{
  "cveId": "CVE-2023-4255",
  "url": "https://patchblox.com/security/cve/CVE-2023-4255",
  "summary": "CVE-2023-4255 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2023-4255, released December 21, 2023. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "w3m: An out-of-bounds write issue has been discovered in the backspace handling of the checkType() function in etc.c withi...",
  "description": "An out-of-bounds write issue has been discovered in the backspace handling of the checkType() function in etc.c within the W3M application. This vulnerability is triggered by supplying a specially crafted HTML file to the w3m binary. Exploitation of this flaw could lead to application crashes, resulting in a denial of service condition.",
  "published": "2023-12-21T16:15:10Z",
  "severity": "medium",
  "cvss": 5.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
  "epss": 0.00322,
  "epssPercentile": 0.25349,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "w3m",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "0.5.3\u002Bgit20230121-2.1",
      "fix": "DEBIAN-CVE-2023-4255",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-4255",
      "released": "2023-12-21T16:15:10Z"
    },
    {
      "platform": "linux",
      "product": "w3m",
      "release": "Debian 14",
      "fixedVersion": "0.5.3\u002Bgit20230121-2.1",
      "fix": "DEBIAN-CVE-2023-4255",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-4255",
      "released": "2023-12-21T16:15:10Z"
    },
    {
      "platform": "linux",
      "product": "w3m",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "0.5.3-36ubuntu0.1\u002Besm1",
      "fix": "w3m 0.5.3-36ubuntu0.1\u002Besm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-w3m-0.5.3-36ubuntu0.1-esm1",
      "released": "2024-01-01T16:00:00Z"
    },
    {
      "platform": "linux",
      "product": "w3m",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "0.5.3-37ubuntu0.2",
      "fix": "w3m 0.5.3-37ubuntu0.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-w3m-0.5.3-37ubuntu0.2",
      "released": "2024-01-01T16:00:00Z"
    },
    {
      "platform": "linux",
      "product": "w3m",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "0.5.3\u002Bgit20210102-6ubuntu0.2",
      "fix": "w3m 0.5.3\u002Bgit20210102-6ubuntu0.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-w3m-0.5.3-git20210102-6ubuntu0.2",
      "released": "2024-01-01T16:00:00Z"
    },
    {
      "platform": "linux",
      "product": "w3m",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "0.5.3\u002Bgit20230121-2ubuntu1",
      "fix": "w3m 0.5.3\u002Bgit20230121-2ubuntu1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-w3m-0.5.3-git20230121-2ubuntu1",
      "released": "2024-01-01T16:00:00Z"
    },
    {
      "platform": "linux",
      "product": "w3m",
      "release": "Ubuntu 24.10 (oracular)",
      "fixedVersion": "0.5.3\u002Bgit20230121-2ubuntu1",
      "fix": "w3m 0.5.3\u002Bgit20230121-2ubuntu1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-oracular-w3m-0.5.3-git20230121-2ubuntu1",
      "released": "2024-01-02T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "w3m",
      "release": "Ubuntu 25.04 (plucky)",
      "fixedVersion": "0.5.3\u002Bgit20230121-2ubuntu1",
      "fix": "w3m 0.5.3\u002Bgit20230121-2ubuntu1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-plucky-w3m-0.5.3-git20230121-2ubuntu1",
      "released": "2024-01-02T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "w3m-img",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "0.5.3-36ubuntu0.1\u002Besm1",
      "fix": "w3m-img 0.5.3-36ubuntu0.1\u002Besm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-w3m-img-0.5.3-36ubuntu0.1-esm1",
      "released": "2024-01-01T16:00:00Z"
    },
    {
      "platform": "linux",
      "product": "w3m-img",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "0.5.3-37ubuntu0.2",
      "fix": "w3m-img 0.5.3-37ubuntu0.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-w3m-img-0.5.3-37ubuntu0.2",
      "released": "2024-01-01T16:00:00Z"
    },
    {
      "platform": "linux",
      "product": "w3m-img",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "0.5.3\u002Bgit20210102-6ubuntu0.2",
      "fix": "w3m-img 0.5.3\u002Bgit20210102-6ubuntu0.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-w3m-img-0.5.3-git20210102-6ubuntu0.2",
      "released": "2024-01-01T16:00:00Z"
    },
    {
      "platform": "linux",
      "product": "w3m-img",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "0.5.3\u002Bgit20230121-2ubuntu1",
      "fix": "w3m-img 0.5.3\u002Bgit20230121-2ubuntu1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-w3m-img-0.5.3-git20230121-2ubuntu1",
      "released": "2024-01-01T16:00:00Z"
    },
    {
      "platform": "linux",
      "product": "w3m-img",
      "release": "Ubuntu 24.10 (oracular)",
      "fixedVersion": "0.5.3\u002Bgit20230121-2ubuntu1",
      "fix": "w3m-img 0.5.3\u002Bgit20230121-2ubuntu1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-oracular-w3m-img-0.5.3-git20230121-2ubuntu1",
      "released": "2024-01-02T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "w3m-img",
      "release": "Ubuntu 25.04 (plucky)",
      "fixedVersion": "0.5.3\u002Bgit20230121-2ubuntu1",
      "fix": "w3m-img 0.5.3\u002Bgit20230121-2ubuntu1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-plucky-w3m-img-0.5.3-git20230121-2ubuntu1",
      "released": "2024-01-02T00:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}