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CVE-2025-40907

Estado: AnalizadaMedia (5.3)—

FCGI versions 0.44 through 0.82, for Perl, include a vulnerable version of the FastCGI fcgi2 (aka fcgi) library.

The included FastCGI library is affected by CVE-2025-23016, causing an integer overflow (and resultant heap-based buffer overflow) via crafted nameLen or valueLen values in data to the IPC socket. This occurs in ReadParams in fcgiapp.c.

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).

Tecnologías afectadas (1)

Fastcgi — Fcgi

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2025-40907",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-40907",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-05-16T15:07:46.084885Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.3,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "LOW",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 1.4,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "affectedData": [
        {
          "repo": "https://github.com/FastCGI-Archives/fcgi2",
          "vendor": "ETHER",
          "product": "FCGI",
          "versions": [
            {
              "status": "affected",
              "version": "0.44",
              "versionType": "custom",
              "lessThanOrEqual": "0.82"
            }
          ],
          "packageName": "FCGI",
          "programFiles": [
            "libfcgi/fcgiapp.c"
          ],
          "collectionURL": "https://cpan.org/modules",
          "defaultStatus": "unaffected",
          "programRoutines": [
            {
              "name": "ReadParams()"
            }
          ]
        }
      ]
    }
  ],
  "published": "2025-05-16T13:15:52.683",
  "references": [
    {
      "url": "http://www.openwall.com/lists/oss-security/2025/04/23/4",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
    },
    {
      "url": "https://github.com/FastCGI-Archives/fcgi2/issues/67",
      "tags": [
        "Exploit",
        "Issue Tracking"
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      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
    },
    {
      "url": "https://github.com/FastCGI-Archives/fcgi2/releases/tag/2.4.5",
      "tags": [
        "Release Notes"
      ],
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
    },
    {
      "url": "https://github.com/perl-catalyst/FCGI/issues/14",
      "tags": [
        "Exploit",
        "Issue Tracking"
      ],
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
    },
    {
      "url": "https://patch-diff.githubusercontent.com/raw/FastCGI-Archives/fcgi2/pull/74.patch",
      "tags": [
        "Patch"
      ],
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
    },
    {
      "url": "https://www.synacktiv.com/en/publications/cve-2025-23016-exploiting-the-fastcgi-library",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "description": [
        {
          "lang": "en",
          "value": "CWE-122"
        },
        {
          "lang": "en",
          "value": "CWE-190"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-190"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "FCGI versions 0.44 through 0.82, for Perl, include a vulnerable version of the FastCGI fcgi2 (aka fcgi) library.\n\nThe included FastCGI library is affected by  CVE-2025-23016, causing an integer overflow (and resultant heap-based buffer overflow) via crafted nameLen or valueLen values in data to the IPC socket. This occurs in ReadParams in fcgiapp.c."
    },
    {
      "lang": "es",
      "value": "Las versiones 0.44 a 0.82 de FCGI para Perl incluyen una versión vulnerable de la librería FastCGI fcgi2 (también conocida como fcgi). Esta librería está afectada por CVE-2025-23016, lo que provoca un desbordamiento de enteros (y el consiguiente desbordamiento del búfer en el montón) mediante valores nameLen o valueLen manipulados en los datos del socket IPC. Esto ocurre en ReadParams de fcgiapp.c."
    }
  ],
  "lastModified": "2026-06-17T09:22:16.023",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:fastcgi:fcgi:*:*:*:*:*:perl:*:*",
              "vulnerable": true,
              "matchCriteriaId": "1C317242-A340-4C14-BD59-592760BCB0B6",
              "versionEndIncluding": "0.82",
              "versionStartIncluding": "0.44"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
}