CVE-2023-26557

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.)

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.14%
Affected: n/a n/a
Published at:
Updated at:

References

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

Frequently Asked Questions

What is the severity of CVE-2023-26557?
CVE-2023-26557 has been scored as a high severity vulnerability.
How to fix CVE-2023-26557?
To fix CVE-2023-26557, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-26557 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-26557 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.