IBM WebSphere Application Server Liberty 17.0.0.3 < 26.0.0.9 Privilege Escalation (7283489)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

include('compat.inc');

if (description)
{
  script_id(335002);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/08/13");

  script_cve_id("CVE-2026-18499");

  script_name(english:"IBM WebSphere Application Server Liberty 17.0.0.3 < 26.0.0.9 Privilege Escalation (7283489)");

  script_set_attribute(attribute:"synopsis", value:
"The remote web application server is affected by a privilege escalation vulnerability.");
  script_set_attribute(attribute:"description", value:
"The version of IBM WebSphere Application Server Liberty running on the remote host is affected by a privilege escalation
vulnerability as referenced in the 7283489 advisory.

  - IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.8 is vulnerable to a privilege
    escalation when using Liberty collectives. (CVE-2026-18499)

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/7283489");
  script_set_attribute(attribute:"solution", value:
"Update to IBM WebSphere Application Server Liberty version 26.0.0.9 or later.");
  script_set_attribute(attribute:"agent", value:"all");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:C/I:C/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:L/UI:N/S:U/C:H/I:H/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-2026-18499");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/08/12");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/08/12");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/08/13");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:ibm:websphere_application_server");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("websphere_liberty_detect.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);

if (app_info['Product'] != app + ' Liberty')
  audit(AUDIT_HOST_NOT, app + ' Liberty');

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


var constraints = [
  { 'min_version' : '17.0.0.3', 'fixed_version' : '26.0.0.9' }
];

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