OpenBSD OpenSSH <= 8.6 Command Injection Vulnerability

# SPDX-FileCopyrightText: 2020 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-or-later

CPE = "cpe:/a:openbsd:openssh";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.113736");
  script_version("2023-03-24T10:19:42+0000");
  script_tag(name:"last_modification", value:"2023-03-24 10:19:42 +0000 (Fri, 24 Mar 2023)");
  script_tag(name:"creation_date", value:"2020-08-03 11:10:35 +0000 (Mon, 03 Aug 2020)");
  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:"severity_vector", value:"CVSS:3.1/AV:L/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:"2021-06-22 14:47:00 +0000 (Tue, 22 Jun 2021)");

  script_tag(name:"qod_type", value:"remote_banner_unreliable");

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

  # Note: The CVE has been disputed but it was only stated that it won't be fixed because it would
  # break some other workflows which doesn't make a vulnerability invalid.
  script_cve_id("CVE-2020-15778");

  script_name("OpenBSD OpenSSH <= 8.6 Command Injection Vulnerability");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2020 Greenbone AG");
  script_family("General");
  script_dependencies("gb_openssh_consolidation.nasl");
  script_mandatory_keys("openssh/detected");

  script_tag(name:"summary", value:"OpenBSD OpenSSH is prone to a command injection
  vulnerability.");

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

  script_tag(name:"insight", value:"scp of OpenSSH allows command injection in spc.c via backtick
  characters in the destination argument.");

  script_tag(name:"impact", value:"Successful exploitation would allow an attacker to execute
  arbitrary code on the target machine.");

  script_tag(name:"affected", value:"OpenBSD OpenSSH through version 8.6 (initially reported for
  8.3p1).");

  script_tag(name:"solution", value:"No known solution was made available for at least one year
  since the disclosure of this vulnerability. Likely none will be provided anymore. General solution
  options are to upgrade to a newer release, disable respective features, remove the product or
  replace the product by another one.");

  script_xref(name:"URL", value:"https://github.com/cpandya2909/CVE-2020-15778/");

  exit(0);
}

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

if (isnull(port = get_app_port(cpe: CPE)))
  exit(0);

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

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

if (version_is_less_equal(version: version, test_version: "8.6")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "None", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

exit(0);