ubuntu-cve-2021-36081
Vulnerability from osv_ubuntu
Published
2021-07-01 03:15
Modified
2026-04-22 07:40
Summary
Details

Tesseract OCR 5.0.0-alpha-20201231 has a one_ell_conflict use-after-free during a strpbrk call.

Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libtesseract4",
            "binary_version": "4.1.1-2build2"
          },
          {
            "binary_name": "tesseract-ocr",
            "binary_version": "4.1.1-2build2"
          },
          {
            "binary_name": "tesseract-ocr-all",
            "binary_version": "4.1.1-2build2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "tesseract",
        "purl": "pkg:deb/ubuntu/tesseract@4.1.1-2build2?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.1.0-1",
        "4.1.0-2",
        "4.1.1-1",
        "4.1.1-2",
        "4.1.1-2build1",
        "4.1.1-2build2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libtesseract4",
            "binary_version": "4.1.1-2.1build1"
          },
          {
            "binary_name": "tesseract-ocr",
            "binary_version": "4.1.1-2.1build1"
          },
          {
            "binary_name": "tesseract-ocr-all",
            "binary_version": "4.1.1-2.1build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "tesseract",
        "purl": "pkg:deb/ubuntu/tesseract@4.1.1-2.1build1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.1.1-2.1",
        "4.1.1-2.1build1"
      ]
    }
  ],
  "aliases": [],
  "details": "Tesseract OCR 5.0.0-alpha-20201231 has a one_ell_conflict use-after-free during a strpbrk call.",
  "id": "UBUNTU-CVE-2021-36081",
  "modified": "2026-04-22T07:40:06Z",
  "published": "2021-07-01T03:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-36081"
    },
    {
      "type": "REPORT",
      "url": "https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=29698"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/google/oss-fuzz-vulns/blob/main/vulns/tesseract-ocr/OSV-2021-211.yaml"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/tesseract-ocr/tesseract/commit/e6f15621c2ab2ecbfabf656942d8ef66f03b2d55"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2021-36081"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2021-36081"
  ]
}



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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 patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.