RUSTSEC-2021-0075
Flaw in FieldVar::mul_by_inverse allows unsound R1CS constraint systems
- Reported
- Issued
- Package
- ark-r1cs-std (crates.io)
- Type
- Vulnerability
- Categories
- Keywords
- #r1cs #zksnark #arkworks
- Aliases
- References
- Patched
-
>=0.3.1
- Affected Functions
- Version
ark_r1cs_std::FieldVar::mul_by_inverse-
<0.3.0
Description
Versions 0.2.0 to 0.3.0 of ark-r1cs-std did not enforce any constraints in the FieldVar::mul_by_inverse method, allowing a malicious prover to produce an unsound proof that passes all verifier checks.
This method was used primarily in scalar multiplication for short_weierstrass::ProjectiveVar.
This bug was fixed in commit 47ddbaa, and was released as part of version 0.3.1 on crates.io.
Advisory available under CC0-1.0 license.