CVE-2019-7167

Name: CVE-2019-7167
Creator: NVD / NIST
Published: 2019-03-27T02:29:00.25+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.70%

Last modified Jun 17, 2026

CVE-2019-7167 is a vulnerability of currently unknown severity. 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. EPSS estimates a 1.70% chance of exploitation in the next 30 days.

Description

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.

Metrics

EPSS Probability

1.70%

74.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-754

Affected Software

Vendor	Product	Versions
Z.Cash	Zcash	<= 2.0.1

References

http://fortune.com/2019/02/05/zcash-vulnerability-cryptocurrency/Press/Media Coverage, Third Party Advisory
https://github.com/JinBean/CVE-Extension
https://z.cash/blog/zcash-counterfeiting-vulnerability-successfully-remediated/Vendor Advisory
http://fortune.com/2019/02/05/zcash-vulnerability-cryptocurrency/Press/Media Coverage, Third Party Advisory
https://github.com/JinBean/CVE-Extension
https://z.cash/blog/zcash-counterfeiting-vulnerability-successfully-remediated/Vendor Advisory

Timeline

Published: Mar 27, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-7167?

How severe is CVE-2019-7167?

Severity scoring for CVE-2019-7167 is pending analysis. The EPSS model estimates a 1.70% probability of exploitation in the next 30 days.

How do I fix CVE-2019-7167?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-7167?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST