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CVE-2007-4521

Status: ModifiedMedium (5)—

Asterisk Open Source 1.4.5 through 1.4.11, when configured to use an IMAP voicemail storage backend, allows remote attackers to cause a denial of service via an e-mail with an "invalid/corrupted" MIME body, which triggers a crash when the recipient listens to voicemail.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (1)

Asterisk — Asterisk

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2007-4521",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "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": "2007-08-28T01:17:00.000",
  "references": [
    {
      "url": "http://downloads.digium.com/pub/asa/AST-2007-021.html",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://secunia.com/advisories/26601",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "http://secunia.com/advisories/26602",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "http://securityreason.com/securityalert/3065",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.securityfocus.com/archive/1/477729/100/0/threaded",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.securityfocus.com/bid/25438",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.securitytracker.com/id?1018606",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.vupen.com/english/advisories/2007/2978",
      "source": "cve@mitre.org"
    },
    {
      "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/36261",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://downloads.digium.com/pub/asa/AST-2007-021.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://secunia.com/advisories/26601",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://secunia.com/advisories/26602",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://securityreason.com/securityalert/3065",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.securityfocus.com/archive/1/477729/100/0/threaded",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.securityfocus.com/bid/25438",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.securitytracker.com/id?1018606",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.vupen.com/english/advisories/2007/2978",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/36261",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-Other"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Asterisk Open Source 1.4.5 through 1.4.11, when configured to use an IMAP voicemail storage backend, allows remote attackers to cause a denial of service via an e-mail with an \"invalid/corrupted\" MIME body, which triggers a crash when the recipient listens to voicemail."
    },
    {
      "lang": "es",
      "value": "Asterisk Open Source 1.4.5 hasta la 1.4.11, cuando la configuración utiliza un \t\r\nalmacenamiento de correo por voz (voicemail) del IMAP backend, permite a atacantes remotos provocar denegación de servicio a través de un correo electrónico con un cuerpo MIME \" \"inválido/corrupto\", lo cual dispara una caida cuando el recipiente escucha en el correo por voz (voicemail)."
    }
  ],
  "lastModified": "2026-06-16T22:44:15.173",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:asterisk:asterisk:1.4.5:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "0F4BA849-E092-404A-92CD-44C2D99AE971"
            },
            {
              "criteria": "cpe:2.3:a:asterisk:asterisk:1.4.6:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "2C7014B4-1860-49AD-9469-9954C3CC01C0"
            },
            {
              "criteria": "cpe:2.3:a:asterisk:asterisk:1.4.7:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "3D1F0056-0945-476C-982E-7B41EB420A99"
            },
            {
              "criteria": "cpe:2.3:a:asterisk:asterisk:1.4.8:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "A53DEC9D-B288-42CD-9387-57315AC98D72"
            },
            {
              "criteria": "cpe:2.3:a:asterisk:asterisk:1.4.9:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "89C1F33F-27B6-4C56-92FF-EB2861ABBC22"
            },
            {
              "criteria": "cpe:2.3:a:asterisk:asterisk:1.4.10:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "64E07CF3-073D-4705-96A6-13367D4F5CAA"
            },
            {
              "criteria": "cpe:2.3:a:asterisk:asterisk:1.4.11:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "18D19CB0-E3D7-40DB-B0C0-B62BB6075267"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "cve@mitre.org"
}