OpenSSH <= 3.7.1p2 Security Vulnerability

# Copyright (C) 2021 Greenbone Networks GmbH
# Some text descriptions might be excerpted from (a) referenced
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#
# SPDX-License-Identifier: GPL-2.0-or-later
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
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# GNU General Public License for more details.
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CPE = "cpe:/a:openbsd:openssh";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.150639");
  script_version("2022-04-12T08:46:17+0000");
  script_tag(name:"last_modification", value:"2022-04-12 08:46:17 +0000 (Tue, 12 Apr 2022)");
  script_tag(name:"creation_date", value:"2021-05-27 14:42:43 +0000 (Thu, 27 May 2021)");
  script_tag(name:"cvss_base", value:"5.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:N/A:P");

  script_cve_id("CVE-2004-2069");

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

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

  script_name("OpenSSH <= 3.7.1p2 Security Vulnerability");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2021 Greenbone Networks GmbH");
  script_family("General");
  script_dependencies("gb_openssh_consolidation.nasl");
  script_mandatory_keys("openssh/detected");

  script_tag(name:"summary", value:"OpenSSH is susceptible to a remote denial-of-service vulnerability.
  This issue is due to a design flaw when servicing timeouts related to the 'LoginGraceTime'
  server-configuration directive.

  Specifically, when 'LoginGraceTime' in conjunction with 'MaxStartups' and 'UsePrivilegeSeparation'
  are configured and enabled in the server, a condition may arise where the server refuses further
  remote connection attempts.");

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

  script_tag(name:"insight", value:"Please see the references for more information on the vulnerabilities.");

  script_tag(name:"affected", value:"OpenSSH version 3.7.1p2 and prior.");

  script_tag(name:"solution", value:"Update to version 3.8 or later.");

  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/14963");

  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 );

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

if( version_is_less( version:vers, test_version:"3.8" ) ) {
  report = report_fixed_ver( installed_version:vers, fixed_version:"3.8", install_path:path );
  security_message( port:port, data:report );
  exit( 0 );
}

exit( 99 );