D-Link DIR-878 Rev. A <= v1.30B08 RCE Vulnerability

# SPDX-FileCopyrightText: 2023 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:/o:dlink:dir-878_firmware";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.170329");
  script_version("2023-11-21T05:05:52+0000");
  script_tag(name:"last_modification", value:"2023-11-21 05:05:52 +0000 (Tue, 21 Nov 2023)");
  script_tag(name:"creation_date", value:"2023-03-01 15:04:08 +0000 (Wed, 01 Mar 2023)");
  script_tag(name:"cvss_base", value:"8.3");
  script_tag(name:"cvss_base_vector", value:"AV:A/AC:L/Au:N/C:C/I:C/A:C");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2023-02-02 15:18:00 +0000 (Thu, 02 Feb 2023)");

  script_tag(name:"qod_type", value:"remote_banner_unreliable"); # nb: v.130B08 Beta Hotfix not detected

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

  script_cve_id("CVE-2022-41140");

  script_name("D-Link DIR-878 Rev. A <= v1.30B08 RCE Vulnerability");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2023 Greenbone AG");
  script_family("Web application abuses");
  script_dependencies("gb_dlink_dir_consolidation.nasl");
  script_mandatory_keys("d-link/dir/detected", "d-link/dir/hw_version");

  script_tag(name:"summary", value:"D-Link DIR-878 Rev. A devices are prone to a remote command
  execution (RCE) vulnerability.");

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

  script_tag(name:"insight", value:"The specific flaw exists within the lighttpd service, which
  listens on TCP port 80 by default. The issue results from the lack of proper validation of the
  length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker
  can leverage this vulnerability to execute code in the context of root.");

  script_tag(name:"affected", value:"D-Link DIR-878 Rev. A devices through firmware version
  1.30B07.");

  script_tag(name:"solution", value:"Update to 1.30B08 Beta Hotfix or later.");

  script_xref(name:"URL", value:"https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10291");
  script_xref(name:"URL", value:"https://www.zerodayinitiative.com/advisories/ZDI-22-1290/");

  exit(0);
}

include("host_details.inc");
include("revisions-lib.inc");
include("version_func.inc");

if ( ! version = get_app_version( cpe:CPE, nofork:TRUE ) )
  exit( 0 );

hw_version = get_kb_item( "d-link/dir/hw_version" );
if ( ! hw_version )
  exit( 0 );

# nb: some of the versions might contain _Beta or other suffixes, using revcomp to be on the safe side
if ( ( hw_version =~ "A" ) && ( revcomp( a:version, b:"1.30B08" ) <= 0 ) ) {
  report = report_fixed_ver( installed_version:version, fixed_version:"1.30B08 Beta Hotfix", extra:"Hardware revision: " + hw_version );
  security_message( port:0, data:report );
  exit( 0 );
}

exit( 99 );