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CVE-2020-36442 — Vulnerability in beef — CVE Details

HIGH

beef::Cow lacks a Sync bound on its Send trait allowing for data races

Published October 28, 2020Updated November 8, 2023Source: osv

Summary

Affected versions of this crate did not have a `T: Sync` bound in the `Send` impl for `Cow<'_, T, U>`. This allows users to create data races by making `Cow` contain types that are (Send && !Sync) like `Cell<_>` or `RefCell<_>`. Such data races can lead to memory corruption. The flaw was corrected in commit d1c7658 by adding trait bounds `T: Sync` and `T::Owned: Send` to the `Send` impl for `Cow<'_, T, U>`.

Advisory Timeline

  • First published October 28, 2020 (2175 days ago).
  • Last revised November 8, 2023 — 1106 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Cargo
Update beef to 0.5.0 or later
cargo update -p beef --precise 0.5.0

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

Affected Packages (1)

Affects 1 ecosystem: crates.io (1).

PackageEcosystemAffectedFixed In
beef
crates.io
All versions0.5.0

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 8.1 score means for each attack dimension.

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

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

References

Frequently Asked Questions

What is CVE-2020-36442?
beef::Cow lacks a Sync bound on its Send trait allowing for data races This vulnerability has been assigned a severity rating of HIGH (CVSS score: 8.1/10).
How do I check if my project is affected by CVE-2020-36442?
CVE-2020-36442 affects beef. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2020-36442 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
8.1

High exploitability or significant impact. Prioritize remediation within days.

Also Known As

RUSTSEC-2020-0122
GHSA-m7w4-8wp8-m2xq

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