary microcontroller memory on the device screen or crash the device. With physical access to a PIN-unlocked device, attackers can extract the BIP39 mnemonic secret from the hardware wallet.
CVSS Details
- CVSS 3.1 Base Score: 3.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H)
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