OpenSSH < 3.0.2 'UseLogin Environment Variables' RCE Vulnerability

# SPDX-FileCopyrightText: 2005 by EMAZE Networks S.p.A.
# 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("1.3.6.1.4.1.25623.1.0.10823");
  script_version("2023-08-03T05:05:16+0000");
  script_cve_id("CVE-2001-0872");
  script_tag(name:"last_modification", value:"2023-08-03 05:05:16 +0000 (Thu, 03 Aug 2023)");
  script_tag(name:"creation_date", value:"2005-11-03 14:08:04 +0100 (Thu, 03 Nov 2005)");
  script_tag(name:"cvss_base", value:"7.2");
  script_tag(name:"cvss_base_vector", value:"AV:L/AC:L/Au:N/C:C/I:C/A:C");
  script_name("OpenSSH < 3.0.2 'UseLogin Environment Variables' RCE Vulnerability");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2005 by EMAZE Networks S.p.A.");
  script_family("Gain a shell remotely");
  script_dependencies("gb_openssh_consolidation.nasl");
  script_mandatory_keys("openssh/detected");

  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/3614");

  script_tag(name:"summary", value:"OpenSSH is prone to a remote code execution (RCE)
  vulnerability.");

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

  script_tag(name:"insight", value:"Versions prior than 3.0.2 are vulnerable to an environment
  variables export that can allow a local user to execute command with root privileges.");

  script_tag(name:"affected", value:"This problem affect only versions prior than 3.0.2, and when
  the UseLogin feature is enabled (usually disabled by default).");

  script_tag(name:"solution", value:"Update to version 3.0.2 or later.");

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

  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:"3.0.2" ) ) {
  report = report_fixed_ver( installed_version:vers, fixed_version:"3.0.2", install_path:path );
  security_message( port:port, data:report );
  exit( 0 );
}

exit( 99 );