Vulnerability Description
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.)
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Iofinnet | Tss-Lib | < 2.0.0 |
Related Weaknesses (CWE)
References
- https://github.com/IoFinnet/tss-lib/releases/tag/v2.0.0Release Notes
- https://github.com/bnb-chain/tss-lib/tree/v1.3.5Product
- https://gitlab.com/thorchain/tss/tss-lib/-/tags/v0.1.3Release Notes
- https://medium.com/%40iofinnet/security-disclosure-for-ecdsa-and-eddsa-threshold
- https://github.com/IoFinnet/tss-lib/releases/tag/v2.0.0Release Notes
- https://github.com/bnb-chain/tss-lib/tree/v1.3.5Product
- https://gitlab.com/thorchain/tss/tss-lib/-/tags/v0.1.3Release Notes
- https://medium.com/%40iofinnet/security-disclosure-for-ecdsa-and-eddsa-threshold
FAQ
What is CVE-2023-26556?
CVE-2023-26556 is a vulnerability with a CVSS score of 9.1 (CRITICAL). 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 (t...
How severe is CVE-2023-26556?
CVE-2023-26556 has been rated CRITICAL with a CVSS base score of 9.1/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2023-26556?
Check the references section above for vendor advisories and patch information. Affected products include: Iofinnet Tss-Lib.