CVE-2018-1000620: Cryptiles Insufficient Entropy Vulnerability

CRITICAL
Advisory Identifier: GHSA-rq8g-5pc5-wrhr
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CVSS 9.8
CWE-331
Published
Advisory Summary

CVE-2018-1000620 is a CRITICAL (CVSS 9.8) insufficient entropy vulnerability (CWE-331: Insufficient Entropy) affecting Cryptiles libraries in the npm ecosystem. The issue involves insufficient entropy in cryptiles. Remediation is available by upgrading affected packages to version 4.1.2, 3.1.3.

CVE-2018-1000620 at a Glance

CVE Identifier CVE-2018-1000620
GHSA Identifier GHSA-rq8g-5pc5-wrhr
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-331: Insufficient Entropy
Affected Product Cryptiles
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:3.0/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-2018-1000620

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

cryptiles fixed: 4.1.2 
npm install cryptiles@4.1.2
cryptiles fixed: 3.1.3 
npm install cryptiles@3.1.3
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 cryptiles

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2018-1000620, inspect your project dependencies using npm:

npm ls cryptiles

Analyze the terminal output to locate any version of Cryptiles in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 4.1.2), your application is affected.

Note: The npm ls cryptiles 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-331: Insufficient Entropy, where the product uses an algorithm or scheme that produces insufficient entropy, leaving patterns or clusters of values that are more likely to occur than others. In Cryptiles, 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

Versions of `cryptiles` prior to 4.1.2 are vulnerable to Insufficient Entropy. The `randomDigits()` method does not provide sufficient entropy and its generates digits that are not evenly distributed. ## Recommendation Upgrade to version 4.1.2. The package is deprecated and has been moved to `@hapi/cryptiles` and it is strongly recommended to use the maintained package.

CVE-2018-1000620 Affected Cryptiles Versions

2 component(s)
Fixed Versions:
4.1.23.1.3
Product / Package Ecosystem Affected Versions Fixed Version
cryptiles
npm/cryptiles
npm
≥ 4.0.0
< 4.1.2
4.1.2
cryptiles
npm/cryptiles
npm
≥ 3.1.0
< 3.1.3
3.1.3

References

NVD — CVE-2018-1000620 NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-1000620
Cryptiles Source Repository REPOSITORY
https://github.com/hapijs/cryptiles/issues/34
Cryptiles Source Repository REPOSITORY
https://github.com/hapijs/cryptiles/issues/35
Security Fix Commit FIX COMMIT
https://github.com/hapijs/cryptiles/commit/6bdcd0f6ee8ade96e7b30350bad39ee0c2ef0f9b
Security Fix Commit FIX COMMIT
https://github.com/hapijs/cryptiles/commit/9332d4263a32b84e76bf538d7470d01ea63fa047
Security Fix Commit FIX COMMIT
https://github.com/hapijs/cryptiles/commit/cb6bd642816e0cb8341d2b3896fd9e7c57e94f56
Cryptiles Source Repository REPOSITORY
https://github.com/hapijs/cryptiles
Cryptiles Source Repository REPOSITORY
https://github.com/nodejs/security-wg/blob/master/vuln/npm/476.json
www.npmjs.com/advisories/1464 WEB
https://www.npmjs.com/advisories/1464
www.npmjs.com/advisories/720 WEB
https://www.npmjs.com/advisories/720

Frequently Asked Questions

What is CVE-2018-1000620?
CVE-2018-1000620 is a security vulnerability in Cryptiles involving Insufficient Entropy in cryptiles under CWE-331: Insufficient Entropy.
Which Cryptiles versions are affected?
Affected versions include releases prior to 4.1.2, 3.1.3 across affected packages: cryptiles.
What version fixes CVE-2018-1000620?
Upgrading to 4.1.2, 3.1.3 (or the latest patched release for your respective branch) resolves the vulnerability.
Is cryptiles affected?
Yes, cryptiles is affected in releases prior to 4.1.2, 3.1.3. Upgrade your dependency to 4.1.2, 3.1.3 or later.
What is the CVSS score of CVE-2018-1000620?
CVE-2018-1000620 has a CVSS v3.1 base score of 9.8 (CRITICAL) with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2018-1000620?
CVE-2018-1000620 is classified under CWE-331: Insufficient Entropy (The product uses an algorithm or scheme that produces insufficient entropy, leaving patterns or clusters of values that are more likely to occur than others.).
How can I check npm dependencies for CVE-2018-1000620?
Run the dependency tree command: 'npm ls cryptiles'. 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-rq8g-5pc5-wrhr",
  "modified" : "2026-06-08T15:52:36Z",
  "published" : "2018-09-11T18:22:50Z",
  "aliases" : [ "CVE-2018-1000620" ],
  "summary" : "Insufficient Entropy in cryptiles",
  "details" : "Versions of `cryptiles` prior to 4.1.2 are vulnerable to Insufficient Entropy. The `randomDigits()` method does not provide sufficient entropy and its generates digits that are not evenly distributed.\n\n\n## Recommendation\n\nUpgrade to version 4.1.2. The package is deprecated and has been moved to `@hapi/cryptiles` and it is strongly recommended to use the maintained package.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "cryptiles"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "4.0.0"
      }, {
        "fixed" : "4.1.2"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "npm",
      "name" : "cryptiles"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "3.1.0"
      }, {
        "fixed" : "3.1.3"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2018-1000620"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/hapijs/cryptiles/issues/34"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/hapijs/cryptiles/issues/35"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/hapijs/cryptiles/commit/6bdcd0f6ee8ade96e7b30350bad39ee0c2ef0f9b"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/hapijs/cryptiles/commit/9332d4263a32b84e76bf538d7470d01ea63fa047"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/hapijs/cryptiles/commit/cb6bd642816e0cb8341d2b3896fd9e7c57e94f56"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/hapijs/cryptiles"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/nodejs/security-wg/blob/master/vuln/npm/476.json"
  }, {
    "type" : "WEB",
    "url" : "https://www.npmjs.com/advisories/1464"
  }, {
    "type" : "WEB",
    "url" : "https://www.npmjs.com/advisories/720"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-331" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2020-06-16T21:55:29Z",
    "nvd_published_at" : "2018-07-09T20:29:00Z"
  }
}