{
  "cveId": "CVE-2018-12393",
  "url": "https://patchblox.com/security/cve/CVE-2018-12393",
  "summary": "CVE-2018-12393 is fixed in 12 products on 1 platform, first by firefox 63.0\u002Bbuild2-0ubuntu0.18.04.2, released October 23, 2018. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "firefox: A potential vulnerability was found in 32-bit builds where an integer overflow during the conversion of scripts to an...",
  "description": "A potential vulnerability was found in 32-bit builds where an integer overflow during the conversion of scripts to an internal UTF-16 representation could result in allocating a buffer too small for the conversion. This leads to a possible out-of-bounds write. *Note: 64-bit builds are not vulnerable to this issue.*. This vulnerability affects Firefox \u0026lt; 63, Firefox ESR \u0026lt; 60.3, and Thunderbird \u0026lt; 60.3.",
  "published": "2018-10-23T17:00:00Z",
  "severity": "Medium",
  "epss": 0.03924,
  "epssPercentile": 0.90417,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "firefox",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "63.0\u002Bbuild2-0ubuntu0.18.04.2",
      "fix": "firefox 63.0\u002Bbuild2-0ubuntu0.18.04.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-firefox-63.0-build2-0ubuntu0.18.04.2",
      "released": "2018-10-23T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "firefox-globalmenu",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "63.0\u002Bbuild2-0ubuntu0.18.04.2",
      "fix": "firefox-globalmenu 63.0\u002Bbuild2-0ubuntu0.18.04.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-firefox-globalmenu-63.0-build2-0ubuntu0.18.04.2",
      "released": "2018-10-23T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "firefox-mozsymbols",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "63.0\u002Bbuild2-0ubuntu0.18.04.2",
      "fix": "firefox-mozsymbols 63.0\u002Bbuild2-0ubuntu0.18.04.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-firefox-mozsymbols-63.0-build2-0ubuntu0.18.04.2",
      "released": "2018-10-23T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "firefox-testsuite",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "63.0\u002Bbuild2-0ubuntu0.18.04.2",
      "fix": "firefox-testsuite 63.0\u002Bbuild2-0ubuntu0.18.04.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-firefox-testsuite-63.0-build2-0ubuntu0.18.04.2",
      "released": "2018-10-23T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "thunderbird",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1:60.4.0\u002Bbuild2-0ubuntu0.18.04.1",
      "fix": "thunderbird 1:60.4.0\u002Bbuild2-0ubuntu0.18.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-thunderbird-1-60.4.0-build2-0ubuntu0.18.04.1",
      "released": "2019-01-23T16:00:00Z"
    },
    {
      "platform": "linux",
      "product": "thunderbird-globalmenu",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1:60.4.0\u002Bbuild2-0ubuntu0.18.04.1",
      "fix": "thunderbird-globalmenu 1:60.4.0\u002Bbuild2-0ubuntu0.18.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-thunderbird-globalmenu-1-60.4.0-build2-0ubuntu0.18.04.1",
      "released": "2019-01-23T16:00:00Z"
    },
    {
      "platform": "linux",
      "product": "thunderbird-gnome-support",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1:60.4.0\u002Bbuild2-0ubuntu0.18.04.1",
      "fix": "thunderbird-gnome-support 1:60.4.0\u002Bbuild2-0ubuntu0.18.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-thunderbird-gnome-support-1-60.4.0-build2-0ubuntu0.18.04.1",
      "released": "2019-01-23T16:00:00Z"
    },
    {
      "platform": "linux",
      "product": "thunderbird-mozsymbols",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1:60.4.0\u002Bbuild2-0ubuntu0.18.04.1",
      "fix": "thunderbird-mozsymbols 1:60.4.0\u002Bbuild2-0ubuntu0.18.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-thunderbird-mozsymbols-1-60.4.0-build2-0ubuntu0.18.04.1",
      "released": "2019-01-23T16:00:00Z"
    },
    {
      "platform": "linux",
      "product": "thunderbird-testsuite",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1:60.4.0\u002Bbuild2-0ubuntu0.18.04.1",
      "fix": "thunderbird-testsuite 1:60.4.0\u002Bbuild2-0ubuntu0.18.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-thunderbird-testsuite-1-60.4.0-build2-0ubuntu0.18.04.1",
      "released": "2019-01-23T16:00:00Z"
    },
    {
      "platform": "linux",
      "product": "xul-ext-calendar-timezones",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1:60.4.0\u002Bbuild2-0ubuntu0.18.04.1",
      "fix": "xul-ext-calendar-timezones 1:60.4.0\u002Bbuild2-0ubuntu0.18.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-xul-ext-calendar-timezones-1-60.4.0-build2-0ubuntu0.18.04.1",
      "released": "2019-01-23T16:00:00Z"
    },
    {
      "platform": "linux",
      "product": "xul-ext-gdata-provider",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1:60.4.0\u002Bbuild2-0ubuntu0.18.04.1",
      "fix": "xul-ext-gdata-provider 1:60.4.0\u002Bbuild2-0ubuntu0.18.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-xul-ext-gdata-provider-1-60.4.0-build2-0ubuntu0.18.04.1",
      "released": "2019-01-23T16:00:00Z"
    },
    {
      "platform": "linux",
      "product": "xul-ext-lightning",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1:60.4.0\u002Bbuild2-0ubuntu0.18.04.1",
      "fix": "xul-ext-lightning 1:60.4.0\u002Bbuild2-0ubuntu0.18.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-xul-ext-lightning-1-60.4.0-build2-0ubuntu0.18.04.1",
      "released": "2019-01-23T16:00:00Z"
    }
  ],
  "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"
  }
}