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CVE-2021-31616

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Date: May 6, 2021

Insufficient length checks in the ShapeShift KeepKey hardware wallet firmware before 7.1.0 allow a stack buffer overflow via crafted messages. The overflow in ethereum_extractThorchainSwapData() in ethereum.c can circumvent stack protections and lead to code execution. The vulnerable interface is reachable remotely over WebUSB.

Language: C

Severity Score

Related Resources (6)

https://blog.inhq.net/posts/keepkey-CVE-2021-31616/
https://github.com/keepkey/keepkey-firmware/commit/e49d45594002d4d3fbc1f03488e6dfc0a0a65836
https://github.com/keepkey/keepkey-firmware/releases/tag/v7.1.0
https://shapeshift.com/library/keepkey-important-update-issued-april-4-required
https://nvd.nist.gov/vuln/detail/CVE-2021-31616
https://www.mend.io/vulnerability-database/CVE-2021-31616

Severity Score

Weakness Type (CWE)

Out-of-bounds Write

CWE-787

Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

CWE-120

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): REQUIRED
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH

CVSS v2

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

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