« Volver al listado

CVE-2025-66565

Estado: AnalizadaCrítica (9.3)—

Fiber Utils is a collection of common functions created for Fiber. In versions 2.0.0-rc.3 and below, when the system's cryptographic random number generator (crypto/rand) fails, both functions silently fall back to returning predictable UUID values, including the zero UUID "00000000-0000-0000-0000-000000000000". The vulnerability occurs through two related but distinct failure paths, both ultimately caused by crypto/rand.Read() failures, compromising the security of all Fiber applications using these functions for security-critical operations. This issue is fixed in version 2.0.0-rc.4.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Vulnerabilidad en librería Fiber expuesta (AV:N, PR:N, UI:N) que retorna UUIDs predecibles al fallar crypto/rand, permitiendo lectura/predicción de datos sensibles y potencial DoS por validaciones débiles.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Filter Network TrafficPrivileged Account ManagementLimit Access to Resource Over NetworkUpdate SoftwareActive Directory ConfigurationVulnerability Scanning

Tecnologías afectadas (1)

Gofiber — Utils

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2025-66565",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-66565",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-12-09T14:16:58.759199Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 9.8,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 3.9
      }
    ],
    "cvssMetricV40": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "Safety": "NOT_DEFINED",
          "version": "4.0",
          "Recovery": "NOT_DEFINED",
          "baseScore": 9.3,
          "Automatable": "NOT_DEFINED",
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "exploitMaturity": "NOT_DEFINED",
          "providerUrgency": "NOT_DEFINED",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "privilegesRequired": "NONE",
          "subIntegrityImpact": "NONE",
          "vulnIntegrityImpact": "HIGH",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "vulnAvailabilityImpact": "LOW",
          "availabilityRequirement": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "subConfidentialityImpact": "NONE",
          "vulnConfidentialityImpact": "HIGH",
          "confidentialityRequirement": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED"
        }
      }
    ]
  },
  "affected": [
    {
      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "gofiber",
          "product": "utils",
          "versions": [
            {
              "status": "affected",
              "version": "github.com/gofiber/utils <= 1.2.0"
            },
            {
              "status": "affected",
              "version": "github.com/gofiber/utils/v2 < 2.0.0-rc.4"
            }
          ]
        }
      ]
    }
  ],
  "published": "2025-12-09T16:18:21.097",
  "references": [
    {
      "url": "https://github.com/gofiber/utils/commit/6c6cf047032b9c8dff43d29f990b4b10e9b02d47",
      "tags": [
        "Patch"
      ],
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/gofiber/utils/security/advisories/GHSA-m98w-cqp3-qcqr",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/gofiber/utils/security/advisories/GHSA-m98w-cqp3-qcqr",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-252"
        },
        {
          "lang": "en",
          "value": "CWE-331"
        },
        {
          "lang": "en",
          "value": "CWE-338"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-252"
        },
        {
          "lang": "en",
          "value": "CWE-338"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Fiber Utils is a collection of common functions created for Fiber. In versions 2.0.0-rc.3 and below, when the system's cryptographic random number generator (crypto/rand) fails, both functions silently fall back to returning predictable UUID values, including the zero UUID \"00000000-0000-0000-0000-000000000000\". The vulnerability occurs through two related but distinct failure paths, both ultimately caused by crypto/rand.Read() failures, compromising the security of all Fiber applications using these functions for security-critical operations. This issue is fixed in version 2.0.0-rc.4."
