IBM WebSphere Application Server 8.0.0.0 <= 8.0.0.15 / 8.5.0.0 <= 8.5.5.19 / 9.0.0.0 <= 9.0.5.6 Directory Traversal (CVE-2021-20354)

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

include('compat.inc');

if (description)
{
  script_id(146859);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/06/03");

  script_cve_id("CVE-2021-20354");
  script_xref(name:"IAVA", value:"2021-A-0104-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 <= 9.0.5.6 Directory Traversal (CVE-2021-20354)");

  script_set_attribute(attribute:"synopsis", value:
"The remote web application server is affected by a directory traversal 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 9.0.5.6. It is, therefore, affected by a directory traversal vulnerability due to 
insufficient user input validation. An unauthenticated, remote attacker can exploit this, by sending a URI
that contains directory traversal characters, to disclose the contents of files located outside of the server's
restricted path.

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/6415959");
  script_set_attribute(attribute:"solution", value:
"Upgrade to IBM WebSphere Application Server 8.5.5.20, 9.0.5.7, or later. Alternatively, upgrade to the minimal fix pack
levels required by the interim fix and then apply Interim Fix PH33648.");
  script_set_attribute(attribute:"agent", value:"all");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/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-2021-20354");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2021/02/17");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/02/17");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/02/25");

  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 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';
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 ('PH33648' >< app_info['Fixes'])
  audit(AUDIT_INST_VER_NOT_VULN, app);

fix = 'Interim Fix PH33648';
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':'9.0.5.6', 'fixed_display':'9.0.5.7 or ' + fix}
];

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