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CVE-2009-2049

Estado: ModificadaMedia (5.4)—

Cisco IOS v12.0(32)S12 hasta v12.0(32)S13 y v12.0(33)S3 hasta v12.0(33)S4, v12.0(32)SY8 hasta v12.0(32)SY9, v12.2(33)SXI1 hasta v12.2(33)SXI2, v12.2XNC hasta v12.2(33)XNC2, v12.2XND hasta v12.2(33)XND1, y v12.4(24)T1; y IOS XE v2.3 hasta v2.3.1t y v2.4 hasta v2.4.0; cuando el enrutado RFC4893 BGP está habilitado, lo que permite a los atacantes remoto causar una denegación de servicio (recarga del dispositivo) usando un par RFC4271 para enviar una actualización malformado, también conocido como Bud ID CSCta33973.

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 (2)

Cisco — IOSCisco — IOS XE

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2009-2049",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 5.4,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:H/Au:N/C:N/I:N/A:C",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "HIGH",
          "availabilityImpact": "COMPLETE",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 6.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 4.9,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ]
  },
  "affected": [
    {
      "source": "psirt@cisco.com",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2009-07-30T18:30:00.233",
  "references": [
    {
      "url": "http://secunia.com/advisories/36046",
      "source": "psirt@cisco.com"
    },
    {
      "url": "http://www.cisco.com/en/US/products/products_security_advisory09186a0080aea4c9.shtml",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "psirt@cisco.com"
    },
    {
      "url": "http://www.securityfocus.com/bid/35860",
      "source": "psirt@cisco.com"
    },
    {
      "url": "http://www.securitytracker.com/id?1022619",
      "source": "psirt@cisco.com"
    },
    {
      "url": "http://www.vupen.com/english/advisories/2009/2082",
      "source": "psirt@cisco.com"
    },
    {
      "url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6853",
      "source": "psirt@cisco.com"
    },
    {
      "url": "http://secunia.com/advisories/36046",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.cisco.com/en/US/products/products_security_advisory09186a0080aea4c9.shtml",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.securityfocus.com/bid/35860",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.securitytracker.com/id?1022619",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.vupen.com/english/advisories/2009/2082",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6853",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-16"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Cisco IOS 12.0(32)S12 through 12.0(32)S13 and 12.0(33)S3 through 12.0(33)S4, 12.0(32)SY8 through 12.0(32)SY9, 12.2(33)SXI1 through 12.2(33)SXI2, 12.2XNC before 12.2(33)XNC2, 12.2XND before 12.2(33)XND1, and 12.4(24)T1; and IOS XE 2.3 through 2.3.1t and 2.4 through 2.4.0; when RFC4893 BGP routing is enabled, allows remote attackers to cause a denial of service (device reload) by using an RFC4271 peer to send a malformed update, aka Bug ID CSCta33973."
    },
    {
      "lang": "es",
      "value": "Cisco IOS v12.0(32)S12 hasta v12.0(32)S13 y v12.0(33)S3 hasta v12.0(33)S4, v12.0(32)SY8 hasta v12.0(32)SY9, v12.2(33)SXI1 hasta v12.2(33)SXI2, v12.2XNC hasta v12.2(33)XNC2, v12.2XND hasta v12.2(33)XND1, y v12.4(24)T1; y IOS XE v2.3 hasta v2.3.1t y v2.4 hasta v2.4.0; cuando el enrutado RFC4893 BGP está habilitado, lo que permite a los atacantes remoto causar una denegación de servicio (recarga del dispositivo) usando un par RFC4271 para enviar una actualización malformado, también conocido como Bud ID CSCta33973."
    }
  ],
  "lastModified": "2026-06-16T23:08:39.493",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:cisco:ios:12.0\\(32\\)s12:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "7F505B0A-E9E0-4CF3-B85B-70EEE71314F0"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:12.0\\(32\\)s13:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "ED66A91B-6429-4983-8167-07DECA601916"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:12.0\\(32\\)sy8:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "0F288884-3DB7-474D-B56B-120E2DB7975A"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:12.0\\(32\\)sy9:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "A29860C6-75E6-43A4-8BF5-E6ABF2040B0F"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:12.0\\(33\\)s3:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "AF0C8019-BDDA-4019-AF64-352EFFAC9036"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:12.0\\(33\\)s4:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "9BCFE974-9D9A-443D-A55D-6A2CBF96EC4D"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:12.2\\(33\\)sxi1:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "4627BEF7-CEEB-4CBC-8620-4D9C5A7F7C30"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:12.2\\(33\\)sxi2:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "866E9A29-97D8-41E1-81BE-73FAF1B5E2DE"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:12.2xnc:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "5D57ACB3-4ADC-4FBE-BA46-395F277B9997"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:12.2xnd:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "E2916FA5-1FFF-48FB-A079-693AD3444CC1"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:12.4\\(24\\)t1:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "2A6AD6E5-EBB0-44D8-A63C-EFF7260E4CC3"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios_xe:2.3:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "91895083-E6C5-432A-BF41-8D157E539C14"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios_xe:2.3.1t:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "57F6EF3B-2F31-4449-9B2A-9114D41BBC6A"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios_xe:2.4:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "4964AB2C-E255-4844-8DD9-FFFC9512B7C4"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios_xe:2.4.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "6D0B52CA-3834-4435-A3E1-9684A41E6405"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "psirt@cisco.com"
}