IBM WebSphere Application Server 8.0.0.0 <= 8.0.0.15 / 8.5.0.0 <= 8.5.5.19 / 9.0.0.0 <= 9.0.5.7 XXE (CVE-2021-20453)

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

include('compat.inc');

if (description)
{
  script_id(148850);
  script_version("1.6");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/08/01");

  script_cve_id("CVE-2021-20453");
  script_xref(name:"IAVA", value:"2021-A-0189-S");

  script_name(english:"IBM WebSphere Application Server 8.0.0.0 <= 8.0.0.15 / 8.5.0.0 <= 8.5.5.19 / 9.0.0.0 <= 9.0.5.7 XXE (CVE-2021-20453)");

  script_set_attribute(attribute:"synopsis", value:
"The remote web application server is affected by an XML External Entity (XXE) vulnerability");
  script_set_attribute(attribute:"description", value:
"The IBM WebSphere Application Server running on the remote host is version 8.0.x through 8.0.0.15, 8.5.x through
8.5.5.19 or 9.0.x through 9.0.5.7. It is, therefore, vulnerable to a XML External Entity Injection (XXE) attack when
processing XML data. A remote attacker could exploit this vulnerability to expose sensitive information or consume
memory resources.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://www.ibm.com/support/pages/node/6445171");
  script_set_attribute(attribute:"solution", value:
"Upgrade to IBM WebSphere Application Server 8.5.5.20, 9.0.5.8, or later. Alternatively, upgrade to the minimal fix pack
levels required by the interim fix and then apply Interim Fix PH34067.");
  script_set_attribute(attribute:"agent", value:"all");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:N/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:N/UI:N/S:U/C:H/I:N/A:L");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-20453");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2021/04/19");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/04/19");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/04/20");

  script_set_attribute(attribute:"plugin_type", value:"combined");
  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) 2021-2024 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", "ibm_websphere_application_server_win_installed.nbin");
  script_require_keys("installed_sw/IBM WebSphere Application Server");

  exit(0);
}

include('vcf.inc');

var app = 'IBM WebSphere Application Server';
var app_info = vcf::combined_get_app_info(app:app);
vcf::check_granularity(app_info:app_info, sig_segments:4);

var require_paranoia = FALSE;
# If the detection is only remote, Source will be set, and we should require paranoia for versions with a fix
if (!empty_or_null(app_info['Source']) && app_info['Source'] != 'unknown')
    require_paranoia = TRUE;

if ('PH34067' >< app_info['Fixes'])
  audit(AUDIT_INST_VER_NOT_VULN, app);

var fix = 'Interim Fix PH34067';
var constraints = [
  {'min_version':'8.0.0.0', 'max_version':'8.0.0.15', 'fixed_display':fix},
  {'min_version':'8.5.0.0', 'max_version':'8.5.5.19', 'fixed_display':'8.5.5.20 or ' + fix},
  {'min_version':'9.0.0.0', 'max_version':'9.0.5.7', 'fixed_display':'9.0.5.8 or ' + fix}
];

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