CVE-2019-14356 Information

Description

LICENSE README.md cvefilelist cvelist nvdcve nvdpages.sh scripts test-CVE-2017-1882.markdown test-CVE-2017-18822.markdown tmpvendorlinks DISPUTED LICENSE README.md cvefilelist cvelist nvdcve nvdpages.sh scripts test-CVE-2017-1882.markdown test-CVE-2017-18822.markdown tmpvendorlinks On Coldcard MK1 and MK2 devices a side channel for the row-based OLED display was found. The power consumption of each row-based display cycle depends on the number of illuminated pixels allowing a partial recovery of display contents. For example a hardware implant in the USB cable might be able to leverage this behavior to recover confidential secrets such as the PIN and BIP39 mnemonic. In other words the side channel is relevant only if the attacker has enough control over the device’s USB connection to make power-consumption measurements at a time when secret data is displayed. The side channel is not relevant in other circumstances such as a stolen device that is not currently displaying secret data. On Coldcard MK1 and MK2 devices a side channel for the row-based OLED display was found. The power consumption of each row-based display cycle depends on the number of illuminated pixels allowing a partial recovery of display contents. For example a hardware implant in the USB cable might be able to leverage this behavior to recover confidential secrets such as the PIN and BIP39 mnemonic. In other words the side channel is relevant only if the attacker has enough control over the device’s USB connection to make power-consumption measurements at a time when secret data is displayed. The side channel is not relevant in other circumstances such as a stolen device that is not currently displaying secret data. NOTE: At Coinkite we’ve already mitigated it even though we feel strongly that it is not a legitimate issue. In our opinion it is both unproven (might not even work) and also completely impractical—even if it could be made to work perfectly.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Reference

https://blog.coinkite.com/noise-troll/ https://github.com/someone42/hardware-bitcoin-wallet/blob/master/pic32/ssd1306.c

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

LOW

Availability Impact

NONE

Base Score

NONE

Base Severity

5.3