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MitreCVE-2020-25082

HistoryAug 10, 2021 - 5:15 p.m.

CVE-2020-25082

2021-08-1017:15:07

CWE-203

mitre

web.nvd.nist.gov

nuvoton trusted platform module

npct75x

cve-2020-25082

elliptic curve cryptography

ecc private key

side-channel attack

observable timing discrepancy

nvd

CVSS2

1.9

Attack Vector

LOCAL

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:L/AC:M/Au:N/C:P/I:N/A:N

CVSS3

3.8

Attack Vector

PHYSICAL

Attack Complexity

HIGH

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

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

AI Score

4.1

Confidence

High

EPSS

Percentile

12.6%

JSON

An attacker with physical access to Nuvoton Trusted Platform Module (NPCT75x 7.2.x before 7.2.2.0) could extract an Elliptic Curve Cryptography (ECC) private key via a side-channel attack against ECDSA, because of an Observable Timing Discrepancy.

Affected configurations

Nvd

Node

nuvotonnpct75xMatch-

AND

nuvotonnpct75x_firmwareRange7.2.0–7.2.2.0

VendorProductVersionCPE
nuvotonnpct75x-cpe:2.3:h:nuvoton:npct75x:-:*:*:*:*:*:*:*
nuvotonnpct75x_firmware*cpe:2.3:o:nuvoton:npct75x_firmware:*:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
nuvoton	npct75x	-	cpe:2.3:h:nuvoton:npct75x:-:::::::*
nuvoton	npct75x_firmware	*	cpe:2.3:o:nuvoton:npct75x_firmware::::::::

References

www.nuvoton.com/support/product-related-information/security-advisories/sa-002/

CVSS2

1.9

Attack Vector

LOCAL

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:L/AC:M/Au:N/C:P/I:N/A:N

CVSS3

3.8

Attack Vector

PHYSICAL

Attack Complexity

HIGH

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

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

AI Score

4.1

Confidence

High

EPSS

Percentile

12.6%

JSON

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