IBM WebSphere Application Server 7.0.0.0 <= 7.0.0.45 / 8.0.0.0 <= 8.0.0.15 / 8.5.0.0 <= 8.5.5.17 / 9.0.0.0 <= 9.0.5.3 Privilege Escalation (CVE-2020-4362)

#
# (C) Tenable Network Security, Inc.
#

include('compat.inc');

if (description)
{
  script_id(135702);
  script_version("1.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/11/30");

  script_cve_id("CVE-2020-4362");
  script_xref(name:"IAVA", value:"2020-A-0161-S");

  script_name(english:"IBM WebSphere Application Server 7.0.0.0 <= 7.0.0.45 / 8.0.0.0 <= 8.0.0.15 / 8.5.0.0 <= 8.5.5.17 / 9.0.0.0 <= 9.0.5.3 Privilege Escalation (CVE-2020-4362)");

  script_set_attribute(attribute:"synopsis", value:
"The remote web application server is affected by a Privilege Escalation vulnerability");
  script_set_attribute(attribute:"description", value:
"A privilege escalation vulnerability exists in IBM WebSphere Application Server 7.0.0.0 through 7.0.0.45, 8.0.0.0 through
8.0.0.15, 8.5.0.0 through 8.5.5.17, 9.0.0.0 through 9.0.5.3 when using token-based authentication in an admin request over
the SOAP connector. An authenticated, remote attacker can exploit this to gain higher privileges on the system.");
  script_set_attribute(attribute:"see_also", value:"https://exchange.xforce.ibmcloud.com/vulnerabilities/178929");
  script_set_attribute(attribute:"see_also", value:"https://www.ibm.com/support/pages/node/6174417");
  script_set_attribute(attribute:"solution", value:
"Apply the Fix Pack recommended in the vendor advisory. Alternatively, upgrade to the minimal fix pack levels required
by the interim fix and then apply Interim Fix PH23853.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-4362");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/04/09");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/04/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/04/17");

  script_set_attribute(attribute:"plugin_type", value:"combined");
  script_set_attribute(attribute:"agent", value:"all");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:ibm:websphere_application_server");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Web Servers");

  script_copyright(english:"This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("websphere_detect.nasl", "ibm_enum_products.nbin", "ibm_websphere_application_server_nix_installed.nbin");
  script_require_keys("installed_sw/IBM WebSphere Application Server");

  exit(0);
}

include('vcf.inc');


app = 'IBM WebSphere Application Server';
fix = 'Interim Fix PH23853';

get_install_count(app_name:app, exit_if_zero:TRUE);
app_info = vcf::combined_get_app_info(app:app);
vcf::check_granularity(app_info:app_info, sig_segments:4);

# If the detection is only remote, Source will be set, and we should require paranoia
if (!empty_or_null(app_info['Source']) && app_info['Source'] != 'unknown' && report_paranoia < 2)
  audit(AUDIT_PARANOID);

if ('PH23853' >< app_info['Fixes'])
  audit(AUDIT_INST_VER_NOT_VULN, app);

constraints = [
  {'min_version':'7.0.0.0', 'max_version':'7.0.0.45', 'fixed_version':'7.0.0.45 ' + fix},
  {'min_version':'8.0.0.0', 'max_version':'8.0.0.15', 'fixed_version':'8.0.0.15 ' + fix},
  {'min_version':'8.5.0.0', 'max_version':'8.5.5.17', 'fixed_version':'8.5.5.17 ' + fix + ' or 8.5.5.18'},
  {'min_version':'9.0.0.0', 'max_version':'9.0.5.3', 'fixed_version':'9.0.5.3 ' + fix + ' or 9.0.5.4'}
];

vcf::check_version_and_report(app_info:app_info, constraints:constraints, severity:SECURITY_WARNING);