CVE-2020-36219: Atomic option Data Race Vulnerability

MODERATE
Advisory Identifier: GHSA-8gf5-q9p9-wvmc
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CVSS 5.9
CWE-662
Published
Advisory Summary

CVE-2020-36219 is a MODERATE (CVSS 5.9) data race vulnerability (CWE-662: Improper Synchronization) affecting Atomic option libraries in the crates.io ecosystem. The issue involves data race in atomic-option. Remediation is available in the latest vendor maintenance releases.

CVE-2020-36219 at a Glance

CVE Identifier CVE-2020-36219
GHSA Identifier GHSA-8gf5-q9p9-wvmc
Severity MODERATE
CVSS v3.1 Base Score 5.9
CWE Classification CWE-662: Improper Synchronization
Affected Product Atomic option
Package Ecosystem crates.io
Published Date
Last Updated

Security Impact

CVSS: 5.9

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:N/I:N/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 None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2020-36219

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

atomic-option fixed: Latest secure release 
Upgrade atomic-option 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 atomic-option

How to Check if You Are Affected

To determine whether your application is affected by CVE-2020-36219, inspect your project dependencies for Atomic option:

inspect dependencies for atomic-option

Analyze the terminal output to locate any version of Atomic option 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-662: Improper Synchronization, where the product utilizes multiple threads, processes, components, or systems to allow temporary access to a shared resource that can only be exclusive to one process at a time, but it does not properly synchronize these actions, which might cause simultaneous accesses of this resource by multiple threads or processes. In Atomic option, 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

An issue was discovered in the atomic-option crate through 2020-10-31 for Rust. Because AtomicOption<T> implements Sync unconditionally, a data race can occur.

CVE-2020-36219 Affected Atomic option Versions

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

References

NVD — CVE-2020-36219 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-36219
Atomic option Source Repository REPOSITORY
https://github.com/reem/rust-atomic-option/issues/4
Atomic option Source Repository REPOSITORY
https://github.com/reem/rust-atomic-option
rustsec.org/advisories/rustsec-... WEB
https://rustsec.org/advisories/RUSTSEC-2020-0113.html

Frequently Asked Questions

What is CVE-2020-36219?
CVE-2020-36219 is a security vulnerability in Atomic option involving Data race in atomic-option under CWE-662: Improper Synchronization.
Which Atomic option versions are affected?
Affected versions include releases prior to current release patches across affected packages: atomic-option.
What version fixes CVE-2020-36219?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is atomic-option affected?
Yes, atomic-option 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-2020-36219?
CVE-2020-36219 has a CVSS v3.1 base score of 5.9 (MODERATE) with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2020-36219?
CVE-2020-36219 is classified under CWE-662: Improper Synchronization (The product utilizes multiple threads, processes, components, or systems to allow temporary access to a shared resource that can only be exclusive to one process at a time, but it does not properly synchronize these actions, which might cause simultaneous accesses of this resource by multiple threads or processes.).
How can I check crates.io dependencies for CVE-2020-36219?
Run the dependency tree command: 'inspect dependencies for atomic-option'. 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-8gf5-q9p9-wvmc",
  "modified" : "2021-08-19T18:48:32Z",
  "published" : "2021-08-25T20:51:42Z",
  "aliases" : [ "CVE-2020-36219" ],
  "summary" : "Data race in atomic-option",
  "details" : "An issue was discovered in the atomic-option crate through 2020-10-31 for Rust. Because AtomicOption<T> implements Sync unconditionally, a data race can occur.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "crates.io",
      "name" : "atomic-option"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "0.1.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-36219"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/reem/rust-atomic-option/issues/4"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/reem/rust-atomic-option"
  }, {
    "type" : "WEB",
    "url" : "https://rustsec.org/advisories/RUSTSEC-2020-0113.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-662" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-08-19T18:48:32Z",
    "nvd_published_at" : "2021-01-26T18:15:00Z"
  }
}