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CVE-2019-18672

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Date: December 6, 2019

Insufficient checks in the finite state machine of the ShapeShift KeepKey hardware wallet before firmware 6.2.2 allow a partial reset of cryptographic secrets to known values via crafted messages. Notably, this breaks the security of U2F for new server registrations and invalidates existing registrations. This vulnerability can be exploited by unauthenticated attackers and the interface is reachable via WebUSB.

Language: C

Severity Score

Related Resources (6)

https://blog.inhq.net/posts/keepkey-CVE-2019-18672/
https://medium.com/shapeshift-stories/keepkey-release-notes-v-6f7d2ec78065
https://medium.com/shapeshift-stories/shapeshift-security-update-8ec89bb1b4e3
https://github.com/keepkey/keepkey-firmware/commit/769714fcb569e7a4faff9530a2d9ac1f9d6e5680
https://nvd.nist.gov/vuln/detail/CVE-2019-18672
https://www.mend.io/vulnerability-database/CVE-2019-18672

Severity Score

Weakness Type (CWE)

Improper Validation of Integrity Check Value

CWE-354

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): HIGH
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): PARTIAL
Availability (A): NONE
Additional information:

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