« Volver al listado

CVE-2020-36773

Estado: ModificadaCrítica (9.8)—

Artifex Ghostscript before 9.53.0 has an out-of-bounds write and use-after-free in devices/vector/gdevtxtw.c (for txtwrite) because a single character code in a PDF document can map to more than one Unicode code point (e.g., for a ligature).

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 (1)

Artifex — Ghostscript

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2020-36773",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2020-36773",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2024-02-05T15:56:53.734454Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 9.8,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 3.9
      },
      {
        "type": "Secondary",
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 9.8,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2024-02-04T18:16:00.713",
  "references": [
    {
      "url": "https://bugs.ghostscript.com/show_bug.cgi?id=702229",
      "tags": [
        "Issue Tracking",
        "Patch"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "https://bugzilla.opensuse.org/show_bug.cgi?id=1177922",
      "tags": [
        "Issue Tracking"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "https://git.ghostscript.com/?p=ghostpdl.git%3Ba=commit%3Bh=8c7bd787defa071c96289b7da9397f673fddb874",
      "tags": [
        "Broken Link"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "https://github.com/ArtifexSoftware/ghostpdl-downloads/releases/tag/gs9530",
      "tags": [
        "Release Notes"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "https://bugs.ghostscript.com/show_bug.cgi?id=702229",
      "tags": [
        "Issue Tracking",
        "Patch"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://bugzilla.opensuse.org/show_bug.cgi?id=1177922",
      "tags": [
        "Issue Tracking"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://git.ghostscript.com/?p=ghostpdl.git%3Ba=commit%3Bh=8c7bd787defa071c96289b7da9397f673fddb874",
      "tags": [
        "Broken Link"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://github.com/ArtifexSoftware/ghostpdl-downloads/releases/tag/gs9530",
      "tags": [
        "Release Notes"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        },
        {
          "lang": "en",
          "value": "CWE-787"
        }
      ]
    },
    {
      "type": "Secondary",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        },
        {
          "lang": "en",
          "value": "CWE-787"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Artifex Ghostscript before 9.53.0 has an out-of-bounds write and use-after-free in devices/vector/gdevtxtw.c (for txtwrite) because a single character code in a PDF document can map to more than one Unicode code point (e.g., for a ligature)."
    },
    {
      "lang": "es",
      "value": "Artifex Ghostscript anterior a 9.53.0 tiene una escritura y un use-after-free fuera de los límites en devices/vector/gdevtxtw.c (para txtwrite) porque un código de un solo carácter en un documento PDF se puede asignar a más de un punto de código Unicode. (por ejemplo, para una ligadura)."
    }
  ],
  "lastModified": "2026-06-17T03:16:11.957",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:artifex:ghostscript:9.51:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "C18E63CE-B2D5-44A2-89E0-B2C6A3554D79"
            },
            {
              "criteria": "cpe:2.3:a:artifex:ghostscript:9.52:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "BF20A2FF-98ED-45EF-9263-D915D7A1953D"
            },
            {
              "criteria": "cpe:2.3:a:artifex:ghostscript:9.52.1:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "FCA9F31F-F4B8-43E6-A747-BDC189BADD05"
            },
            {
              "criteria": "cpe:2.3:a:artifex:ghostscript:9.53.0:rc1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "E6FE7E73-AE7B-42D4-8E83-17249CC9F46A"
            },
            {
              "criteria": "cpe:2.3:a:artifex:ghostscript:9.53.0:rc2:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "AC033F01-8AF9-4B10-9789-35255739A232"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "cve@mitre.org"
}