Description
io.finnet tss-lib before 2.0.0 can leak the lambda value of a private key via a timing side-channel attack because it relies on Go big.Int, which is not constant time for Cmp, modular exponentiation, or modular inverse. An example leak is in crypto/paillier/paillier.go. (bnb-chain/tss-lib and thorchain/tss are also affected.)
References (4)
Core 4
Core References
Various Sources
https://medium.com/%40iofinnet/security-disclosure-for-ecdsa-and-eddsa-threshold-signature-schemes-4e969af7155b
Release Notes
https://github.com/IoFinnet/tss-lib/releases/tag/v2.0.0
Release Notes
https://gitlab.com/thorchain/tss/tss-lib/-/tags/v0.1.3
Scores
CVSS v3
7.5
EPSS
0.0086
EPSS Percentile
53.8%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-203
Status
published
Products (3)
binance-chain/tss-lib
0 - 1.3.6-0.20230324145555-bb6fb30bd3ebGo
bnb-chain/tss-lib
0 - 1.3.6-0.20230324145555-bb6fb30bd3ebGo
iofinnet/tss-lib
< 2.0.0
Published
Apr 21, 2023
Tracked Since
Feb 18, 2026