What’s Vulnerable › Vulnerabilities

CVE-2022-47930

• Severity: medium (CVSS 6.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-04-21 · updated 2026-06-17
• Weakness: CWE-294

Description

An issue was discovered in IO FinNet tss-lib before 2.0.0. The parameter ssid for defining a session id is not used through the MPC implementation, which makes replaying and spoofing of messages easier. In particular, the Schnorr proof of knowledge implemented in sch.go does not utilize a session id, context, or random nonce in the generation of the challenge. This could allow a malicious user or an eavesdropper to replay a valid proof sent in the past.

Affected products

• Iofinnet Tss-Lib: before 2.0.0 — fixed in 2.0.0

How to fix

Upgrade to a fixed version: Iofinnet Tss-Lib 2.0.0. Check the vendor advisory for mitigations.

References

• https://github.com/IoFinnet/tss-lib/releases/tag/v2.0.0
• https://medium.com/%40iofinnet/security-disclosure-for-ecdsa-and-eddsa-threshold-signature-schemes-4e969af7155b
• https://github.com/IoFinnet/tss-lib/releases/tag/v2.0.0
• https://medium.com/%40iofinnet/security-disclosure-for-ecdsa-and-eddsa-threshold-signature-schemes-4e969af7155b

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