CVE-2023-26557

CVSS 7.5 HIGHEPSS 0.9%CWE-203

Vexday Risk Score

21Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 7.5EPSS 0.9%KEV nãoPoC —Patch —

Lifecycle

21 Apr 2023Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.)

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

Affected products

n/a · n/a

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References

https://github.com/bnb-chain/tss-lib/tree/v1.3.5 https://github.com/IoFinnet/tss-lib/releases/tag/v2.0.0 https://gitlab.com/thorchain/tss/tss-lib/-/tags/v0.1.3 https://medium.com/%40iofinnet/security-disclosure-for-ecdsa-and-eddsa-threshold-signature-schemes-4e969af7155b