description: 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.
metrics:
cvssV3_1: [
version: 3.1
vectorString: CVSS:3.1/AC:H/AV:P/A:N/C:H/I:N/PR:H/S:U/UI:N
attackVector: PHYSICAL
attackComplexity: HIGH
privilegesRequired: HIGH
userInteraction: NONE
scope: UNCHANGED
confidentialityImpact: HIGH
integrityImpact: NONE
availabilityImpact: NONE
baseScore: 3.8
baseSeverity: LOW
]