CVE-2020-36218: Buttplug Improper Synchronization Vulnerability

MODERATE
Advisory Identifier: GHSA-r7rv-2rph-hvhj
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CVSS 5.9
CWE-662
Published
Advisory Summary

CVE-2020-36218 is a MODERATE (CVSS 5.9) improper synchronization vulnerability (CWE-662: Improper Synchronization) affecting Buttplug libraries in the crates.io ecosystem. The issue involves improper synchronization in buttplug. Remediation is available by upgrading affected packages to version 1.0.4.

CVE-2020-36218 at a Glance

CVE Identifier CVE-2020-36218
GHSA Identifier GHSA-r7rv-2rph-hvhj
Severity MODERATE
CVSS v3.1 Base Score 5.9
CWE Classification CWE-662: Improper Synchronization
Affected Product Buttplug
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-2020-36218

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

buttplug fixed: 1.0.4 
Upgrade buttplug to 1.0.4
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 buttplug

How to Check if You Are Affected

To determine whether your application is affected by CVE-2020-36218, inspect your project dependencies for Buttplug:

inspect dependencies for buttplug

Analyze the terminal output to locate any version of Buttplug in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.0.4), 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-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 Buttplug, 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 buttplug crate before 1.0.4 for Rust. ButtplugFutureStateShared does not properly consider (!Send|!Sync) objects, leading to a data race.

CVE-2020-36218 Affected Buttplug Versions

1 component(s)
Fixed Versions:
1.0.4
Product / Package Ecosystem Affected Versions Fixed Version
buttplug
 crates.io
< 1.0.4
1.0.4

References

NVD — CVE-2020-36218 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-36218
Buttplug Source Repository REPOSITORY
https://github.com/buttplugio/buttplug-rs/issues/225
Buttplug Source Repository REPOSITORY
https://github.com/buttplugio/buttplug-rs
rustsec.org/advisories/rustsec-... WEB
https://rustsec.org/advisories/RUSTSEC-2020-0112.html

Frequently Asked Questions

What is CVE-2020-36218?
CVE-2020-36218 is a security vulnerability in Buttplug involving Improper synchronization in buttplug under CWE-662: Improper Synchronization.
Which Buttplug versions are affected?
Affected versions include releases prior to 1.0.4 across affected packages: buttplug.
What version fixes CVE-2020-36218?
Upgrading to 1.0.4 (or the latest patched release for your respective branch) resolves the vulnerability.
Is buttplug affected?
Yes, buttplug is affected in releases prior to 1.0.4. Upgrade your dependency to 1.0.4 or later.
What is the CVSS score of CVE-2020-36218?
CVE-2020-36218 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-2020-36218?
CVE-2020-36218 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-2020-36218?
Run the dependency tree command: 'inspect dependencies for buttplug'. 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-r7rv-2rph-hvhj",
  "modified" : "2021-08-19T18:48:19Z",
  "published" : "2021-08-25T20:51:45Z",
  "aliases" : [ "CVE-2020-36218" ],
  "summary" : "Improper synchronization in buttplug",
  "details" : "An issue was discovered in the buttplug crate before 1.0.4 for Rust. ButtplugFutureStateShared does not properly consider (!Send|!Sync) objects, leading to a data race.",
  "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" : "buttplug"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.0.4"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-36218"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/buttplugio/buttplug-rs/issues/225"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/buttplugio/buttplug-rs"
  }, {
    "type" : "WEB",
    "url" : "https://rustsec.org/advisories/RUSTSEC-2020-0112.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-662" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-08-19T18:48:19Z",
    "nvd_published_at" : null
  }
}