Vulnerability Information
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Vulnerability Title
gnark's Groth16 commitment extension unsound for more than one commitment
Vulnerability Description
gnark is a fast zk-SNARK library that offers a high-level API to design circuits. Versions prior to 0.11.0 have a soundness issue - in case of multiple commitments used inside the circuit the prover is able to choose all but the last commitment. As gnark uses the commitments for optimized non-native multiplication, lookup checks etc. as random challenges, then it could impact the soundness of the whole circuit. However, using multiple commitments has been discouraged due to the additional cost to the verifier and it has not been supported in the recursive in-circuit Groth16 verifier and Solidity verifier. gnark's maintainers expect the impact of the issue be very small - only for the users who have implemented the native Groth16 verifier or are using it with multiple commitments. We do not have information of such users. The issue has been patched in version 0.11.0. As a workaround, users should follow gnark maintainers' recommendation to use only a single commitment and then derive in-circuit commitments as needed using the `std/multicommit` package.
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Vulnerability Type
信息暴露
Vulnerability Title
gnark 安全漏洞
Vulnerability Description
gnark是Consensys开源的一个快速的 zk-SNARK 库。供高级 API 来设计电路。 gnark 0.11.0之前版本存在安全漏洞，该漏洞源于在电路中使用多个承诺时，证明者能够选择除最后一个承诺之外的所有承诺，这可能影响整个电路的健全性。
CVSS Information
N/A
Vulnerability Type
N/A