CVSS 3.1
9.1 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:NCVE-2023-26556
Critical (9.1) in iofinnet tss-lib. EPSS 0.9% chance of exploitation in the next 30 days. Fixed in github.com/bnb-chain/tss-lib 1.3.6-0.20230324145555-bb6fb30bd3eb, 2.0.0.
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.)
Severity
- EPSS
- 0.9% chance of exploitation in the next 30 days; higher than 58% of CVEs (scores of 2026-10-31)
- CWE
- CWE-203
- Published
- Modified
- Record from
- the NVD, synced
Affected
- iofinnet:tss-lib
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-3w84-4mjc-rjw7 | Go | github.com/bnb-chain/tss-lib | <2.0.0 | 2.0.0 |
| GHSA-3w84-4mjc-rjw7 | Go | github.com/binance-chain/tss-lib | <2.0.0 | 2.0.0 |
| GO-2023-1732 | Go | github.com/bnb-chain/tss-lib | <1.3.6-0.20230324145555-bb6fb30bd3eb | 1.3.6-0.20230324145555-bb6fb30bd3eb |
| GO-2023-1732 | Go | github.com/binance-chain/tss-lib | all versions | no fix published |
References
- https://github.com/IoFinnet/tss-lib/releases/tag/v2.0.0
- https://github.com/bnb-chain/tss-lib/tree/v1.3.5
- 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
- https://github.com/IoFinnet/tss-lib/releases/tag/v2.0.0