CVE-2019-14356

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Summary

CVECVE-2019-14356
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2019-10-31 18:15:00 UTC
Updated2023-11-07 03:04:00 UTC
Description** DISPUTED ** 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.

Risk And Classification

Problem Types: CWE-203

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Hardware Coinkite Coldcard Mk1 - All All All
Hardware Coinkite Coldcard Mk1 - All All All
Operating System Coinkite Coldcard Mk1 Firmware All All All All
Operating System Coinkite Coldcard Mk1 Firmware All All All All
Hardware Coinkite Coldcard Mk2 - All All All
Hardware Coinkite Coldcard Mk2 - All All All
Operating System Coinkite Coldcard Mk2 Firmware All All All All
Operating System Coinkite Coldcard Mk2 Firmware All All All All

References

ReferenceSourceLinkTags
hardware-bitcoin-wallet/ssd1306.c at master · someone42/hardware-bitcoin-wallet · GitHub MISC github.com Exploit, Third Party Advisory
Possible Information Leak, Considered Unlikely | COINKITE Blog MISC blog.coinkite.com Patch, Vendor Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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