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  5. CVE-2021-38194

CVE-2021-38194: Calculation error in ark-r1cs-std

August 25, 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.

References

  • github.com/advisories/GHSA-qj3v-q2vj-4c8h
  • github.com/arkworks-rs/r1cs-std
  • github.com/arkworks-rs/r1cs-std/commit/47ddbaa411afe7c499311a248a38135e5a192b67
  • github.com/arkworks-rs/r1cs-std/pull/70
  • nvd.nist.gov/vuln/detail/CVE-2021-38194
  • raw.githubusercontent.com/rustsec/advisory-db/main/crates/ark-r1cs-std/RUSTSEC-2021-0075.md
  • rustsec.org/advisories/RUSTSEC-2021-0075.html

Code Behaviors & Features

Detect and mitigate CVE-2021-38194 with GitLab Dependency Scanning

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Affected versions

All versions starting from 0.2.0 before 0.3.1

Fixed versions

  • 0.3.1

Solution

Upgrade to version 0.3.1 or above.

Impact 9.8 CRITICAL

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

Learn more about CVSS

Weakness

  • CWE-682: Incorrect Calculation

Source file

cargo/ark-r1cs-std/CVE-2021-38194.yml

Spotted a mistake? Edit the file on GitLab.

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