IBM WebSphere Application Server 7.0.0.x <= 7.0.0.45 / 8.0.0.x <= 8.0.0.15 / 8.5.x < 8.5.5.17 / 9.0.x < 9.0.5.3 Command Execution (CVE-2020-4163)

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

include('compat.inc');

if (description)
{
  script_id(133696);
  script_version("1.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/11/30");

  script_cve_id("CVE-2020-4163");

  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 < 8.5.5.17 / 9.0.x < 9.0.5.3 Command Execution (CVE-2020-4163)");

  script_set_attribute(attribute:"synopsis", value:
"The remote web application server is affected by a command execution 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 8.5.5.17, or 9.0.x prior to 9.0.5.3. It is, therefore, affected by a command execution
vulnerability. An authenticated, remote attacker can exploit this by creating a maliciously crafted file name, which
would be misinterpreted as JSP content and executed.");
  script_set_attribute(attribute:"see_also", value:"https://exchange.xforce.ibmcloud.com/vulnerabilities/174397");
  # https://www.ibm.com/support/pages/security-bulletin-websphere-application-server-vulnerable-command-execution-vulnerability-cve-2020-4163
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?3d0d2886");
  script_set_attribute(attribute:"solution", value:
"Upgrade to IBM WebSphere Application Server 8.5.5.17, 9.0.5.3, or later. Alternatively, upgrade to the minimal fix pack
levels required by the interim fix and then apply Interim Fix PH20785.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/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:H/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-2020-4163");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/02/03");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/02/03");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/02/14");

  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_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 PH20785';

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 ('PH20785' >< 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':'8.5.5.16', 'fixed_version':'8.5.5.17 or ' + fix},
  {'min_version':'9.0.0.0', 'max_version':'9.0.5.2', 'fixed_version':'9.0.5.3 or ' + fix}
];

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