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CVE-2019-8259

Estado: ModificadaAlta (7.5)—

UltraVNC revision 1198 contains multiple memory leaks (CWE-655) in VNC client code, which allow an attacker to read stack memory and can be abused for information disclosure. Combined with another vulnerability, it can be used to leak stack memory and bypass ASLR. This attack appears to be exploitable via network connectivity. These vulnerabilities have been fixed in revision 1199.

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 (4)

Siemens — Sinumerik Access Mymachine/p2pSiemens — Sinumerik PCU Base Win10 Software/ipcSiemens — Sinumerik PCU Base Win7 Software/ipcUvnc — Ultravnc

CWE

Referencias

JSON original (NVD)

Mostrar
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  "id": "CVE-2019-8259",
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          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
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          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
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        "impactScore": 3.6,
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  "affected": [
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      "affectedData": [
        {
          "vendor": "UltraVNC",
          "product": "UltraVNC",
          "versions": [
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              "version": "1.2.2.3"
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  "published": "2019-03-05T15:29:00.367",
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "description": [
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          "value": "CWE-665"
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      "description": [
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          "value": "CWE-401"
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  "descriptions": [
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      "lang": "en",
      "value": "UltraVNC revision 1198 contains multiple memory leaks (CWE-655) in VNC client code, which allow an attacker to read stack memory and can be abused for information disclosure. Combined with another vulnerability, it can be used to leak stack memory and bypass ASLR. This attack appears to be exploitable via network connectivity. These vulnerabilities have been fixed in revision 1199."
    },
    {
      "lang": "es",
      "value": "UltraVNC, en su revisión 1198, contiene múltiples fugas de memoria (CWE-655) en el código del cliente VNC, lo que permite que un atacante lea memoria de la pila y puede aprovecharse para divulgar información. Si se combina con otra vulnerabilidad, puede emplearse para filtrar memoria de la pila y omitir el ASLR. Este ataque parece ser explotable mediante la conectividad de red. Esto se ha solucionado en la revisión 1199."
    }
  ],
  "lastModified": "2026-06-17T02:41:45.930",
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