Buffer Overflow Affecting keepkey/keepkey-firmware package, versions [,7.7.0)


Severity

Recommended
0.0
low
0
10

CVSS assessment by Snyk's Security Team. Learn more

Threat Intelligence

Exploit Maturity
Proof of Concept
EPSS
0.04% (11th percentile)

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  • Snyk IDSNYK-UNMANAGED-KEEPKEYKEEPKEYFIRMWARE-5491471
  • published3 May 2023
  • disclosed3 May 2023
  • creditChristian Reitter

Introduced: 3 May 2023

CVE-2023-27892  (opens in a new tab)
CWE-120  (opens in a new tab)

How to fix?

Upgrade keepkey/keepkey-firmware to version 7.7.0 or higher.

Overview

Affected versions of this package are vulnerable to Buffer Overflow due to insufficient length checks, via a crafted messages. Flaws in the cf_confirmExecTx() method in ethereum_contracts.c file 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 Base Scores

version 3.1