CVE-2019-7167

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    CVE-2019-7167

    Published: 27 Mar 2019Last Modified: 7 Aug 2026

    Summary:

    Details: Zcash, before the Sapling network upgrade (2018-10-28), had a counterfeiting vulnerability. A key-generation process, during evaluation of polynomials related to a to-be-proven statement, produced certain bypass elements. Availability of these elements allowed a cheating prover to bypass a consistency check, and consequently transform the proof of one statement into an ostensibly valid proof of a different statement, thereby breaking the soundness of the proof system. This misled the original Sprout zk-SNARK verifier into accepting the correctness of a transaction.

    References: http://fortune.com/2019/02/05/zcash-vulnerability-cryptocurrency/, https://z.cash/blog/zcash-counterfeiting-vulnerability-successfully-remediated/, https://github.com/JinBean/CVE-Extension

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    v2.0.1
    v2.0.1-rc1
    v2.0.0
    v2.0.0-rc1

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2019-7167 | CVE-DB