CVE-2020-36460: Model Data Races Vulnerability

HIGH
Advisory Identifier: GHSA-mxv6-q98x-h958
Share
CVSS 8.1
CWE-362 CWE-843
Published
Advisory Summary

CVE-2020-36460 is a HIGH (CVSS 8.1) data races vulnerability (CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')) affecting Model libraries in the crates.io ecosystem. The issue involves data races in model. Remediation is available in the latest vendor maintenance releases.

CVE-2020-36460 at a Glance

CVE Identifier CVE-2020-36460
GHSA Identifier GHSA-mxv6-q98x-h958
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 Model
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-2020-36460

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

model fixed: Latest secure release 
Upgrade model to Latest secure release
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 model

How to Check if You Are Affected

To determine whether your application is affected by CVE-2020-36460, inspect your project dependencies for Model:

inspect dependencies for model

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

`Shared` data structure in `model` crate implements `Send` and `Sync` traits regardless of the inner type. This allows safe Rust code to trigger a data race, which is undefined behavior in Rust. Users are advised to treat `Shared` as an unsafe type. It should not be used outside of the testing context, and care must be taken so that the testing code does not have a data race besides a race condition that is expected to be caught by the test.

CVE-2020-36460 Affected Model Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
model
 crates.io
≤ 0.1.2

References

NVD — CVE-2020-36460 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-36460
Model Source Repository REPOSITORY
https://github.com/spacejam/model/issues/3
Model Source Repository REPOSITORY
https://github.com/spacejam/model
rustsec.org/advisories/rustsec-... WEB
https://rustsec.org/advisories/RUSTSEC-2020-0140.html

Frequently Asked Questions

What is CVE-2020-36460?
CVE-2020-36460 is a security vulnerability in Model involving Data races in model under CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition').
Which Model versions are affected?
Affected versions include releases prior to current release patches across affected packages: model.
What version fixes CVE-2020-36460?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is model affected?
Yes, model is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2020-36460?
CVE-2020-36460 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-2020-36460?
CVE-2020-36460 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-2020-36460?
Run the dependency tree command: 'inspect dependencies for model'. 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-mxv6-q98x-h958",
  "modified" : "2021-08-24T18:00:46Z",
  "published" : "2021-08-25T20:56:07Z",
  "aliases" : [ "CVE-2020-36460" ],
  "summary" : "Data races in model",
  "details" : "`Shared` data structure in `model` crate implements `Send` and `Sync` traits regardless of the inner type.\nThis allows safe Rust code to trigger a data race, which is undefined behavior in Rust.\n\nUsers are advised to treat `Shared` as an unsafe type.\nIt should not be used outside of the testing context,\nand care must be taken so that the testing code does not have a data race\nbesides a race condition that is expected to be caught by the test.\n",
  "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" : "model"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "0.1.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-36460"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/spacejam/model/issues/3"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/spacejam/model"
  }, {
    "type" : "WEB",
    "url" : "https://rustsec.org/advisories/RUSTSEC-2020-0140.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-362", "CWE-843" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-08-18T21:17:33Z",
    "nvd_published_at" : "2021-08-08T06:15:00Z"
  }
}