OpenSSH 'child_set_env()' Function Security Bypass Vulnerability

# SPDX-FileCopyrightText: 2014 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("1.3.6.1.4.1.25623.1.0.105003");
  script_cve_id("CVE-2014-2532");
  script_version("2025-01-17T15:39:18+0000");
  script_name("OpenSSH 'child_set_env()' Function Security Bypass Vulnerability");
  script_tag(name:"cvss_base", value:"5.8");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:P/I:P/A:N");
  script_tag(name:"last_modification", value:"2025-01-17 15:39:18 +0000 (Fri, 17 Jan 2025)");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2018-07-19 01:29:00 +0000 (Thu, 19 Jul 2018)");
  script_tag(name:"creation_date", value:"2014-04-09 12:39:48 +0200 (Wed, 09 Apr 2014)");
  script_category(ACT_GATHER_INFO);
  script_family("General");
  script_copyright("Copyright (C) 2014 Greenbone AG");
  script_dependencies("gb_openssh_consolidation.nasl");
  script_mandatory_keys("openssh/detected");

  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/66355");

  script_tag(name:"impact", value:"The security bypass allows remote attackers to bypass intended environment
  restrictions by using a substring located before a wildcard character.");

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

  script_tag(name:"insight", value:"sshd in OpenSSH before 6.6 does not properly support wildcards on AcceptEnv
  lines in sshd_config.");

  script_tag(name:"solution", value:"Updates are available. Please see the references for more information.");

  script_tag(name:"summary", value:"OpenSSH is prone to a security bypass vulnerability.");

  script_tag(name:"affected", value:"Versions prior to OpenSSH 6.6 are vulnerable.");

  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:"6.6" ) ) {
  report = report_fixed_ver( installed_version:vers, fixed_version:"6.6", install_path:path );
  security_message( port:port, data:report );
  exit( 0 );
}

exit( 99 );