GSD-2021-27884

Vulnerability from gsd - Updated: 2023-12-13 01:23
Details
Weak JSON Web Token (JWT) signing secret generation in YMFE YApi through 1.9.2 allows recreation of other users' JWT tokens. This occurs because Math.random in Node.js is used.
Aliases
Aliases
CVE-2021-27884
To clipboard 

{
  "GSD": {
    "alias": "CVE-2021-27884",
    "description": "Weak JSON Web Token (JWT) signing secret generation in YMFE YApi through 1.9.2 allows recreation of other users\u0027 JWT tokens. This occurs because Math.random in Node.js is used.",
    "id": "GSD-2021-27884"
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2021-27884"
      ],
      "details": "Weak JSON Web Token (JWT) signing secret generation in YMFE YApi through 1.9.2 allows recreation of other users\u0027 JWT tokens. This occurs because Math.random in Node.js is used.",
      "id": "GSD-2021-27884",
      "modified": "2023-12-13T01:23:35.369111Z",
      "schema_version": "1.4.0"
    }
  },
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      "affects": {
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                    "version": {
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      "references": {
        "reference_data": [
          {
            "name": "https://securitylab.github.com/advisories/GHSL-2020-228-YMFE-yapi",
            "refsource": "MISC",
            "url": "https://securitylab.github.com/advisories/GHSL-2020-228-YMFE-yapi"
          },
          {
            "name": "https://github.com/YMFE/yapi/issues/2117",
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    },
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      "advisories": [
        {
          "affected_range": "\u003c=1.9.2",
          "affected_versions": "All versions up to 1.9.2",
          "cvss_v2": "AV:L/AC:L/Au:N/C:P/I:P/A:N",
          "cvss_v3": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
          "cwe_ids": [
            "CWE-1035",
            "CWE-330",
            "CWE-937"
          ],
          "date": "2021-07-22",
          "description": "Weak JSON Web Token (JWT) signing secret generation in YMFE YApi allows recreation of other users\u0027 JWT tokens. This occurs because Math.random in Node.js is used.",
          "fixed_versions": [
            "1.9.3"
          ],
          "identifier": "CVE-2021-27884",
          "identifiers": [
            "GHSA-2h3h-vw8r-82rp",
            "CVE-2021-27884"
          ],
          "not_impacted": "All versions after 1.9.2",
          "package_slug": "npm/yapi-vendor",
          "pubdate": "2021-03-26",
          "solution": "Upgrade to version 1.9.3 or above.",
          "title": "Use of Insufficiently Random Values",
          "urls": [
            "https://nvd.nist.gov/vuln/detail/CVE-2021-27884",
            "https://github.com/YMFE/yapi/issues/2117",
            "https://securitylab.github.com/advisories/GHSL-2020-228-YMFE-yapi",
            "https://github.com/YMFE/yapi/issues/2263",
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          "uuid": "1f86acbb-c8b3-42a2-b8b2-d2fe26e727c2"
        }
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                "cpe_name": [],
                "versionEndIncluding": "1.9.2",
                "vulnerable": true
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            }
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        },
        "problemtype": {
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      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "LOW",
            "accessVector": "LOCAL",
            "authentication": "NONE",
            "availabilityImpact": "NONE",
            "baseScore": 3.6,
            "confidentialityImpact": "PARTIAL",
            "integrityImpact": "PARTIAL",
            "vectorString": "AV:L/AC:L/Au:N/C:P/I:P/A:N",
            "version": "2.0"
          },
          "exploitabilityScore": 3.9,
          "impactScore": 4.9,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "LOW",
          "userInteractionRequired": false
        },
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            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 5.1,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
            "version": "3.1"
          },
          "exploitabilityScore": 2.5,
          "impactScore": 2.5
        }
      },
      "lastModifiedDate": "2021-03-08T16:24Z",
      "publishedDate": "2021-03-01T23:15Z"
    }
  }
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.