Vulnerability-Lookup

GHSA-3839-6R69-M497

Vulnerability from github – Published: 2022-12-28 00:30 – Updated: 2026-01-23 22:51

Withdrawn 2026-01-23

Summary

Duplicate Advisory: GoUtils's randomly-generated alphanumeric strings contain significantly less entropy than expected

Details

Duplicate Advisory

This advisory has been withdrawn because it is a duplicate of GHSA-xg2h-wx96-xgxr. This link is maintained to preserve external references.

Original Description

Randomly-generated alphanumeric strings contain significantly less entropy than expected. The RandomAlphaNumeric and CryptoRandomAlphaNumeric functions always return strings containing at least one digit from 0 to 9. This significantly reduces the amount of entropy in short strings generated by these functions.

Severity

9.1 (Critical)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/Masterminds/goutils"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.1.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [
      "CWE-331"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2022-12-30T18:53:53Z",
    "nvd_published_at": "2022-12-27T22:15:00Z",
    "severity": "CRITICAL"
  },
  "details": "## Duplicate Advisory\nThis advisory has been withdrawn because it is a duplicate of GHSA-xg2h-wx96-xgxr. This link is maintained to preserve external references.\n\n## Original Description\nRandomly-generated alphanumeric strings contain significantly less entropy than expected. The `RandomAlphaNumeric` and `CryptoRandomAlphaNumeric` functions always return strings containing at least one digit from 0 to 9. This significantly reduces the amount of entropy in short strings generated by these functions.",
  "id": "GHSA-3839-6r69-m497",
  "modified": "2026-01-23T22:51:27Z",
  "published": "2022-12-28T00:30:23Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-4238"
    },
    {
      "type": "WEB",
      "url": "https://github.com/Masterminds/goutils/commit/869801f20f9f1e7ecdbdb6422049d8241270d5e1"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/Masterminds/goutils"
    },
    {
      "type": "WEB",
      "url": "https://pkg.go.dev/vuln/GO-2022-0411"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Duplicate Advisory: GoUtils\u0027s randomly-generated alphanumeric strings contain significantly less entropy than expected",
  "withdrawn": "2026-01-23T22:51:27Z"
}

CVE-2021-4238 (GCVE-0-2021-4238)

Vulnerability from cvelistv5 – Published: 2022-12-27 21:13 – Updated: 2025-04-11 16:17

Title

Insufficient randomness in github.com/Masterminds/goutils

Summary

Randomly-generated alphanumeric strings contain significantly less entropy than expected. The RandomAlphaNumeric and CryptoRandomAlphaNumeric functions always return strings containing at least one digit from 0 to 9. This significantly reduces the amount of entropy in short strings generated by these functions.

Severity

9.1 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-04-11 16:17 UTC

CWE

CWE 330: Use of Insufficiently Random Values

Assigner

Go Google root

References

2 references

URL	Tags
https://github.com/Masterminds/goutils/commit/869…
https://pkg.go.dev/vuln/GO-2022-0411

Impacted products

1 product

Vendor	Product	Version
github.com/Masterminds/goutils	github.com/Masterminds/goutils	Affected: 0 , < 1.1.1 (semver)

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JSON

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{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T17:23:10.165Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://github.com/Masterminds/goutils/commit/869801f20f9f1e7ecdbdb6422049d8241270d5e1"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://pkg.go.dev/vuln/GO-2022-0411"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 9.1,
              "baseSeverity": "CRITICAL",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2021-4238",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-04-11T16:17:07.316383Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-04-11T16:17:46.299Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "github.com/Masterminds/goutils",
          "product": "github.com/Masterminds/goutils",
          "programRoutines": [
            {
              "name": "RandomAlphaNumeric"
            },
            {
              "name": "CryptoRandomAlphaNumeric"
            }
          ],
          "vendor": "github.com/Masterminds/goutils",
          "versions": [
            {
              "lessThan": "1.1.1",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Randomly-generated alphanumeric strings contain significantly less entropy than expected. The RandomAlphaNumeric and CryptoRandomAlphaNumeric functions always return strings containing at least one digit from 0 to 9. This significantly reduces the amount of entropy in short strings generated by these functions."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE 330: Use of Insufficiently Random Values",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2023-06-12T19:04:16.468Z",
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
        "shortName": "Go"
      },
      "references": [
        {
          "url": "https://github.com/Masterminds/goutils/commit/869801f20f9f1e7ecdbdb6422049d8241270d5e1"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2022-0411"
        }
      ],
      "title": "Insufficient randomness in github.com/Masterminds/goutils"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
    "assignerShortName": "Go",
    "cveId": "CVE-2021-4238",
    "datePublished": "2022-12-27T21:13:50.373Z",
    "dateReserved": "2022-07-29T19:56:49.058Z",
    "dateUpdated": "2025-04-11T16:17:46.299Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
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Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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