IBM WebSphere Application Server 7.0.0.x <= 7.0.0.45 / 8.0.0.x <= 8.0.0.15 / 8.5.x < 8.5.5.19 / 9.0.x < 9.0.5.6 Information Disclosure (CVE-2020-4576)

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

include('compat.inc');

if (description)
{
  script_id(141473);
  script_version("1.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/09/24");

  script_cve_id("CVE-2020-4576");
  script_xref(name:"IAVA", value:"2020-A-0431-S");

  script_name(english:"IBM WebSphere Application Server 7.0.0.x <= 7.0.0.45 / 8.0.0.x <= 8.0.0.15 / 8.5.x < 8.5.5.19 / 9.0.x < 9.0.5.6 Information Disclosure (CVE-2020-4576)");

  script_set_attribute(attribute:"synopsis", value:
"The remote web application server is affected by an information disclosure vulnerability");
  script_set_attribute(attribute:"description", value:
"The IBM WebSphere Application Server running on the remote host is version 7.0.0.0 through 7.0.0.45, 8.0.0.0 through
8.0.0.15, 8.5.0.x prior to 8.5.5.19, or 9.0.x prior to 9.0.5.6. It is, therefore, affected by an information disclosure
vulnerability. An unauthenticated, remote attacker can exploit this by sending a specially crafted sequence of 
serialized objects.

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/6339807");
  script_set_attribute(attribute:"solution", value:
"Upgrade to IBM WebSphere Application Server 8.5.5.19, 9.0.5.6, or later. Alternatively, upgrade to the minimal fix pack
levels required by the interim fix and then apply Interim Fix PH27157.");
  script_set_attribute(attribute:"agent", value:"all");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N");
  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:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-4576");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/09/30");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/09/30");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/10/16");

  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) 2020-2021 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 PH27157';

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 ('PH27157' >< 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':fix},
  {'min_version':'8.0.0.0', 'max_version':'8.0.0.15', 'fixed_version':fix},
  {'min_version':'8.5.0.0', 'max_version':'8.5.5.18', 'fixed_version':'8.5.5.19 or ' + fix},
  {'min_version':'9.0.0.0', 'max_version':'9.0.5.5', 'fixed_version':'9.0.5.6 or ' + fix}
];

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