CVE-2020-36437: Conqueue Data Race Vulnerability

HIGH
Advisory Identifier: GHSA-368f-29c3-4f2r
Share
CVSS 8.1
CWE-362 CWE-119
Published
Advisory Summary

CVE-2020-36437 is a HIGH (CVSS 8.1) data race vulnerability (CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')) affecting Conqueue libraries in the crates.io ecosystem. The issue involves data race in conqueue. Remediation is available by upgrading affected packages to version 0.4.0.

CVE-2020-36437 at a Glance

CVE Identifier CVE-2020-36437
GHSA Identifier GHSA-368f-29c3-4f2r
Severity HIGH
CVSS v3.1 Base Score 8.1
CWE Classification CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Affected Product Conqueue
Package Ecosystem crates.io
Published Date
Last Updated

Security Impact

CVSS: 8.1

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

Attack Vector Network (AV:N)
Attack Complexity High (AC:H)
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-2020-36437

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

conqueue fixed: 0.4.0 
Upgrade conqueue to 0.4.0
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 conqueue

How to Check if You Are Affected

To determine whether your application is affected by CVE-2020-36437, inspect your project dependencies for Conqueue:

inspect dependencies for conqueue

Analyze the terminal output to locate any version of Conqueue in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.4.0), 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 Conqueue, 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

Affected versions of this crate unconditionally implemented `Send`/`Sync` for `QueueSender<T>`, allowing to send non-Send `T` to other threads by invoking `(&QueueSender<T>).send()`. This fails to prevent users from creating data races by sending types like `Rc<T>` or `Arc<Cell<T>>` to other threads, which can lead to memory corruption. The flaw was corrected in commit `1e462c3` by imposing `T: Send` to both `Send`/`Sync` impls for `QueueSender<T>`/`QueueReceiver<T>`.

CVE-2020-36437 Affected Conqueue Versions

1 component(s)
Fixed Versions:
0.4.0
Product / Package Ecosystem Affected Versions Fixed Version
conqueue
 crates.io
< 0.4.0
0.4.0

References

NVD — CVE-2020-36437 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-36437
Security Fix Commit FIX COMMIT
https://github.com/longshorej/conqueue/commit/1e462c32e7933821ddb26dc49fd4ffa5aeca97b8
Conqueue Source Repository REPOSITORY
https://github.com/longshorej/conqueue
raw.githubusercontent.com/rustsec/advisory-db... WEB
https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/conqueue/RUSTSEC-2020-0117.md
rustsec.org/advisories/rustsec-... WEB
https://rustsec.org/advisories/RUSTSEC-2020-0117.html

Frequently Asked Questions

What is CVE-2020-36437?
CVE-2020-36437 is a security vulnerability in Conqueue involving Data race in conqueue under CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition').
Which Conqueue versions are affected?
Affected versions include releases prior to 0.4.0 across affected packages: conqueue.
What version fixes CVE-2020-36437?
Upgrading to 0.4.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is conqueue affected?
Yes, conqueue is affected in releases prior to 0.4.0. Upgrade your dependency to 0.4.0 or later.
What is the CVSS score of CVE-2020-36437?
CVE-2020-36437 has a CVSS v3.1 base score of 8.1 (HIGH) with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2020-36437?
CVE-2020-36437 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-2020-36437?
Run the dependency tree command: 'inspect dependencies for conqueue'. 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 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-368f-29c3-4f2r",
  "modified" : "2023-06-13T22:36:54Z",
  "published" : "2021-08-25T20:58:50Z",
  "aliases" : [ "CVE-2020-36437" ],
  "summary" : "Data race in conqueue",
  "details" : "Affected versions of this crate unconditionally implemented `Send`/`Sync` for `QueueSender<T>`, allowing to send non-Send `T` to other threads by invoking `(&QueueSender<T>).send()`.\n\nThis fails to prevent users from creating data races by sending types like `Rc<T>` or `Arc<Cell<T>>` to other threads, which can lead to memory corruption. The flaw was corrected in commit `1e462c3` by imposing `T: Send` to both `Send`/`Sync` impls for `QueueSender<T>`/`QueueReceiver<T>`.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "crates.io",
      "name" : "conqueue"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.4.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-36437"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/longshorej/conqueue/commit/1e462c32e7933821ddb26dc49fd4ffa5aeca97b8"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/longshorej/conqueue"
  }, {
    "type" : "WEB",
    "url" : "https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/conqueue/RUSTSEC-2020-0117.md"
  }, {
    "type" : "WEB",
    "url" : "https://rustsec.org/advisories/RUSTSEC-2020-0117.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-119", "CWE-362" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-08-10T17:36:54Z",
    "nvd_published_at" : "2021-08-08T06:15:00Z"
  }
}