CVE-2020-36435: Ruspiro singleton Data Race Vulnerability

HIGH
Advisory Identifier: GHSA-fqq2-xp7m-xvm8
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CVSS 8.1
CWE-362 CWE-119
Published
Advisory Summary

CVE-2020-36435 is a HIGH (CVSS 8.1) data race vulnerability (CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')) affecting Ruspiro singleton libraries in the crates.io ecosystem. The issue involves data race in ruspiro-singleton. Remediation is available by upgrading affected packages to version 0.4.1.

CVE-2020-36435 at a Glance

CVE Identifier CVE-2020-36435
GHSA Identifier GHSA-fqq2-xp7m-xvm8
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 Ruspiro singleton
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-2020-36435

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

ruspiro-singleton fixed: 0.4.1 
Upgrade ruspiro-singleton to 0.4.1
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 ruspiro-singleton

How to Check if You Are Affected

To determine whether your application is affected by CVE-2020-36435, inspect your project dependencies for Ruspiro singleton:

inspect dependencies for ruspiro-singleton

Analyze the terminal output to locate any version of Ruspiro singleton in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.4.1), 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 Ruspiro singleton, 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

`Singleton<T>` is meant to be a static object that can be initialized lazily. In order to satisfy the requirement that `static` items must implement `Sync`, `Singleton` implemented both `Sync` and `Send` unconditionally. This allows for a bug where non-`Sync` types such as `Cell` can be used in singletons and cause data races in concurrent programs. The flaw was corrected in commit `b0d2bd20e` by adding trait bounds, requiring the contaiend type to implement `Sync`.

CVE-2020-36435 Affected Ruspiro singleton Versions

1 component(s)
Fixed Versions:
0.4.1
Product / Package Ecosystem Affected Versions Fixed Version
ruspiro-singleton
 crates.io
< 0.4.1
0.4.1

References

NVD — CVE-2020-36435 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-36435
Ruspiro singleton Source Repository REPOSITORY
https://github.com/RusPiRo/ruspiro-singleton/issues/10
Ruspiro singleton Source Repository REPOSITORY
https://github.com/RusPiRo/ruspiro-singleton/pull/11
Security Fix Commit FIX COMMIT
https://github.com/RusPiRo/ruspiro-singleton/commit/b0d2bd20eb40b9cbc2958b981ba2dcd9e6f9396e
Ruspiro singleton Source Repository REPOSITORY
https://github.com/RusPiRo/ruspiro-singleton
raw.githubusercontent.com/rustsec/advisory-db... WEB
https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/ruspiro-singleton/RUSTSEC-2020-0115.md
rustsec.org/advisories/rustsec-... WEB
https://rustsec.org/advisories/RUSTSEC-2020-0115.html

Frequently Asked Questions

What is CVE-2020-36435?
CVE-2020-36435 is a security vulnerability in Ruspiro singleton involving Data race in ruspiro-singleton under CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition').
Which Ruspiro singleton versions are affected?
Affected versions include releases prior to 0.4.1 across affected packages: ruspiro-singleton.
What version fixes CVE-2020-36435?
Upgrading to 0.4.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is ruspiro-singleton affected?
Yes, ruspiro-singleton is affected in releases prior to 0.4.1. Upgrade your dependency to 0.4.1 or later.
What is the CVSS score of CVE-2020-36435?
CVE-2020-36435 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-2020-36435?
CVE-2020-36435 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-2020-36435?
Run the dependency tree command: 'inspect dependencies for ruspiro-singleton'. 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-fqq2-xp7m-xvm8",
  "modified" : "2021-08-24T17:45:32Z",
  "published" : "2021-08-25T20:58:19Z",
  "aliases" : [ "CVE-2020-36435" ],
  "summary" : "Data race in ruspiro-singleton",
  "details" : "`Singleton<T>` is meant to be a static object that can be initialized lazily. In\norder to satisfy the requirement that `static` items must implement `Sync`,\n`Singleton` implemented both `Sync` and `Send` unconditionally.\n\nThis allows for a bug where non-`Sync` types such as `Cell` can be used in\nsingletons and cause data races in concurrent programs.\n\nThe flaw was corrected in commit `b0d2bd20e` by adding trait bounds, requiring\nthe contaiend type to implement `Sync`.\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" : "ruspiro-singleton"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.4.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-36435"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/RusPiRo/ruspiro-singleton/issues/10"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/RusPiRo/ruspiro-singleton/pull/11"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/RusPiRo/ruspiro-singleton/commit/b0d2bd20eb40b9cbc2958b981ba2dcd9e6f9396e"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/RusPiRo/ruspiro-singleton"
  }, {
    "type" : "WEB",
    "url" : "https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/ruspiro-singleton/RUSTSEC-2020-0115.md"
  }, {
    "type" : "WEB",
    "url" : "https://rustsec.org/advisories/RUSTSEC-2020-0115.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-119", "CWE-362" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-08-18T20:14:26Z",
    "nvd_published_at" : "2021-08-08T06:15:00Z"
  }
}