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CVE-2007-5729

Status: ModifiedHigh (7.2)—

The NE2000 emulator in QEMU 0.8.2 allows local users to execute arbitrary code by writing Ethernet frames with a size larger than the MTU to the EN0_TCNT register, which triggers a heap-based buffer overflow in the slirp library, aka NE2000 "mtu" heap overflow. NOTE: some sources have used CVE-2007-1321 to refer to this issue as part of "NE2000 network driver and the socket code," but this is the correct identifier for the mtu overflow vulnerability.

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 (3)

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2007-5729",
  "cveTags": [],
  "metrics": {
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          "accessVector": "LOCAL",
          "vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C",
          "authentication": "NONE",
          "integrityImpact": "COMPLETE",
          "accessComplexity": "LOW",
          "availabilityImpact": "COMPLETE",
          "confidentialityImpact": "COMPLETE"
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        "acInsufInfo": false,
        "impactScore": 10,
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  "published": "2007-10-30T22:46:00.000",
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "description": [
        {
          "lang": "en",
          "value": "CWE-119"
        }
      ]
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  "descriptions": [
    {
      "lang": "en",
      "value": "The NE2000 emulator in QEMU 0.8.2 allows local users to execute arbitrary code by writing Ethernet frames with a size larger than the MTU to the EN0_TCNT register, which triggers a heap-based buffer overflow in the slirp library, aka NE2000 \"mtu\" heap overflow.  NOTE: some sources have used CVE-2007-1321 to refer to this issue as part of \"NE2000 network driver and the socket code,\" but this is the correct identifier for the mtu overflow vulnerability."
    },
    {
      "lang": "es",
      "value": "El emulador NE2000 en QEMU 0.8.2 permite a usuarios locales ejecutar código de su elección a través de la escritura de la estructura ethernet con un tamaño mayor que el MTU en el registro EN0_TCNT, lo cual dispara un desbordamiento de búfer basado en pila en la libreria slirp, también conocida como desbordamiento de pila NE2000 \"mtu\". NOTA: algunas fuentes han utilizado CVE-2007-1321 para referenciar este asunto como una parte de \"el controlado de red NE2000 y el código de conexión,\" pero este es el indentificador correcto para la vulnerabilidad de desbordamiento de mtu."
    }
  ],
  "lastModified": "2026-06-16T22:46:43.053",
  "configurations": [
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  "vendorComments": [
    {
      "comment": "Not vulnerable. This issue did not affect Xen as shipped with Red Hat Enterprise Linux 5.",
      "lastModified": "2007-11-02T00:00:00",
      "organization": "Red Hat"
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}