cvelistv5 - cve-2025-40919

CVE-2025-40919 (GCVE-0-2025-40919)

Vulnerability from cvelistv5 – Published: 2025-07-16 14:04 – Updated: 2025-07-16 20:49

Summary

Authen::DigestMD5 versions 0.01 through 0.02 for Perl generate the cnonce insecurely. The 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. According 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 depends on a good choice. It is RECOMMENDED that it contain at least 64 bits of entropy."

Severity ?

6.5 (Medium)


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

CWE

CWE-340 - Generation of Predictable Numbers or Identifiers
CWE-338 - Use of Cryptographically Weak Pseudo-Random Number Generator

Assigner

CPANSec

References

URL

Tags

	https://metacpan.org/release/SALVA/Authen-DigestM…
	https://datatracker.ietf.org/doc/html/rfc2831

Impacted products

	Vendor	Product	Version
	SALVA	Authen::DigestMD5	Affected: 0.01 , ≤ 0.04 (custom)

Show details on NVD website

JSON

To clipboard

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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",
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              "version": "3.1"
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              "value": "\u003cdiv\u003eAuthen::DigestMD5 versions 0.01 through 0.02 for Perl generate 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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            },
            {
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      "references": [
        {
          "url": "https://metacpan.org/release/SALVA/Authen-DigestMD5-0.01/source/DigestMD5.pm#L126"
        },
        {
          "url": "https://datatracker.ietf.org/doc/html/rfc2831"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
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    "assignerShortName": "CPANSec",
    "cveId": "CVE-2025-40919",
    "datePublished": "2025-07-16T14:04:09.443Z",
    "dateReserved": "2025-04-16T09:05:34.362Z",
    "dateUpdated": "2025-07-16T20:49:26.539Z",
    "state": "PUBLISHED"
  },
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    "nvd": "{\"cve\":{\"id\":\"CVE-2025-40919\",\"sourceIdentifier\":\"9b29abf9-4ab0-4765-b253-1875cd9b441e\",\"published\":\"2025-07-16T14:15:25.480\",\"lastModified\":\"2025-07-16T21:15:27.623\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Authen::DigestMD5 versions 0.01 through 0.02 for Perl generate 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 depends on a good choice. It is RECOMMENDED that it contain at least 64 bits of entropy.\\\"\"},{\"lang\":\"es\",\"value\":\"Las versiones 0.01 a 0.02 de Authen::DigestMD5 para Perl generan el cnonce de forma insegura. El cnonce (nonce del cliente) se genera a partir de un hash MD5 del PID, la fecha de la \u00e9poca y la funci\u00f3n rand integrada. El PID se obtendr\u00e1 de un peque\u00f1o conjunto de n\u00fameros, y la fecha de la \u00e9poca puede ser deducible si no se filtra del encabezado HTTP Date. La funci\u00f3n rand integrada no es adecuada para uso criptogr\u00e1fico. Seg\u00fan la RFC 2831, \u00abEl valor cnonce es un valor de cadena opaco entre comillas proporcionado por el cliente y utilizado tanto por el cliente como por el servidor para evitar ataques de texto plano y proporcionar autenticaci\u00f3n mutua. La seguridad de la implementaci\u00f3n depende de una buena elecci\u00f3n. Se RECOMIENDA que contenga al menos 64 bits de entrop\u00eda\u00bb.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N\",\"baseScore\":6.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"LOW\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":3.9,\"impactScore\":2.5}]},\"weaknesses\":[{\"source\":\"9b29abf9-4ab0-4765-b253-1875cd9b441e\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-338\"},{\"lang\":\"en\",\"value\":\"CWE-340\"}]}],\"references\":[{\"url\":\"https://datatracker.ietf.org/doc/html/rfc2831\",\"source\":\"9b29abf9-4ab0-4765-b253-1875cd9b441e\"},{\"url\":\"https://metacpan.org/release/SALVA/Authen-DigestMD5-0.01/source/DigestMD5.pm#L126\",\"source\":\"9b29abf9-4ab0-4765-b253-1875cd9b441e\"}]}}",
    "vulnrichment": {
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FKIE_CVE-2025-40919

Vulnerability from fkie_nvd - Published: 2025-07-16 14:15 - Updated: 2025-07-16 21:15

Severity ?

