Vulnerability 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.)
CVSS Score
HIGH
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-2023-26557?
CVE-2023-26557 is a vulnerability with a CVSS score of 7.5 (HIGH). 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, ...
How severe is CVE-2023-26557?
CVE-2023-26557 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2023-26557?
Check the references section above for vendor advisories and patch information. Affected products include: Iofinnet Tss-Lib.