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CVE-2020-36208 — Vulnerability in conquer-once — CVE Details

HIGH

conquer-once's OnceCell lacks Send bound for its Sync trait.

Published December 22, 2020Updated November 8, 2023Source: osv

Summary

Affected versions of `conquer-once` implements `Sync` for its `OnceCell` type without restricting it to `Send`able types. This allows non-`Send` but `Sync` types such as `MutexGuard` to be sent across threads leading to undefined behavior and memory corruption in concurrent programs. The issue was fixed by adding a `Send` constraint to `OnceCell`.

Advisory Timeline

  • First published December 22, 2020 (2120 days ago).
  • Last revised November 8, 2023 — 1051 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Cargo
Update conquer-once to 0.3.2 or later
cargo update -p conquer-once --precise 0.3.2

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

Affects 1 ecosystem: crates.io (1).

PackageEcosystemAffectedFixed In
conquer-once
crates.io
All versions0.3.2

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 7.8 score means for each attack dimension.

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

References

Frequently Asked Questions

What is CVE-2020-36208?
conquer-once's OnceCell lacks Send bound for its Sync trait. This vulnerability has been assigned a severity rating of HIGH (CVSS score: 7.8/10).
How do I check if my project is affected by CVE-2020-36208?
CVE-2020-36208 affects conquer-once. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2020-36208 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
7.8

High exploitability or significant impact. Prioritize remediation within days.

Also Known As

RUSTSEC-2020-0101
GHSA-3jc5-5hc5-33gj

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