CVE-2021-32810: Crossbeam deque Crossbeam-deque Data Race Before V0.7.4 Vulnerability

Q: What is CVE-2021-32810?

CVE-2021-32810 is a security vulnerability in Crossbeam deque involving crossbeam-deque Data Race before v0.7.4 and v0.8.1 under CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition').

Q: Which Crossbeam deque versions are affected?

Affected versions include releases prior to 0.7.4, 0.8.1 across affected packages: crossbeam-deque.

Q: What version fixes CVE-2021-32810?

Upgrading to 0.7.4, 0.8.1 (or the latest patched release for your respective branch) resolves the vulnerability.

Q: Is crossbeam-deque affected?

Yes, crossbeam-deque is affected in releases prior to 0.7.4, 0.8.1. Upgrade your dependency to 0.7.4, 0.8.1 or later.

Q: What is the CVSS score of CVE-2021-32810?

CVE-2021-32810 has a CVSS v3.1 base score of 9.8 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Q: What CWE is associated with CVE-2021-32810?

CVE-2021-32810 is classified under CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') (The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.).

Q: How can I check crates.io dependencies for CVE-2021-32810?

Run the dependency tree command: 'inspect dependencies for crossbeam-deque'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.

CRITICAL

Advisory Identifier: GHSA-pqqp-xmhj-wgcw

CVSS 9.8

CWE-362

Published 2021-08-25

Advisory Summary

CVE-2021-32810 is a CRITICAL (CVSS 9.8) crossbeam-deque data race before v0.7.4 vulnerability (CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')) affecting Crossbeam deque libraries in the crates.io ecosystem. The issue involves crossbeam-deque data race before v0.7.4 and v0.8.1. Remediation is available by upgrading affected packages to version 0.7.4, 0.8.1.

CVE-2021-32810 at a Glance

CVE Identifier CVE-2021-32810

GHSA Identifier GHSA-pqqp-xmhj-wgcw

Severity CRITICAL

CVSS v3.1 Base Score 9.8

CWE Classification CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Affected Product Crossbeam deque

Package Ecosystem crates.io

Published Date 2021-08-25

Last Updated 2022-08-10

Security Impact

CVSS: 9.8

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

Attack Vector Network (AV:N)

Attack Complexity Low (AC:L)

Privileges Required None (PR:N)

User Interaction None (UI:N)

Scope Unchanged (S:U)

Confidentiality High (C:H)

Integrity High (I:H)

Availability High (A:H)

How to Fix CVE-2021-32810

To remediate this vulnerability, upgrade all affected Crossbeam deque dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

crossbeam-deque fixed: 0.7.4

Upgrade crossbeam-deque to 0.7.4

crossbeam-deque fixed: 0.8.1

Upgrade crossbeam-deque to 0.8.1

Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release:

inspect dependencies for crossbeam-deque

How to Check if You Are Affected

To determine whether your application is affected by CVE-2021-32810, inspect your project dependencies for Crossbeam deque:

inspect dependencies for crossbeam-deque

Analyze the terminal output to locate any version of Crossbeam deque in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.7.4), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition'), where the product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently. In Crossbeam deque, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Impact In the affected version of this crate, the result of the race condition is that one or more tasks in the worker queue can be popped twice instead of other tasks that are forgotten and never popped. If tasks are allocated on the heap, this can cause double free and a memory leak. If not, this still can cause a logical bug. Crates using `Stealer::steal`, `Stealer::steal_batch`, or `Stealer::steal_batch_and_pop` are affected by this issue. ### Patches This has been fixed in crossbeam-deque 0.8.1 and 0.7.4. ### Credits This issue was reported and fixed by Maor Kleinberger. ### License This advisory is in the public domain.

