Vulnerability Details : CVE-2023-26556
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.)
Products affected by CVE-2023-26556
- cpe:2.3:a:iofinnet:tss-lib:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2023-26556
0.13%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 49 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2023-26556
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
9.1
|
CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
3.9
|
5.2
|
NIST |
CWE ids for CVE-2023-26556
-
The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor, which exposes security-relevant information about the state of the product, such as whether a particular operation was successful or not.Assigned by: nvd@nist.gov (Primary)
References for CVE-2023-26556
-
https://gitlab.com/thorchain/tss/tss-lib/-/tags/v0.1.3
v0.1.3 · Tags · THORChain / THORChain TSS / tss-lib · GitLabRelease Notes
-
https://medium.com/@iofinnet/security-disclosure-for-ecdsa-and-eddsa-threshold-signature-schemes-4e969af7155b
Security disclosure for ECDSA and EdDSA threshold signature schemes | by io.finnet | Mar, 2023 | MediumNot Applicable;Third Party Advisory
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https://github.com/bnb-chain/tss-lib/tree/v1.3.5
GitHub - bnb-chain/tss-lib at v1.3.5Product
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https://github.com/IoFinnet/tss-lib/releases/tag/v2.0.0
Release v2.0.0 · IoFinnet/tss-lib · GitHubRelease Notes
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