Logstash 8.12.1 < 8.19.24 / 9.0.x < 9.4.9 / 9.5.x < 9.5.6 Multiple Vulnerabilities (ESA-2026-228)

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

include('compat.inc');

if (description)
{
  script_id(375648);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/11/04");

  script_cve_id("CVE-2026-114820", "CVE-2026-91403");

  script_name(english:"Logstash 8.12.1 < 8.19.24 / 9.0.x < 9.4.9 / 9.5.x < 9.5.6 Multiple Vulnerabilities (ESA-2026-228)");

  script_set_attribute(attribute:"synopsis", value:
"The remote host is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The version of Logstash installed on the remote host is 8.12.1 or later prior to 8.19.24, or 9.0.x prior to 9.4.9, or
9.5.x prior to 9.5.6. It is, therefore, affected by multiple vulnerabilities as referenced in the ESA-2026-228 advisory.

  - Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of
    Oracle Java SE (component: JSSE). Supported versions that are affected are Oracle Java SE: 8u511,
    8u511-perf, 11.0.33, 17.0.21, 21.0.13, 25.0.5, 27.0.1; Oracle GraalVM for JDK: 17.0.21 and 21.0.13; Oracle
    GraalVM Enterprise Edition: 21.3.20. Easily exploitable vulnerability allows unauthenticated attacker with
    network access via multiple protocols to compromise Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM
    Enterprise Edition. Successful attacks of this vulnerability can result in unauthorized creation, deletion
    or modification access to critical data or all Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM
    Enterprise Edition accessible data as well as unauthorized access to critical data or complete access to
    all Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition accessible data. Note: This
    vulnerability can be exploited by using APIs in the specified Component, e.g., through a web service which
    supplies data to the APIs. This vulnerability also applies to Java deployments, typically in clients
    running sandboxed Java Web Start applications or sandboxed Java applets, that load and run untrusted code
    (e.g., code that comes from the internet) and rely on the Java sandbox for security. (CVE-2026-91403)

  - Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of
    Oracle Java SE (component: JSSE). Supported versions that are affected are Oracle Java SE: 8u511-b32,
    8u511-perf-b32, 11.0.33.0.2, 17.0.21.0.2, 21.0.13.0.2, 25.0.5.0.2, 27.0.1.0.2; Oracle GraalVM for JDK:
    17.0.21.0.2 and 21.0.13.0.2; Oracle GraalVM Enterprise Edition: 21.3.20.0.2. Easily exploitable
    vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise
    Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition. Successful attacks of this
    vulnerability can result in unauthorized creation, deletion or modification access to critical data or all
    Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition accessible data as well as
    unauthorized access to critical data or complete access to all Oracle Java SE, Oracle GraalVM for JDK,
    Oracle GraalVM Enterprise Edition accessible data. Note: This vulnerability can be exploited by using APIs
    in the specified Component, e.g., through a web service which supplies data to the APIs. This
    vulnerability also applies to Java deployments, typically in clients running sandboxed Java Web Start
    applications or sandboxed Java applets, that load and run untrusted code (e.g., code that comes from the
    internet) and rely on the Java sandbox for security. (CVE-2026-114820)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://discuss.elastic.co/t/391365");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Logstash version 8.19.24, 9.4.9, or 9.5.6 or later as appropriate for your release branch.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:POC/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:H/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-91403");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/10/20");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/11/03");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/11/03");

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

  script_category(ACT_GATHER_INFO);
  script_family(english:"CGI abuses");

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

  script_dependencies("logstash_api_detect.nbin");
  script_require_keys("installed_sw/Logstash");
  script_require_ports("Services/www", 9600);

  exit(0);
}

include('vcf.inc');
include('http.inc');

var app = 'Logstash';

get_install_count(app_name:app, exit_if_zero:TRUE);

var port = get_http_port(default:9600);

var app_info = vcf::get_app_info(app:app, port:port, webapp:TRUE);

var constraints = [
  { 'min_version' : '8.12.1', 'fixed_version' : '8.19.24' },
  { 'min_version' : '9.0.0', 'fixed_version' : '9.4.9' },
  { 'min_version' : '9.5.0', 'fixed_version' : '9.5.6' }
];

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