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Mozilla Thunderbird < 78.3

🗓️ 18 Nov 2025 00:00:00Reported by TenableType 
nessus
 nessus
🔗 www.tenable.com👁 1 Views

Thunderbird before 78.3 on macOS has use-after-free, open redirect, SVG onload, and memory safety bugs.

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Refs
Code
#%NASL_MIN_LEVEL 80900
## 
# (C) Tenable, Inc.
#                                  
# The descriptive text and package checks in this plugin were
# extracted from Mozilla Foundation Security Advisory mfsa2020-44.
# The text itself is copyright (C) Mozilla Foundation.
## 

include('compat.inc');

if (description)
{
  script_id(275651);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/11/18");

  script_cve_id(
    "CVE-2020-15673",
    "CVE-2020-15676",
    "CVE-2020-15677",
    "CVE-2020-15678"
  );

  script_name(english:"Mozilla Thunderbird < 78.3");

  script_set_attribute(attribute:"synopsis", value:
"A mail client installed on the remote macOS or Mac OS X host is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The version of Thunderbird installed on the remote macOS or Mac OS X host is prior to 78.3. It is, therefore, affected
by multiple vulnerabilities as referenced in the mfsa2020-44 advisory.

  - When recursing through graphical layers while scrolling, an iterator may have become invalid, resulting in
    a potential use-after-free. This occurs because the function
    <code>APZCTreeManager::ComputeClippedCompositionBounds</code> did not follow iterator invalidation rules.
    (CVE-2020-15678)

  - By exploiting an Open Redirect vulnerability on a website, an attacker could have spoofed the site
    displayed in the download file dialog to show the original site (the one suffering from the open redirect)
    rather than the site the file was actually downloaded from. (CVE-2020-15677)

  - Thunderbird sometimes ran the onload handler for SVG elements that the DOM sanitizer decided to remove,
    resulting in JavaScript being executed after pasting attacker-controlled data into a contenteditable
    element. (CVE-2020-15676)

  - Mozilla developer Jason Kratzer reported memory safety bugs present in Thunderbird 78.2. Some of these
    bugs showed evidence of memory corruption and we presume that with enough effort some of these could have
    been exploited to run arbitrary code. (CVE-2020-15673)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://www.mozilla.org/en-US/security/advisories/mfsa2020-44/");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Mozilla Thunderbird version 78.3 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-15678");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/09/22");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/09/22");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/11/18");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:mozilla:thunderbird");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"MacOS X Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2025 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("macosx_thunderbird_installed.nasl");
  script_require_keys("installed_sw/Mozilla Thunderbird");

  exit(0);
}

include('vdf.inc');

# @tvdl-content-verify-only
var vuln_data = {
  "metadata": {
    "spec_version": "1.0"
  },
  "requires": [
    {
      "scope": "target",
      "match": {
        "os": "macos"
      }
    }
  ],
  "checks": [
    {
      "product": {
        "name": "Mozilla Thunderbird",
        "type": "app"
      },
      "check_algorithm": "default",
      "constraints": [
        {
          "fixed_version": "78.3"
        }
      ]
    }
  ]
};

var vdf_result = vdf::check_and_report(vuln_data:vuln_data, severity:SECURITY_WARNING);
vdf::handle_check_and_report_errors(vdf_result:vdf_result);

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18 Nov 2025 00:00Current
8.1High risk
Vulners AI Score8.1
CVSS 26.8
CVSS 3.18.8
EPSS0.00995
1