CVE-2022-21165: Font converter Font-Converter Vulnerable To Arbitrary Command Vulnerability

CRITICAL
Advisory Identifier: GHSA-g2c3-vwff-m3xr
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CVSS 9.8
CWE-77
Published
Advisory Summary

CVE-2022-21165 is a CRITICAL (CVSS 9.8) font-converter vulnerable to arbitrary command vulnerability (CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection')) affecting Font converter libraries in the npm ecosystem. The issue involves font-converter vulnerable to arbitrary command injection. Remediation is available in the latest vendor maintenance releases.

CVE-2022-21165 at a Glance

CVE Identifier CVE-2022-21165
GHSA Identifier GHSA-g2c3-vwff-m3xr
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection')
Affected Product Font converter
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 9.8

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:H/I:H/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 High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2022-21165

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

font-converter fixed: Latest secure release 
npm install font-converter@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: 

npm ls font-converter

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2022-21165, inspect your project dependencies using npm:

npm ls font-converter

Analyze the terminal output to locate any version of Font converter 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: The npm ls font-converter command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection'), where the product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component. In Font converter, 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

### Overview font-converter is a FontForge wrapper that allows conversion between different font formats (TTF, WOFF, OTF) All versions of this package are vulnerable to Arbitrary Command Injection due to missing sanitization of input that potentially flows into the `child_process.exec()` function. ### PoC ```js var PUT = require('font-converter'); var x = "$(touch success);# "; try { new PUT(x, x, x, x); } catch (e) { console.log(e); } ```

CVE-2022-21165 Affected Font converter Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
font-converter
npm/font-converter
npm
≤ 1.1.1

References

NVD — CVE-2022-21165 NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-21165
Font converter Source Repository REPOSITORY
https://github.com/zgec/node-js-font-converter
Font converter Source Repository REPOSITORY
https://github.com/zgec/node-js-font-converter/blob/master/index.js#L12
Font converter Security Information SECURITY
https://security.snyk.io/vuln/SNYK-JS-FONTCONVERTER-2976194

Frequently Asked Questions

What is CVE-2022-21165?
CVE-2022-21165 is a security vulnerability in Font converter involving Font-Converter Vulnerable to Arbitrary Command Injection under CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection').
Which Font converter versions are affected?
Affected versions include releases prior to current release patches across affected packages: font-converter.
What version fixes CVE-2022-21165?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is font-converter affected?
Yes, font-converter 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-2022-21165?
CVE-2022-21165 has a CVSS v3.1 base score of 9.8 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2022-21165?
CVE-2022-21165 is classified under CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection') (The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.).
How can I check npm dependencies for CVE-2022-21165?
Run the dependency tree command: 'npm ls font-converter'. 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-g2c3-vwff-m3xr",
  "modified" : "2024-04-22T23:17:12Z",
  "published" : "2022-08-29T20:06:54Z",
  "aliases" : [ "CVE-2022-21165" ],
  "summary" : "Font-Converter Vulnerable to Arbitrary Command Injection",
  "details" : "### Overview\nfont-converter is a FontForge wrapper that allows conversion between different font formats (TTF, WOFF, OTF)\n\nAll versions of this package are vulnerable to Arbitrary Command Injection due to missing sanitization of input that potentially flows into the `child_process.exec()` function.\n\n### PoC\n```js\nvar PUT = require('font-converter');\nvar x = \"$(touch success);# \";\ntry {\n    new PUT(x, x, x, x);\n} catch (e) {\n    console.log(e);\n}\n```",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "font-converter"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "1.1.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2022-21165"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/zgec/node-js-font-converter"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/zgec/node-js-font-converter/blob/master/index.js#L12"
  }, {
    "type" : "WEB",
    "url" : "https://security.snyk.io/vuln/SNYK-JS-FONTCONVERTER-2976194"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-77" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-04-22T23:17:12Z",
    "nvd_published_at" : "2022-08-29T05:15:00Z"
  }
}