CVE-2023-26556

Summary

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.)

Affected Software

Weaknesses

• n/a

ADP Enrichment

CVE Program Container

Additional 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

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: yes
  • Technical Impact: total

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

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