CVE-2007-0493

Status: ModifiedHigh (7.8)—
Use-after-free vulnerability in ISC BIND 9.3.0 up to 9.3.3, 9.4.0a1 up to 9.4.0a6, 9.4.0b1 up to 9.4.0b4, 9.4.0rc1, and 9.5.0a1 (Bind Forum only) allows remote attackers to cause a denial of service (named daemon crash) via unspecified vectors that cause named to "dereference a freed fetch context."
CVSS

Version: 2.0
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C
Base score: 7.8
Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 12%
Percentile among all scored CVEs: 96
Score date: 10/7/2026
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)

ISC — Bind
CWEs

NVD-CWE-Other
References

Raw JSON (NVD)

Show
{
  "id": "CVE-2007-0493",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 7.8,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:C",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "COMPLETE",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 6.9,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ]
  },
  "affected": [
    {
      "source": "secalert@redhat.com",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2007-01-25T20:28:00.000",
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  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-Other"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Use-after-free vulnerability in ISC BIND 9.3.0 up to 9.3.3, 9.4.0a1 up to 9.4.0a6, 9.4.0b1 up to 9.4.0b4, 9.4.0rc1, and 9.5.0a1 (Bind Forum only) allows remote attackers to cause a denial of service (named daemon crash) via unspecified vectors that cause named to \"dereference a freed fetch context.\""
    },
    {
      "lang": "es",
      "value": "Vulnerabilidad \"usar después de liberar\" en ISC BIND 9.3.0 hasta 9.3.3, 9.4.0a1 hasta 9.4.0a6, 9.4.0b1 hasta 9.4.0b4, 9.4.0rc1, y 9.5.0a1 (Bind Forum only) permite a atacantes remotos provocar una denegación de servicio (caída de demonio nombrado) mediante vectores no especificados que causan un nombrado a \"referencia a un contexto recuperado liberado\"."
    }
  ],
  "lastModified": "2026-06-16T22:35:41.090",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:isc:bind:9.3.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "847C1017-F964-4A33-BEA8-DDB202DD0FB6"
            },
            {
              "criteria": "cpe:2.3:a:isc:bind:9.3.1:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "8B0D8854-64B6-42C9-B4D2-B2AF16AC0F03"
            },
            {
              "criteria": "cpe:2.3:a:isc:bind:9.3.2:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "92F95086-3107-4C38-BB3B-7BABA9BD15C3"
            },
            {
              "criteria": "cpe:2.3:a:isc:bind:9.4.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "6D7C7524-6943-4D94-8835-0221F0F0CD63"
            },
            {
              "criteria": "cpe:2.3:a:isc:bind:9.4.0:rc1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "8F0AA9D0-9657-4E18-BF8B-45284C2D40A9"
            },
            {
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              "vulnerable": true,
              "matchCriteriaId": "32CEF8AD-9EE7-4ADA-888E-883751962529"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "vendorComments": [
    {
      "comment": "Not vulnerable. This issue did not affect the versions of ISC BIND as shipped with Red Hat Enterprise Linux 2.1, 3, or 4.",
      "lastModified": "2007-01-29T00:00:00",
      "organization": "Red Hat"
    }
  ],
  "sourceIdentifier": "secalert@redhat.com"
}