CVE-2015-6525

Estado: ModificadaAlta (7.5)—

Multiple integer overflows in the evbuffer API in Libevent 2.0.x before 2.0.22 and 2.1.x before 2.1.5-beta allow context-dependent attackers to cause a denial of service or possibly have other unspecified impact via "insanely large inputs" to the (1) evbuffer_add, (2) evbuffer_prepend, (3) evbuffer_expand, (4) exbuffer_reserve_space, or (5) evbuffer_read function, which triggers a heap-based buffer overflow or an infinite loop. NOTE: this identifier was SPLIT from CVE-2014-6272 per ADT3 due to different affected versions.

CVSS

Versión: 2.0
Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P
Puntuación base: 7.5

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 4.81%
Percentil entre todas las CVEs puntuadas: 92
Fecha de la puntuación: 6/10/2026

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 (2)

Debian — Debian Linux Libevent Project — Libevent

CWE

CWE-189

Referencias

JSON original (NVD)

Mostrar

{
  "id": "CVE-2015-6525",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 7.5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2015-08-24T14:59:14.133",
  "references": [
    {
      "url": "http://archives.seul.org/libevent/users/Jan-2015/msg00010.html",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.debian.org/security/2015/dsa-3119",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://archives.seul.org/libevent/users/Jan-2015/msg00010.html",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.debian.org/security/2015/dsa-3119",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-189"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Multiple integer overflows in the evbuffer API in Libevent 2.0.x before 2.0.22 and 2.1.x before 2.1.5-beta allow context-dependent attackers to cause a denial of service or possibly have other unspecified impact via \"insanely large inputs\" to the (1) evbuffer_add, (2) evbuffer_prepend, (3) evbuffer_expand, (4) exbuffer_reserve_space, or (5) evbuffer_read function, which triggers a heap-based buffer overflow or an infinite loop.  NOTE: this identifier was SPLIT from CVE-2014-6272 per ADT3 due to different affected versions."
    },
    {
      "lang": "es",
      "value": "Vulnerabilidad de desbordamientos de entero múltiple en la API evbuffer en Libevent 2.0.x en versiones anteriores a 2.0.22 y 2.1.x en versiones anteriores a 2.1.5-beta, permite a atacantes dependientes del contexto causar una denegación de servicio o posiblemente tener otro impacto no especificado a través de 'entradas increíblemente grandes' en la función (1) evbuffer_add, (2) evbuffer_prepend, (3) evbuffer_expand, (4) exbuffer_reserve_space o (5) evbuffer_read, lo que desencadena un desbordamiento de buffer basado en memoria dinámica o un bucle infinito. NOTA: este identificador ha sido SEPARADO de CVE-2014-6272 por ADT3 debido a las diferentes versiones afectadas."
    }
  ],
  "lastModified": "2026-06-17T00:31:00.843",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:debian:debian_linux:7.1:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "7B21E9A8-CE63-42C2-A11A-94D977A96DF1"
            }
          ],
          "operator": "OR"
        }
      ]
    },
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:libevent_project:libevent:2.0.1:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "C0D7F7F3-5FA4-4812-B52E-A3A98BB395F4"
            },
            {
              "criteria": "cpe:2.3:a:libevent_project:libevent:2.0.2:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "9CDEE68F-FAE7-4F6A-BAE4-CB749459FC53"
            },
            {
              "criteria": "cpe:2.3:a:libevent_project:libevent:2.0.3:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "0F7716AC-3D51-4987-90B1-814ACA065932"
            },
            {
              "criteria": "cpe:2.3:a:libevent_project:libevent:2.0.4:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "31792597-A8B3-4F22-9013-2103AA0170C0"
            },
            {
              "criteria": "cpe:2.3:a:libevent_project:libevent:2.0.5:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "9CDB0FC3-958E-4E9E-A366-8661BF84D588"
            },
            {
              "criteria": "cpe:2.3:a:libevent_project:libevent:2.0.6:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "6598FFC5-6C18-487B-BEA5-9D291A5D4EA1"
            },
            {
              "criteria": "cpe:2.3:a:libevent_project:libevent:2.0.7:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "412E95EF-906D-4523-9820-6D145EDFA00D"
            },
            {
              "criteria": "cpe:2.3:a:libevent_project:libevent:2.0.8:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "CA715BA0-A989-407D-B5CA-B288D470D889"
            },
            {
              "criteria": "cpe:2.3:a:libevent_project:libevent:2.0.9:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "5F7C2E29-43FF-4539-B952-3FED67779579"
            },
            {
              "criteria": "cpe:2.3:a:libevent_project:libevent:2.0.10:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "6EF813B8-EEF9-425B-90B7-944E3FD3A03E"
            },
            {
              "criteria": "cpe:2.3:a:libevent_project:libevent:2.0.11:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "F264AD63-C439-4DDE-A64A-F1CC3F9EE445"
            },
            {
              "criteria": "cpe:2.3:a:libevent_project:libevent:2.0.12:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "A85D90CC-71BA-41D5-A283-221E9793CC35"
            },
            {
              "criteria": "cpe:2.3:a:libevent_project:libevent:2.0.13:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "CEF0A64A-A290-4670-A975-03A38808E2FA"
            },
            {
              "criteria": "cpe:2.3:a:libevent_project:libevent:2.0.14:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "B5E1FDA8-05D9-4368-8396-E9AED85B1919"
            },
            {
              "criteria": "cpe:2.3:a:libevent_project:libevent:2.0.15:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "D210003F-B3DE-4964-8F1F-58AB1F75AFF0"
            },
            {
              "criteria": "cpe:2.3:a:libevent_project:libevent:2.0.16:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "28B95E3A-356D-41BC-94DE-EF7018F0E430"
            },
            {
              "criteria": "cpe:2.3:a:libevent_project:libevent:2.0.17:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "1D5C29DA-FC46-40E1-84BA-3D4AA4E915E4"
            },
            {
              "criteria": "cpe:2.3:a:libevent_project:libevent:2.0.18:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "712FC1B9-F0C0-49BC-9E70-ADB2C18C442D"
            },
            {
              "criteria": "cpe:2.3:a:libevent_project:libevent:2.0.19:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "0221BF5A-0E2C-4A3D-BF78-87A971BE1936"
            },
            {
              "criteria": "cpe:2.3:a:libevent_project:libevent:2.0.20:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "BCDCBAF3-A5F9-470B-9829-C26994BFBB29"
            },
            {
              "criteria": "cpe:2.3:a:libevent_project:libevent:2.0.21:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "4DEF0BCB-FAAC-4B92-BE12-A0741FFBE9AD"
            },
            {
              "criteria": "cpe:2.3:a:libevent_project:libevent:2.1.1:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "86B978BE-1156-4C0A-A151-CC6E5ACE75BB"
            },
            {
              "criteria": "cpe:2.3:a:libevent_project:libevent:2.1.2:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "5A059287-BB94-4FC2-962B-EF1DBBF7D8FA"
            },
            {
              "criteria": "cpe:2.3:a:libevent_project:libevent:2.1.3:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "78620372-0ACD-4863-B29E-8A5E6049A538"
            },
            {
              "criteria": "cpe:2.3:a:libevent_project:libevent:2.1.4:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "64A02886-DA11-4E95-B18E-563577B7BE0A"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "cve@mitre.org"
}