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Information Disclosure Affecting github.com/binance-chain/tss-lib/ecdsa/resharing package, versions <1.2.0

0.0
high

Snyk CVSS

    Attack Complexity Low
    Scope Changed
    Confidentiality High

    Threat Intelligence

    EPSS 0.15% (51st percentile)
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NVD
8.2 high

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  • Snyk ID SNYK-GOLANG-GITHUBCOMBINANCECHAINTSSLIBECDSARESHARING-567415
  • published 23 Apr 2020
  • disclosed 23 Apr 2020
  • credit Unknown
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Introduced: 23 Apr 2020

CVE-2020-12118 Open this link in a new tab
CWE-200 Open this link in a new tab

How to fix?

Upgrade github.com/binance-chain/tss-lib/ecdsa/resharing to version 1.2.0 or higher.

Overview

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 h1,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.