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.
History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2019-03-27T01:37:40

Updated: 2024-08-04T20:38:33.429Z

Reserved: 2019-01-29T00:00:00

Link: CVE-2019-7167

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2019-03-27T02:29:00.250

Modified: 2020-08-24T17:37:01.140

Link: CVE-2019-7167

cve-icon Redhat

No data.