| Package | Affected versions | Patched versions |
|---|---|---|
| github.com/binance-chain/tss-lib | < 2.0.0all versions | 2.0.0 |
| github.com/bnb-chain/tss-lib | < 2.0.0all versions | 2.0.0 |
| tss-lib | < 2.0.0 | 2.0.0 |
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.
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