high7.5
CVE-2019-7167
Zcash, before the Sapling network upgrade (2018-10-28), had a counterfeiting vulnerability.
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Z.Cash | Zcash | through 2.0.1 |
Weakness classification
References
- NVD record
- CVE.org record
- http://fortune.com/2019/02/05/zcash-vulnerability-cryptocurrency/
- https://github.com/JinBean/CVE-Extension
- https://z.cash/blog/zcash-counterfeiting-vulnerability-successfully-remediated/
- http://fortune.com/2019/02/05/zcash-vulnerability-cryptocurrency/
- https://github.com/JinBean/CVE-Extension
- https://z.cash/blog/zcash-counterfeiting-vulnerability-successfully-remediated/