freeSSHd Pre-Authentication Error Remote DoS Vulnerability

# SPDX-FileCopyrightText: 2009 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

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.900960");
  script_version("2025-03-05T05:38:52+0000");
  script_tag(name:"last_modification", value:"2025-03-05 05:38:52 +0000 (Wed, 05 Mar 2025)");
  script_tag(name:"creation_date", value:"2009-10-01 12:15:29 +0200 (Thu, 01 Oct 2009)");
  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-2009-3340");
  script_name("freeSSHd Pre-Authentication Error Remote DoS Vulnerability");
  script_xref(name:"URL", value:"http://intevydis.com/vd-list.shtml");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/36235");
  script_xref(name:"URL", value:"http://www.intevydis.com/blog/?p=57");
  script_xref(name:"URL", value:"http://secunia.com/advisories/36506");
  script_xref(name:"URL", value:"http://securitytracker.com/alerts/2009/Sep/1022811.html");

  script_tag(name:"qod_type", value:"registry");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2009 Greenbone AG");
  script_family("Denial of Service");
  script_dependencies("secpod_freesshd_detect.nasl");
  script_require_ports("Services/ssh", 22);
  script_mandatory_keys("freeSSHd/Ver");

  script_tag(name:"impact", value:"Successful attack could allow attackers to crash application to cause
  denial of service.");

  script_tag(name:"affected", value:"freeSSHd version 1.2.4 and prior.");

  script_tag(name:"insight", value:"The flaw is due to an unspecified pre-authentication error.");

  script_tag(name:"solution", value:"Upgrade to freeSSHd version 1.2.6 or later.");

  script_tag(name:"summary", value:"freeSSHd is prone to a denial of service (DoS)
  vulnerability.");

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

  exit(0);
}

include("version_func.inc");

sshdVer = get_kb_item("freeSSHd/Ver");
if(sshdVer)
{
  if(version_is_less_equal(version:sshdVer, test_version:"1.2.4")){
    report = report_fixed_ver(installed_version:sshdVer, vulnerable_range:"Less than or equal to 1.2.4");
    security_message(port: 0, data: report);
  }
}