CVE-2023-26557

2023-04-2100:00:00

mitre

www.cve.org

vulnerability

timing side-channel

private key

lambda value

go big.int

crypto

paillier

modular exponentiation

timing leak

cve-2023-26557

tss-lib

0.001 Low

EPSS

Percentile

46.1%

JSON

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.)