FKIE_CVE-2019-18281

Vulnerability from fkie_nvd - Published: 2019-10-23 15:15 - Updated: 2026-06-17 02:24
Severity
4.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Summary
An out-of-bounds memory access in the generateDirectionalRuns() function in qtextengine.cpp in Qt qtbase 5.11.x and 5.12.x before 5.12.5 allows attackers to cause a denial of service by crashing an application via a text file containing many directional characters.
References
cve@mitre.orghttps://bugreports.qt.io/browse/QTBUG-77819Permissions Required
cve@mitre.orghttps://bugs.launchpad.net/ubuntu/+source/qtbase-opensource-src/+bug/1848784Issue Tracking, Third Party Advisory
cve@mitre.orghttps://codereview.qt-project.org/c/qt/qtbase/+/271889Patch, Vendor Advisory
cve@mitre.orghttps://seclists.org/bugtraq/2019/Nov/4Mailing List, Third Party Advisory
cve@mitre.orghttps://security.gentoo.org/glsa/202003-60
cve@mitre.orghttps://usn.ubuntu.com/4275-1/
cve@mitre.orghttps://www.debian.org/security/2019/dsa-4556Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://bugreports.qt.io/browse/QTBUG-77819Permissions Required
af854a3a-2127-422b-91ae-364da2661108https://bugs.launchpad.net/ubuntu/+source/qtbase-opensource-src/+bug/1848784Issue Tracking, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://codereview.qt-project.org/c/qt/qtbase/+/271889Patch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://seclists.org/bugtraq/2019/Nov/4Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://security.gentoo.org/glsa/202003-60
af854a3a-2127-422b-91ae-364da2661108https://usn.ubuntu.com/4275-1/
af854a3a-2127-422b-91ae-364da2661108https://www.debian.org/security/2019/dsa-4556Third Party Advisory
Impacted products
Vendor Product Version
qt qtbase *
qt qtbase *
debian debian_linux 9.0
debian debian_linux 10.0
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "source": "cve@mitre.org"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:qt:qtbase:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "FD861631-0CDD-4E71-A7CC-7860E4E7FF04",
              "versionEndIncluding": "5.11.3",
              "versionStartIncluding": "5.11.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:qt:qtbase:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "E5FC79C2-1DE1-4883-BED2-4BAE9EC35642",
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              "matchCriteriaId": "DEECE5FC-CACF-4496-A3E7-164736409252",
              "vulnerable": true
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              "matchCriteriaId": "07B237A9-69A3-4A9C-9DA0-4E06BD37AE73",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "An out-of-bounds memory access in the generateDirectionalRuns() function in qtextengine.cpp in Qt qtbase 5.11.x and 5.12.x before 5.12.5 allows attackers to cause a denial of service by crashing an application via a text file containing many directional characters."
    },
    {
      "lang": "es",
      "value": "Un acceso a memoria fuera de l\u00edmites en la funci\u00f3n generateDirectionalRuns() en el archivo qtextengine.cpp en Qt qtbase versiones 5.11.x y versiones 5.12.x anteriores a 5.12.5, permite a atacantes causar una denegaci\u00f3n de servicio al bloquear una aplicaci\u00f3n por medio de un archivo de texto que contiene muchos caracteres direccionales."
    }
  ],
  "id": "CVE-2019-18281",
  "lastModified": "2026-06-17T02:24:45.027",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "MEDIUM",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 4.3,
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 8.6,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": true
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "LOW",
          "baseScore": 4.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L",
          "version": "3.1"
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        "impactScore": 1.4,
        "source": "nvd@nist.gov",
        "type": "Primary"
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  },
  "published": "2019-10-23T15:15:14.343",
  "references": [
    {
      "source": "cve@mitre.org",
      "tags": [
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      ],
      "url": "https://bugreports.qt.io/browse/QTBUG-77819"
    },
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    },
    {
      "source": "cve@mitre.org",
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    },
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    },
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    },
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      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
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      ],
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    },
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    },
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  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-119"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.