CVE-2019-16141: Once cell Improper Input Validation Vulnerability

HIGH
Advisory Identifier: GHSA-7j44-fv4x-79g9
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CVSS 7.5
CWE-20
Published
Advisory Summary

CVE-2019-16141 is a HIGH (CVSS 7.5) improper input validation vulnerability (CWE-20: Improper Input Validation) affecting Once cell libraries in the crates.io ecosystem. The issue involves improper input validation in once_cell. Remediation is available by upgrading affected packages to version 1.0.1.

CVE-2019-16141 at a Glance

CVE Identifier CVE-2019-16141
GHSA Identifier GHSA-7j44-fv4x-79g9
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-20: Improper Input Validation
Affected Product Once cell
Package Ecosystem crates.io
Published Date
Last Updated

Security Impact

CVSS: 7.5

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

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
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-2019-16141

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

once_cell fixed: 1.0.1 
Upgrade once_cell to 1.0.1
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 once_cell

How to Check if You Are Affected

To determine whether your application is affected by CVE-2019-16141, inspect your project dependencies for Once cell:

inspect dependencies for once_cell

Analyze the terminal output to locate any version of Once cell in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.0.1), 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-20: Improper Input Validation, where the product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. In Once cell, 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

If during the first dereference of Lazy the initialization function panics, subsequent dereferences will execute std::hints::unreachable_unchecked. Applications with panic = "abort" are not affected, as there will be no subsequent dereferences.

CVE-2019-16141 Affected Once cell Versions

1 component(s)
Fixed Versions:
1.0.1
Product / Package Ecosystem Affected Versions Fixed Version
once_cell
 crates.io
≥ 0.2.5
< 1.0.1
1.0.1

References

NVD — CVE-2019-16141 NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-16141
Once cell Source Repository REPOSITORY
https://github.com/matklad/once_cell/issues/46
Once cell Source Repository REPOSITORY
https://github.com/matklad/once_cell/pull/47
Security Fix Commit FIX COMMIT
https://github.com/matklad/once_cell/commit/afcca95a05240ebd931ab20998c946f77ef1e284
Once cell Source Repository REPOSITORY
https://github.com/matklad/once_cell
rustsec.org/advisories/rustsec-... WEB
https://rustsec.org/advisories/RUSTSEC-2019-0017.html

Frequently Asked Questions

What is CVE-2019-16141?
CVE-2019-16141 is a security vulnerability in Once cell involving Improper Input Validation in once_cell under CWE-20: Improper Input Validation.
Which Once cell versions are affected?
Affected versions include releases prior to 1.0.1 across affected packages: once_cell.
What version fixes CVE-2019-16141?
Upgrading to 1.0.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is once_cell affected?
Yes, once_cell is affected in releases prior to 1.0.1. Upgrade your dependency to 1.0.1 or later.
What is the CVSS score of CVE-2019-16141?
CVE-2019-16141 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2019-16141?
CVE-2019-16141 is classified under CWE-20: Improper Input Validation (The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.).
How can I check crates.io dependencies for CVE-2019-16141?
Run the dependency tree command: 'inspect dependencies for once_cell'. 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-7j44-fv4x-79g9",
  "modified" : "2023-06-13T19:58:10Z",
  "published" : "2021-08-25T20:44:18Z",
  "aliases" : [ "CVE-2019-16141" ],
  "summary" : "Improper Input Validation in once_cell",
  "details" : "If during the first dereference of Lazy the initialization function panics, subsequent dereferences will execute std::hints::unreachable_unchecked. Applications with panic = \"abort\" are not affected, as there will be no subsequent dereferences.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "crates.io",
      "name" : "once_cell"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0.2.5"
      }, {
        "fixed" : "1.0.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2019-16141"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/matklad/once_cell/issues/46"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/matklad/once_cell/pull/47"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/matklad/once_cell/commit/afcca95a05240ebd931ab20998c946f77ef1e284"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/matklad/once_cell"
  }, {
    "type" : "WEB",
    "url" : "https://rustsec.org/advisories/RUSTSEC-2019-0017.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-20" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-08-19T21:22:57Z",
    "nvd_published_at" : null
  }
}