CVE-2021-32810 Affected Crossbeam deque Versions

2 component(s)

Fixed Versions:

0.7.40.8.1

Product / Package	Ecosystem	Affected Versions	Fixed Version
crossbeam-deque	crates.io	< 0.7.4	0.7.4
crossbeam-deque	crates.io	≥ 0.8.0 < 0.8.1	0.8.1

References

lists.fedoraproject.org/archives/list/packa... WEB

https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/AWHNNBJCU4EHA2X5ZAMJMGLDUYS5FEPP

lists.fedoraproject.org/archives/list/packa... WEB

https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7EZILHZDRGDPOBQ4KTW3E5PPMKLHGH5N

Crossbeam deque Source Repository REPOSITORY

https://github.com/crossbeam-rs/crossbeam

GitHub Advisory / Wiki ADVISORY

https://github.com/crossbeam-rs/crossbeam/security/advisories/GHSA-pqqp-xmhj-wgcw

NVD — CVE-2021-32810 NVD

https://nvd.nist.gov/vuln/detail/CVE-2021-32810

rustsec.org/advisories/rustsec-... WEB

https://rustsec.org/advisories/RUSTSEC-2021-0093.html

lists.fedoraproject.org/archives/list/packa... WEB

https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZQDIBB7VR3ER52FMSMNJPAWNDO5SITCE

lists.fedoraproject.org/archives/list/packa... WEB

https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XFBZWCLG7AGLJO4A7K5IMJVPLSWZ5TJP

lists.fedoraproject.org/archives/list/packa... WEB

https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WGB2H35CTZDHOV3VLC5BM6VFGURLLVRP

lists.fedoraproject.org/archives/list/packa... WEB

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Frequently Asked Questions

What is CVE-2021-32810?

CVE-2021-32810 is a security vulnerability in Crossbeam deque involving crossbeam-deque Data Race before v0.7.4 and v0.8.1 under CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition').

Which Crossbeam deque versions are affected?

Affected versions include releases prior to 0.7.4, 0.8.1 across affected packages: crossbeam-deque.

What version fixes CVE-2021-32810?

Upgrading to 0.7.4, 0.8.1 (or the latest patched release for your respective branch) resolves the vulnerability.

Is crossbeam-deque affected?

Yes, crossbeam-deque is affected in releases prior to 0.7.4, 0.8.1. Upgrade your dependency to 0.7.4, 0.8.1 or later.

What is the CVSS score of CVE-2021-32810?

CVE-2021-32810 has a CVSS v3.1 base score of 9.8 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

What CWE is associated with CVE-2021-32810?

CVE-2021-32810 is classified under CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') (The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.).

How can I check crates.io dependencies for CVE-2021-32810?

Run the dependency tree command: 'inspect dependencies for crossbeam-deque'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.

Machine-readable OSV JSON OSV v1.5 Schema

Normalized schema output

View Raw JSON

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  "published" : "2021-08-25T21:01:15Z",
  "aliases" : [ "CVE-2021-32810" ],
  "summary" : "crossbeam-deque Data Race before v0.7.4 and v0.8.1",
  "details" : "### Impact\n\nIn the affected version of this crate, the result of the race condition is that one or more tasks in the worker queue can be popped twice instead of other tasks that are forgotten and never popped. If tasks are allocated on the heap, this can cause double free and a memory leak. If not, this still can cause a logical bug.\n\nCrates using `Stealer::steal`, `Stealer::steal_batch`, or `Stealer::steal_batch_and_pop` are affected by this issue.\n\n### Patches\n\nThis has been fixed in crossbeam-deque 0.8.1 and 0.7.4.\n\n### Credits\n\nThis issue was reported and fixed by Maor Kleinberger.\n\n### License\n\nThis advisory is in the public domain.",
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    "nvd_published_at" : "2021-08-02T19:15:00Z"
  }
}

CVSS V3

9.8 CRITICAL

Attack Vector Network (AV:N)

Attack Complexity Low (AC:L)

Privileges Required None (PR:N)

User Interaction None (UI:N)

Scope Unchanged (S:U)

Confidentiality High (C:H)

Integrity High (I:H)

Availability High (A:H)

Vector String

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

Advisory Metadata

Source ID: GHSA-pqqp-xmhj-wgcw
Schema Version: 1.4.0
Published: 2021-08-25 21:01
Last Modified: 2022-08-10 23:46
Database Record File: advisories/github-reviewed/2021/08/GHSA-pqqp-xmhj-wgcw/GHSA-pqqp-xmhj-wgcw.json