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MitreCVE-2023-26556

HistoryApr 21, 2023 - 6:15 p.m.

CVE-2023-26556

2023-04-2118:15:07

CWE-203

mitre

web.nvd.nist.gov

cve-2023-26556

information security

secret key leak

timing side-channel attack

io.finnet tss-lib

CVSS3

9.1

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

NONE

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

AI Score

Confidence

High

EPSS

0.001

Percentile

46.4%

JSON

io.finnet tss-lib before 2.0.0 can leak a secret key via a timing side-channel attack because it relies on the scalar-multiplication implementation in Go crypto/elliptic, which is not constant time (there is an if statement in a loop). One leak is in ecdsa/keygen/round_2.go. (bnb-chain/tss-lib and thorchain/tss are also affected.)

Affected configurations

Nvd

Node

iofinnettss-libRange<2.0.0

VendorProductVersionCPE
iofinnettss-lib*cpe:2.3:a:iofinnet:tss-lib:*:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
iofinnet	tss-lib	*	cpe:2.3:a:iofinnet:tss-lib::::::::

References

github.com/bnb-chain/tss-lib/tree/v1.3.5

github.com/IoFinnet/tss-lib/releases/tag/v2.0.0

gitlab.com/thorchain/tss/tss-lib/-/tags/v0.1.3

medium.com/%40iofinnet/security-disclosure-for-ecdsa-and-eddsa-threshold-signature-schemes-4e969af7155b

CVSS3

9.1

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

NONE

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

AI Score

Confidence

High

EPSS

0.001

Percentile

46.4%

JSON

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