    }
  ],
  "lastModified": "2026-06-17T09:57:02.433",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:gofiber:utils:*:*:*:*:*:go:*:*",
              "vulnerable": true,
              "matchCriteriaId": "0DBDBC08-F082-4844-85C8-67FDA50F1D96",
              "versionEndIncluding": "1.2.0"
            },
            {
              "criteria": "cpe:2.3:a:gofiber:utils:2.0.0:beta1:*:*:*:go:*:*",
              "vulnerable": true,
              "matchCriteriaId": "3CF06202-3EB0-4193-8AB9-E47C120CAE7A"
            },
            {
              "criteria": "cpe:2.3:a:gofiber:utils:2.0.0:beta10:*:*:*:go:*:*",
              "vulnerable": true,
              "matchCriteriaId": "CF306733-FDF8-434D-BBE7-007A6FBB2609"
            },
            {
              "criteria": "cpe:2.3:a:gofiber:utils:2.0.0:beta11:*:*:*:go:*:*",
              "vulnerable": true,
              "matchCriteriaId": "C941EF0D-AF47-4BD6-AC68-29F534E78881"
            },
            {
              "criteria": "cpe:2.3:a:gofiber:utils:2.0.0:beta12:*:*:*:go:*:*",
              "vulnerable": true,
              "matchCriteriaId": "830BFD1F-2352-4118-B757-1DC00DCAED64"
            },
            {
              "criteria": "cpe:2.3:a:gofiber:utils:2.0.0:beta13:*:*:*:go:*:*",
              "vulnerable": true,
              "matchCriteriaId": "A047A059-EF1D-48C7-B514-DF7B49538133"
            },
            {
              "criteria": "cpe:2.3:a:gofiber:utils:2.0.0:beta14:*:*:*:go:*:*",
              "vulnerable": true,
              "matchCriteriaId": "EB8029EF-619F-48C5-BA13-E67A78DA3240"
            },
            {
              "criteria": "cpe:2.3:a:gofiber:utils:2.0.0:beta2:*:*:*:go:*:*",
              "vulnerable": true,
              "matchCriteriaId": "244F7B18-D2DA-4F6B-A46B-22B91478E5C3"
            },
            {
              "criteria": "cpe:2.3:a:gofiber:utils:2.0.0:beta3:*:*:*:go:*:*",
              "vulnerable": true,
              "matchCriteriaId": "84145762-B2F9-474F-90DE-0D124EB25376"
            },
            {
              "criteria": "cpe:2.3:a:gofiber:utils:2.0.0:beta4:*:*:*:go:*:*",
              "vulnerable": true,
              "matchCriteriaId": "91DCCAA4-F9C6-4380-AAB7-08954DA3E88D"
            },
            {
              "criteria": "cpe:2.3:a:gofiber:utils:2.0.0:beta5:*:*:*:go:*:*",
              "vulnerable": true,
              "matchCriteriaId": "64BE0DDC-6247-4C85-BBA0-4BC4F7670CDB"
            },
            {
              "criteria": "cpe:2.3:a:gofiber:utils:2.0.0:beta6:*:*:*:go:*:*",
              "vulnerable": true,
              "matchCriteriaId": "7E6AC663-DFA9-4E13-BB68-BD22318DCAB6"
            },
            {
              "criteria": "cpe:2.3:a:gofiber:utils:2.0.0:beta7:*:*:*:go:*:*",
              "vulnerable": true,
              "matchCriteriaId": "F5770BB7-1D1F-40D5-ACFB-4107C5D02719"
            },
            {
              "criteria": "cpe:2.3:a:gofiber:utils:2.0.0:beta8:*:*:*:go:*:*",
              "vulnerable": true,
              "matchCriteriaId": "E37F4EC0-AAD8-4C85-9373-3FB5F51D8F52"
            },
            {
              "criteria": "cpe:2.3:a:gofiber:utils:2.0.0:beta9:*:*:*:go:*:*",
              "vulnerable": true,
              "matchCriteriaId": "3817F39A-4874-4FF3-B4F9-ACF24E185BC2"
            },
            {
              "criteria": "cpe:2.3:a:gofiber:utils:2.0.0:rc1:*:*:*:go:*:*",
              "vulnerable": true,
              "matchCriteriaId": "37B2432A-5B45-4F42-A120-86BBD5EEF5EC"
            },
            {
              "criteria": "cpe:2.3:a:gofiber:utils:2.0.0:rc2:*:*:*:go:*:*",
              "vulnerable": true,
              "matchCriteriaId": "765A2191-9DA4-4D9D-AE26-EB53FCCE76AD"
            },
            {
              "criteria": "cpe:2.3:a:gofiber:utils:2.0.0:rc3:*:*:*:go:*:*",
              "vulnerable": true,
              "matchCriteriaId": "31281C49-0A9A-4008-8458-3DD0A9F9B016"
            },
            {
              "criteria": "cpe:2.3:a:gofiber:utils:2.0.0:rc4:*:*:*:go:*:*",
              "vulnerable": true,
              "matchCriteriaId": "568DB697-4E86-4C33-AD1A-5E44E23D277F"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "security-advisories@github.com"
}