GHSA-XXXQ-CHMP-67G4

Vulnerability from github – Published: 2020-06-26 16:27 – Updated: 2023-01-31 01:29
VLAI
Summary
RSA PKCS#1 decryption vulnerability with prepending zeros in jsrsasign
Details

Impact

Jsrsasign supports RSA PKCS#1 v1.5 (i.e. RSAES-PKCS1-v1_5) and RSA-OAEP encryption and decryption. Its encrypted message is represented as BigInteger. When there is a valid encrypted message, a crafted message with prepending zeros can be decrypted by this vulnerability.

  • If you don't use RSA PKCS1-v1_5 or RSA-OAEP decryption, this vulnerability is not affected.
  • Risk to forge contents of encrypted message is very low.
  • Risk to raise memory corruption is low since jsrsasign uses BigInteger class.

Patches

Users using RSA PKCS1-v1_5 or RSA-OAEP decryption should upgrade to 8.0.18.

Workarounds

Reject RSA PKCS1-v1_5 or RSA-OAEP encrypted message with unnecessary prepending zeros.

References

https://nvd.nist.gov/vuln/detail/CVE-2020-14967 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-14967 https://vuldb.com/?id.157124 https://kjur.github.io/jsrsasign/api/symbols/KJUR.crypto.Cipher.html#.decrypt https://github.com/kjur/jsrsasign/issues/439

Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "jsrsasign"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "8.0.18"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2020-14967"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-119"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2020-06-26T16:26:32Z",
    "nvd_published_at": "2020-06-22T12:15:00Z",
    "severity": "CRITICAL"
  },
  "details": "### Impact\nJsrsasign supports RSA PKCS#1 v1.5 (i.e. RSAES-PKCS1-v1_5) and RSA-OAEP encryption and decryption. Its encrypted message is represented as BigInteger. When there is a valid encrypted message, a crafted message with prepending zeros can be decrypted by this vulnerability.\n\n- If you don\u0027t use RSA PKCS1-v1_5 or RSA-OAEP decryption, this vulnerability is not affected.\n- Risk to forge contents of encrypted message is very low.\n- Risk to raise memory corruption is low since jsrsasign uses BigInteger class.\n\n### Patches\nUsers using RSA PKCS1-v1_5 or RSA-OAEP decryption should upgrade to 8.0.18.\n\n### Workarounds\nReject RSA PKCS1-v1_5 or RSA-OAEP encrypted message with unnecessary prepending zeros.\n\n### References\nhttps://nvd.nist.gov/vuln/detail/CVE-2020-14967\nhttps://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-14967\nhttps://vuldb.com/?id.157124\nhttps://kjur.github.io/jsrsasign/api/symbols/KJUR.crypto.Cipher.html#.decrypt\nhttps://github.com/kjur/jsrsasign/issues/439\n\n\n\n",
  "id": "GHSA-xxxq-chmp-67g4",
  "modified": "2023-01-31T01:29:40Z",
  "published": "2020-06-26T16:27:08Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/kjur/jsrsasign/security/advisories/GHSA-xxxq-chmp-67g4"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-14967"
    },
    {
      "type": "WEB",
      "url": "https://github.com/kjur/jsrsasign/issues/439"
    },
    {
      "type": "WEB",
      "url": "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-14967"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/kjur/jsrsasign"
    },
    {
      "type": "WEB",
      "url": "https://github.com/kjur/jsrsasign/releases/tag/8.0.17"
    },
    {
      "type": "WEB",
      "url": "https://github.com/kjur/jsrsasign/releases/tag/8.0.18"
    },
    {
      "type": "WEB",
      "url": "https://kjur.github.io/jsrsasign"
    },
    {
      "type": "WEB",
      "url": "https://kjur.github.io/jsrsasign/api/symbols/KJUR.crypto.Cipher.html#.decrypt"
    },
    {
      "type": "WEB",
      "url": "https://security.netapp.com/advisory/ntap-20200724-0001"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?id.157124"
    },
    {
      "type": "WEB",
      "url": "https://www.npmjs.com/package/jsrsasign"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "RSA PKCS#1 decryption vulnerability with prepending zeros in jsrsasign"
}



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