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CVE-2021-38194

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Date: August 8, 2021

An issue was discovered in the ark-r1cs-std crate before 0.3.1 for Rust. It does not enforce any constraints in the FieldVar::mul_by_inverse method. Thus, a prover can produce a proof that is unsound but is nonetheless verified.

Language: RUST

Severity Score

Related Resources (8)

https://rustsec.org/advisories/RUSTSEC-2021-0075.html
https://github.com/arkworks-rs/r1cs-std/commit/47ddbaa411afe7c499311a248a38135e5a192b67
https://github.com/arkworks-rs/r1cs-std
https://github.com/arkworks-rs/r1cs-std/pull/70
https://crates.io/crates/ark-r1cs-std
https://nvd.nist.gov/vuln/detail/CVE-2021-38194
https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/ark-r1cs-std/RUSTSEC-2021-0075.md
https://www.mend.io/vulnerability-database/CVE-2021-38194

Severity Score

Weakness Type (CWE)

Incorrect Calculation

CWE-682

Insufficient Information

NVD-CWE-noinfo

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): PARTIAL
Integrity (I): PARTIAL
Availability (A): PARTIAL
Additional information:

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