Information Disclosure Affecting github.com/binance-chain/tss-lib/ecdsa/resharing package, versions <1.2.0
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23 Apr 2020
23 Apr 2020
How to fix?
github.com/binance-chain/tss-lib/ecdsa/resharing to version 1.2.0 or higher.
github.com/binance-chain/tss-lib/ecdsa/resharing is an ECDSA key resharing module for tss-lib.
Affected versions of this package are vulnerable to Information Disclosure. It is possible for a malicious actor to generate bad parameters
h2 that are shared with other parties during keygen. This allowed such an actor to compromise signing rounds and potentially expose the private data of other parties.
Existing save data for signing groups that have already completed keygen should be considered secure if the parties were trusted at the time of keygen. This vulnerability could only have been exploited when a malicious actor with prior knowledge of this vulnerability had participated in keygen.