6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Summary

References

	URL	Tags
	9b29abf9-4ab0-4765-b253-1875cd9b441e	https://datatracker.ietf.org/doc/html/rfc2831
	9b29abf9-4ab0-4765-b253-1875cd9b441e	https://metacpan.org/release/SALVA/Authen-DigestMD5-0.01/source/DigestMD5.pm#L126

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Authen::DigestMD5 versions 0.01 through 0.02 for Perl generate 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 depends on a good choice. It is RECOMMENDED that it contain at least 64 bits of entropy.\""
    },
    {
      "lang": "es",
      "value": "Las versiones 0.01 a 0.02 de Authen::DigestMD5 para Perl generan el cnonce de forma insegura. El cnonce (nonce del cliente) se genera a partir de un hash MD5 del PID, la fecha de la \u00e9poca y la funci\u00f3n rand integrada. El PID se obtendr\u00e1 de un peque\u00f1o conjunto de n\u00fameros, y la fecha de la \u00e9poca puede ser deducible si no se filtra del encabezado HTTP Date. La funci\u00f3n rand integrada no es adecuada para uso criptogr\u00e1fico. Seg\u00fan la RFC 2831, \u00abEl valor cnonce es un valor de cadena opaco entre comillas proporcionado por el cliente y utilizado tanto por el cliente como por el servidor para evitar ataques de texto plano y proporcionar autenticaci\u00f3n mutua. La seguridad de la implementaci\u00f3n depende de una buena elecci\u00f3n. Se RECOMIENDA que contenga al menos 64 bits de entrop\u00eda\u00bb."
    }
  ],
  "id": "CVE-2025-40919",
  "lastModified": "2025-07-16T21:15:27.623",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "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"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 2.5,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
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  "published": "2025-07-16T14:15:25.480",
  "references": [
    {
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "url": "https://datatracker.ietf.org/doc/html/rfc2831"
    },
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      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "url": "https://metacpan.org/release/SALVA/Authen-DigestMD5-0.01/source/DigestMD5.pm#L126"
    }
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  "sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
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          "lang": "en",
          "value": "CWE-338"
        },
        {
          "lang": "en",
          "value": "CWE-340"
        }
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      "type": "Secondary"
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}

GHSA-42F3-32Q6-X99R

Vulnerability from github – Published: 2025-07-16 15:32 – Updated: 2025-07-16 21:30

Details

Authen::DigestMD5 versions 0.01 through 0.02 for Perl generate the cnonce insecurely.

The 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.

According 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 depends on a good choice. It is RECOMMENDED that it contain at least 64 bits of entropy."

Severity ?

6.5 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2025-40919"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-338"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-07-16T14:15:25Z",
    "severity": "MODERATE"
  },
  "details": "Authen::DigestMD5 versions 0.01 through 0.02 for Perl generate 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 depends on a good choice. It is RECOMMENDED that it contain at least 64 bits of entropy.\"",
  "id": "GHSA-42f3-32q6-x99r",
  "modified": "2025-07-16T21:30:35Z",
  "published": "2025-07-16T15:32:33Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-40919"
    },
    {
      "type": "WEB",
      "url": "https://datatracker.ietf.org/doc/html/rfc2831"
    },
    {
      "type": "WEB",
      "url": "https://metacpan.org/release/SALVA/Authen-DigestMD5-0.01/source/DigestMD5.pm#L126"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
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.
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.

Detection rules are retrieved from Rulezet.

Action not permitted

CVE-2025-40919 (GCVE-0-2025-40919)

FKIE_CVE-2025-40919

GHSA-42F3-32Q6-X99R

Tags

Sightings

Nomenclature