CVE-2019-7167

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.

CVSS v3 7.5 HIGH
CVSS v2.0 5.0 MEDIUM

7.5^/10

CVSS v3 : HIGH

Vector : AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

5.0^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:L/Au:N/C:N/I:P/A:N

Exploitability : 10.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact PARTIAL

Availability Impact NONE

References

Link	Resource
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

Configurations

Configuration 1 (hide)

cpe:2.3:a:z.cash:zcash:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2019-03-27 02:29

Updated : 2024-02-28 17:08

NVD link : CVE-2019-7167

Mitre link : CVE-2019-7167

CVE.ORG link : CVE-2019-7167

JSON object : View

Products Affected

z.cash

zcash

CWE

CWE-754

Improper Check for Unusual or Exceptional Conditions

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