GHSA-77MG-PHF5-3H8G

Vulnerability from github – Published: 2022-05-14 01:52 – Updated: 2025-11-25 18:32
VLAI?
Details

When the Mozilla Updater opens a MAR format file which contains a very long item filename, an out-of-bounds write can be triggered, leading to a potentially exploitable crash. This requires running the Mozilla Updater manually on the local system with the malicious MAR file in order to occur. This vulnerability affects Firefox < 62, Firefox ESR < 60.2, and Thunderbird < 60.2.1.

Severity ?
7.8 (High)
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2018-12379"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-787"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2018-10-18T13:29:00Z",
    "severity": "HIGH"
  },
  "details": "When the Mozilla Updater opens a MAR format file which contains a very long item filename, an out-of-bounds write can be triggered, leading to a potentially exploitable crash. This requires running the Mozilla Updater manually on the local system with the malicious MAR file in order to occur. This vulnerability affects Firefox \u003c 62, Firefox ESR \u003c 60.2, and Thunderbird \u003c 60.2.1.",
  "id": "GHSA-77mg-phf5-3h8g",
  "modified": "2025-11-25T18:32:14Z",
  "published": "2022-05-14T01:52:46Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-12379"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2018:2692"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2018:2693"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2018:3403"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2018:3458"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1473113"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2018/11/msg00011.html"
    },
    {
      "type": "WEB",
      "url": "https://security.gentoo.org/glsa/201810-01"
    },
    {
      "type": "WEB",
      "url": "https://security.gentoo.org/glsa/201811-13"
    },
    {
      "type": "WEB",
      "url": "https://www.debian.org/security/2018/dsa-4327"
    },
    {
      "type": "WEB",
      "url": "https://www.mozilla.org/security/advisories/mfsa2018-20"
    },
    {
      "type": "WEB",
      "url": "https://www.mozilla.org/security/advisories/mfsa2018-21"
    },
    {
      "type": "WEB",
      "url": "https://www.mozilla.org/security/advisories/mfsa2018-25"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/bid/105280"
    },
    {
      "type": "WEB",
      "url": "http://www.securitytracker.com/id/1041610"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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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.



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