Opencast Authentication Bypass Vulnerability

# SPDX-FileCopyrightText: 2017 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("1.3.6.1.4.1.25623.1.0.113062");
  script_version("2024-03-01T14:37:10+0000");
  script_tag(name:"last_modification", value:"2024-03-01 14:37:10 +0000 (Fri, 01 Mar 2024)");
  script_tag(name:"creation_date", value:"2017-12-06 14:58:59 +0100 (Wed, 06 Dec 2017)");
  script_tag(name:"cvss_base", value:"4.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:S/C:P/I:N/A:N");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2019-10-03 00:03:00 +0000 (Thu, 03 Oct 2019)");

  # nb: There are no backports of the affected versions
  script_tag(name:"qod_type", value:"remote_banner");

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

  script_cve_id("CVE-2017-1000221");

  script_name("Opencast Authentication Bypass Vulnerability");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2017 Greenbone AG");
  script_family("Web application abuses");
  script_dependencies("gb_opencast_detect.nasl");
  script_mandatory_keys("opencast/detected");

  script_tag(name:"summary", value:"Opencast through version 2.2.3 is prone to an authentication bypass vulnerability.");
  script_tag(name:"vuldetect", value:"The script checks if a vulnerable system is present on the target host.");
  script_tag(name:"insight", value:"If user names overlap, the Opencast search service used for publication to the media modules and players will handle the access control incorrectly so that users only need to match part of the user name used for the access restriction.");
  script_tag(name:"impact", value:"Successful exploitation would allow an authenticatedattacker to access files that would normally require higher privileges.");
  script_tag(name:"affected", value:"Opencast through version 2.2.3");
  script_tag(name:"solution", value:"Update Opencast to version 2.2.4 or 2.3.0");

  script_xref(name:"URL", value:"https://opencast.jira.com/browse/MH-11862");

  exit(0);
}

CPE = "cpe:/a:opencast:opencast";

include( "host_details.inc" );
include( "version_func.inc" );

if( ! port = get_app_port( cpe: CPE ) )
  exit( 0 );

if( ! version = get_app_version( cpe: CPE, port: port ) )
  exit( 0 );

if( version_is_less_equal( version: version, test_version: "2.2.3" ) ) {
  report = report_fixed_ver( installed_version: version, fixed_version: "2.2.4" );
  security_message( data: report, port: port );
  exit( 0 );
}

exit( 99 );