What is CVE-2020-14199?

CVE-2020-14199 is a medium-severity vulnerability in Satoshilabs Trezor Model T, classified under Improper Verification of Cryptographic Signature. CVSS score: 6.5/10. Published 2020-06-16.

How severe is CVE-2020-14199?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Is CVE-2020-14199 known to be exploited?

8 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Satoshilabs Trezor Model T

CVE-2020-14199

BIP-143 in the Bitcoin protocol specification mishandles the signing of a Segwit transaction, which allows attackers to trick a user into making two signatures in certain cases, potentially leading to a huge transaction fee. NOTE: this affects all hardware wallets. It was fixed in 1.9.1 for the Trezor One and 2.3.1 for the Trezor Model T.

EPSS: 0.008 (54.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N.

Affected products

Weakness classification (CWE)

CWE-347 — Improper Verification of Cryptographic Signature

Public proof-of-concept exploits

References

cve@mitre.org (Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2020-14199?: CVE-2020-14199 is a medium-severity vulnerability in Satoshilabs Trezor Model T, classified under Improper Verification of Cryptographic Signature. CVSS score: 6.5/10. Published 2020-06-16.
How severe is CVE-2020-14199?: Medium severity. CVSS v3 base score is 6.5 out of 10.
Is CVE-2020-14199 known to be exploited?: 8 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.