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CVE-2018-20178

Estado: ModificadaAlta (7.5)—

rdesktop, en versiones hasta e incluyendo la v1.8.3, contiene una lectura fuera de límites en la función process_demand_active(), que resulta en una denegación de servicio (segfault).

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)

Debian — Debian LinuxRdesktop — Rdesktop

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2018-20178",
  "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
      }
    ],
    "cvssMetricV30": [
      {
        "type": "Primary",
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        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.0",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2019-03-15T18:29:00.487",
  "references": [
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      "url": "http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00040.html",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.securityfocus.com/bid/106938",
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        "VDB Entry"
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      "source": "cve@mitre.org"
    },
    {
      "url": "https://github.com/rdesktop/rdesktop/commit/4dca546d04321a610c1835010b5dad85163b65e1",
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      "tags": [
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      "source": "cve@mitre.org"
    },
    {
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      "tags": [
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      "source": "cve@mitre.org"
    },
    {
      "url": "https://security.gentoo.org/glsa/201903-06",
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      "source": "cve@mitre.org"
    },
    {
      "url": "https://www.debian.org/security/2019/dsa-4394",
      "tags": [
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    {
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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      "tags": [
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        "VDB Entry"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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    {
      "url": "https://github.com/rdesktop/rdesktop/commit/4dca546d04321a610c1835010b5dad85163b65e1",
      "tags": [
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      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://research.checkpoint.com/reverse-rdp-attack-code-execution-on-rdp-clients/",
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
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      "url": "https://security.gentoo.org/glsa/201903-06",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.debian.org/security/2019/dsa-4394",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-125"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "rdesktop versions up to and including v1.8.3 contain an Out-Of-Bounds Read in the function process_demand_active() that results in a Denial of Service (segfault)."
    },
    {
      "lang": "es",
      "value": "rdesktop, en versiones hasta e incluyendo la v1.8.3, contiene una lectura fuera de límites en la función process_demand_active(), que resulta en una denegación de servicio (segfault)."
    }
  ],
  "lastModified": "2026-06-17T01:52:24.523",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "vulnerable": true,
              "matchCriteriaId": "223ED7FC-79EF-4324-82AE-D3794128C7A3",
              "versionEndIncluding": "1.8.3"
            }
          ],
          "operator": "OR"
        }
      ]
    },
    {
      "nodes": [
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          "cpeMatch": [
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            },
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  "sourceIdentifier": "cve@mitre.org"
}