OpenBSD OpenSSH < 9.1 Multiple Vulnerabilities

# 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:openbsd:openssh";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.127244");
  script_version("2025-01-21T05:37:33+0000");
  script_tag(name:"last_modification", value:"2025-01-21 05:37:33 +0000 (Tue, 21 Jan 2025)");
  script_tag(name:"creation_date", value:"2022-11-07 08:17:01 +0000 (Mon, 07 Nov 2022)");
  script_tag(name:"cvss_base", value:"4.0");
  script_tag(name:"cvss_base_vector", value:"AV:A/AC:H/Au:S/C:P/I:P/A:P");

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

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

  script_name("OpenBSD OpenSSH < 9.1 Multiple Vulnerabilities");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2022 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 multiple vulnerabilities.");

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

  script_tag(name:"insight", value:"The following vulnerabilities exist:

  - A one-byte overflow in SSH- banner processing in ssh-keyscan.

  - A double free() in error path of file hashing step in
   signing/verify code in ssh-keygen.

  - A double-free in error path in ssh-keysign.");

  script_tag(name:"affected", value:"OpenBSD OpenSSH prior to version 9.1.");

  script_tag(name:"solution", value:"Update to version 9.1 or later.");

  script_xref(name:"URL", value:"https://www.openssh.com/releasenotes.html#9.1");

  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(version: version, test_version: "9.1")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "9.1", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

exit(99);