Grammarly Extension For Google Chrome Information Disclosure Vulnerability - Windows

# SPDX-FileCopyrightText: 2018 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

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.812696");
  script_version("2023-07-20T05:05:17+0000");
  script_cve_id("CVE-2018-6654");
  script_tag(name:"cvss_base", value:"6.8");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:P/I:P/A:P");
  script_tag(name:"last_modification", value:"2023-07-20 05:05:17 +0000 (Thu, 20 Jul 2023)");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2019-10-03 00:03:00 +0000 (Thu, 03 Oct 2019)");
  script_tag(name:"creation_date", value:"2018-02-08 14:22:37 +0530 (Thu, 08 Feb 2018)");
  script_name("Grammarly Extension For Google Chrome Information Disclosure Vulnerability - Windows");

  script_tag(name:"summary", value:"Grammarly Spell Checker for Google Chrome is prone to an information disclosure 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 as the extension exposes its
  auth tokens to all websites");

  script_tag(name:"impact", value:"Successful exploitation of this vulnerability
  will allow any user to login 'grammarly.com' as victim and access all his documents,
  history, logs, and all other data.");

  script_tag(name:"affected", value:"Grammarly extension before 14.826.1446 for
  Chrome on Windows");

  script_tag(name:"solution", value:"Upgrade to Grammarly extension 14.826.1446
  or later. Please see the references for more info.");

  script_tag(name:"solution_type", value:"VendorFix");

  script_tag(name:"qod", value:"75");

  script_xref(name:"URL", value:"https://bugs.chromium.org/p/project-zero/issues/detail?id=1527&desc=2");
  script_xref(name:"URL", value:"https://thehackernews.com/2018/02/grammar-checking-software.html");
  script_xref(name:"URL", value:"https://www.grammarly.com/");

  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2018 Greenbone AG");
  script_family("General");
  script_dependencies("gb_google_chrome_detect_portable_win.nasl", "smb_reg_service_pack.nasl", "gb_wmi_access.nasl", "lsc_options.nasl");
  script_mandatory_keys("GoogleChrome/Win/Ver", "WMI/access_successful", "SMB/WindowsVersion");
  script_exclude_keys("win/lsc/disable_wmi_search");

  exit(0);
}

include("smb_nt.inc");
include("version_func.inc");
include("misc_func.inc");
include("wmi_file.inc");
include("list_array_func.inc");

if( get_kb_item( "win/lsc/disable_wmi_search" ) )
  exit( 0 );

infos = kb_smb_wmi_connectinfo();
if( ! infos )
  exit( 0 );

handle = wmi_connect( host:infos["host"], username:infos["username_wmi_smb"], password:infos["password"] );
if( ! handle )
  exit( 0 );

fileList = wmi_file_file_search( handle:handle, dirPathLike:"%google%chrome%extensions%", fileName:"Grammarly", fileExtn:"html", includeHeader:FALSE );
wmi_close( wmi_handle:handle );
if( ! fileList || ! is_array( fileList ) )
  exit( 0 );

report = "";  # nb: To make openvas-nasl-lint happy...

foreach filePath( fileList ) {

  info = eregmatch( pattern:"(.*(g|G)oogle.(c|C)hrome.*(e|E)xtensions.*[A-za-z]+\\([0-9.]+).*)(g|G)rammarly.html", string:filePath );
  if( ! info[5] ) continue;

  version = info[5];
  path = info[1];

  if( version_is_less( version:version, test_version:"14.826.1446" ) ) {
    VULN = TRUE;
    report += report_fixed_ver( installed_version:version, install_path:path, fixed_version:"14.826.1446" ) + '\n';
  }
}

if( VULN ) {
  security_message( port:0, data:report );
  exit( 0 );
}

exit( 99 );