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      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 6.5,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "LOW",
              "integrityImpact": "LOW",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
              "version": "3.1"
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            "other": {
              "content": {
                "id": "CVE-2025-40918",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-07-16T20:48:38.205622Z",
                "version": "2.0.3"
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          "dateUpdated": "2025-07-16T20:48:52.853Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://cpan.org/modules",
          "defaultStatus": "unaffected",
          "packageName": "Authen-SASL",
          "product": "Authen::SASL::Perl::DIGEST_MD5",
          "programFiles": [
            "DIGEST_MD5.pm"
          ],
          "repo": "https://github.com/gbarr/perl-authen-sasl",
          "vendor": "EHUELS",
          "versions": [
            {
              "lessThanOrEqual": "2.1800",
              "status": "affected",
              "version": "2.04",
              "versionType": "custom"
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        }
      ],
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          "lang": "en",
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              "value": "\u003cdiv\u003eAuthen::SASL::Perl::DIGEST_MD5 versions 2.04 through 2.1800 for Perl generates the cnonce insecurely.\u003c/div\u003e\u003cdiv\u003eThe cnonce (client nonce) is generated from an MD5 hash of the PID, the epoch time and the built-in rand function. The PID will come from a small set of numbers, and the epoch time may be guessed, if it is not leaked from the HTTP Date header. The built-in rand function is unsuitable for cryptographic usage.\u003c/div\u003e\u003cdiv\u003eAccording to RFC 2831, \u003cq\u003eThe cnonce-value is an opaque quoted string value provided by the client and used by both client and server to avoid chosen plaintext attacks, and to provide mutual authentication. The security of the implementation\n depends on a good choice. It is RECOMMENDED that it contain at least 64 bits of entropy.\u003c/q\u003e\u003c/div\u003e"
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          ],
          "value": "Authen::SASL::Perl::DIGEST_MD5 versions 2.04 through 2.1800 for Perl generates the cnonce insecurely.\n\nThe cnonce (client nonce) is generated from an MD5 hash of the PID, the epoch time and the built-in rand function. The PID will come from a small set of numbers, and the epoch time may be guessed, if it is not leaked from the HTTP Date header. The built-in rand function is unsuitable for cryptographic usage.\n\nAccording to RFC 2831, The cnonce-value is an opaque quoted string value provided by the client and used by both client and server to avoid chosen plaintext attacks, and to provide mutual authentication. The security of the implementation\n depends on a good choice. It is RECOMMENDED that it contain at least 64 bits of entropy."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-340",
              "description": "CWE-340 Generation of Predictable Numbers or Identifiers",
              "lang": "en",
              "type": "CWE"
            },
            {
              "cweId": "CWE-338",
              "description": "CWE-338 Use of Cryptographically Weak Pseudo-Random Number Generator",
              "lang": "en",
              "type": "CWE"
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          ]
        }
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      "providerMetadata": {
        "dateUpdated": "2025-08-07T09:08:47.396Z",
        "orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
        "shortName": "CPANSec"
      },
      "references": [
        {
          "url": "https://metacpan.org/release/EHUELS/Authen-SASL-2.1900/changes"
        },
        {
          "url": "https://metacpan.org/dist/Authen-SASL/source/lib/Authen/SASL/Perl/DIGEST_MD5.pm#L263"
        },
        {
          "url": "https://datatracker.ietf.org/doc/html/rfc2831"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://security.metacpan.org/patches/A/Authen-SASL/2.1800/CVE-2025-40918-r1.patch"
        },
        {
          "tags": [
            "issue-tracking"
          ],
          "url": "https://github.com/gbarr/perl-authen-sasl/pull/22"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "supportingMedia": [
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              "value": "\u003cdiv\u003eUsers should upgrade to version 2.1900 or later.\u003c/div\u003e"
            }
          ],
          "value": "Users should upgrade to version 2.1900 or later."
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Authen::SASL::Perl::DIGEST_MD5 versions 2.04 through 2.1800 for Perl generates the cnonce insecurely",
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    "assignerShortName": "CPANSec",
    "cveId": "CVE-2025-40918",
    "datePublished": "2025-07-16T14:00:12.777Z",
    "dateReserved": "2025-04-16T09:05:34.361Z",
    "dateUpdated": "2025-08-07T09:08:47.396Z",
    "state": "PUBLISHED"
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  "dataVersion": "5.1"
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