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Advisories

Ledger Nano X, Flex, Stax MCU Firmware Update Denial of Service

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severity
medium
date
Affecting

  • Ledger Nano X < 2.4.2

  • Ledger Flex < 1.2.2

  • Ledger Stax < 1.6.2

CWE
  • CWE-1284 Improper Validation of Specified Quantity in Input
CVSS
5.7
CVSS V4 Vector
CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Credit
Guanxing Wen, VulnCheck
Description
Ledger Nano X, Flex, and Stax devices contain a denial of service vulnerability in the MCU firmware update process due to missing validation of the reset_handler parameter during firmware flashing. An attacker can provide a crafted reset_handler address pointing to invalid memory or attacker-controlled code to cause the device to enter an unrecoverable fault state during boot, resulting in permanent loss of operability.

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