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Security Database

CVE

CWE

Training

CVE-2023-44378

Published: Oct 9, 2023

Modified: Sep 19, 2024

PUBLISHED

CVSS v3.1

7.1

HIGH

Description

gnark is a zk-SNARK library that offers a high-level API to design circuits. Prior to version 0.9.0, for some in-circuit values, it is possible to construct two valid decomposition to bits. In addition to the canonical decomposition of `a`, for small values there exists a second decomposition for `a+r` (where `r` is the modulus the values are being reduced by). The second decomposition was possible due to overflowing the field where the values are defined. Upgrading to version 0.9.0 should fix the issue without needing to change the calls to value comparison methods.

Vendor	Product	Versions
Consensys	gnark	affected `< 0.9.0`

Weaknesses (CWE)

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

None

Integrity

High

Availability

None

References

https://github.com/Consensys/gnark/security/advisories/GHSA-498w-5j49-vqjg

x_refsource_CONFIRM

https://github.com/zkopru-network/zkopru/issues/116

x_refsource_MISC

https://github.com/Consensys/gnark/commit/59a4087261a6c73f13e80d695c17b398c3d0934f

x_refsource_MISC

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