Mozilla Firefox Security Advisories (MFSA2021-27, MFSA2021-27) - Windows

# SPDX-FileCopyrightText: 2022 Greenbone AG
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-only

CPE = "cpe:/a:mozilla:firefox";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.820044");
  script_version("2025-09-16T05:38:45+0000");
  script_cve_id("CVE-2021-29968");
  script_tag(name:"cvss_base", value:"5.8");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:P/I:N/A:P");
  script_tag(name:"last_modification", value:"2025-09-16 05:38:45 +0000 (Tue, 16 Sep 2025)");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2021-06-25 19:53:00 +0000 (Fri, 25 Jun 2021)");
  script_tag(name:"creation_date", value:"2022-03-28 17:20:54 +0530 (Mon, 28 Mar 2022)");
  script_name("Mozilla Firefox Security Advisories (MFSA2021-27, MFSA2021-27) - Windows");

  script_tag(name:"summary", value:"Mozilla Firefox is prone to an out of bounds
  read vulnerability.");

  script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present
  on the target host.");

  script_tag(name:"insight", value:"The flaw exists due to an out of bounds
  read error when drawing text characters onto a Canvas.");

  script_tag(name:"impact", value:"Successful exploitation will allow attackers
  to read sensitive information from other memory locations or cause a crash.");

  script_tag(name:"affected", value:"Mozilla Firefox version before 89.0.1
  on Windows.");

  script_tag(name:"solution", value:"Upgrade to Mozilla Firefox version 89.0.1
  or later, Please see the references for more information.");

  script_tag(name:"solution_type", value:"VendorFix");
  script_tag(name:"qod_type", value:"registry");
  script_xref(name:"URL", value:"https://www.mozilla.org/en-US/security/advisories/mfsa2021-27/");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2022 Greenbone AG");
  script_family("General");
  script_dependencies("gb_firefox_detect_win.nasl");
  script_mandatory_keys("Firefox/Win/Ver");
  exit(0);
}

include("host_details.inc");
include("version_func.inc");

if(!infos = get_app_version_and_location(cpe:CPE, exit_no_version:TRUE))
  exit(0);

vers = infos["version"];
path = infos["location"];

if(version_is_less(version:vers, test_version:"89.0.1")) {
  report = report_fixed_ver(installed_version:vers, fixed_version:"89.0.1", install_path:path);
  security_message(port:0, data:report);
  exit(0);
}

exit(99);