OpenSSH 3.5p1 Configuration Vulnerability

# Copyright (C) 2021 Greenbone Networks GmbH
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#
# SPDX-License-Identifier: GPL-2.0-or-later
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# 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("1.3.6.1.4.1.25623.1.0.150638");
  script_version("2021-05-28T11:51:20+0000");
  script_tag(name:"last_modification", value:"2021-05-28 11:51:20 +0000 (Fri, 28 May 2021)");
  script_tag(name:"creation_date", value:"2021-05-27 14:42:43 +0000 (Thu, 27 May 2021)");
  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_cve_id("CVE-2004-2760");

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

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

  script_name("OpenSSH 3.5p1 Configuration 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:"sshd in OpenSSH 3.5p1, when PermitRootLogin is disabled,
  immediately closes the TCP connection after a root login attempt with the correct password, but
  leaves the connection open after an attempt with an incorrect password, which makes it easier for
  remote attackers to guess the password by observing the connection state.");

  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 3.5p1.");

  script_tag(name:"solution", value:"Update to version 3.6 or later.");

  script_xref(name:"URL", value:"https://cxsecurity.com/issue/WLB-2008080108");

  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_equal( version:vers, test_version:"3.5p1" ) ) {
  report = report_fixed_ver( installed_version:vers, fixed_version:"3.6", install_path:path );
  security_message( port:port, data:report );
  exit( 0 );
}

exit( 99 );