Atlassian Jira Service Management Data Center and Server < 10.3.13 / 10.4.x < 11.1.1 (JSDSERVER-16831)

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

include('compat.inc');

if (description)
{
  script_id(367869);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/10/20");

  script_cve_id("CVE-2026-18036");

  script_name(english:"Atlassian Jira Service Management Data Center and Server < 10.3.13 / 10.4.x < 11.1.1 (JSDSERVER-16831)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Atlassian Jira Service Management Data Center and Server (Jira Service Desk) host is missing a security
update.");
  script_set_attribute(attribute:"description", value:
"The version of Atlassian Jira Service Management Data Center and Server (Jira Service Desk) running on the remote host
is affected by a vulnerability as referenced in the JSDSERVER-16831 advisory.

  - In Bouncy Castle for Java before 1.86, NTRU reduced secret values with the % operator in three helpers
    whose reference implementations are deliberately division-free, so each reduction was carried out by an
    integer division whose latency depends on the secret operand. Polynomial.modQ divided by a variable
    divisor, which a compiler cannot strength-reduce to a multiply the way it can a constant one, so it
    emitted a division on every call including on the decapsulation path where the dividend derives from the
    private key; Polynomial.mod3 and NTRUSampling.mod3 divided the secret key polynomials f and g during key
    generation, the message polynomials r and m during encapsulation, and coefficients recovered during
    decapsulation. An attacker able to measure that timing can recover information about the NTRU private key.
    modQ now masks, which is exact because q is always a power of two, and mod3 uses the reference
    implementation's division-free fold and select; the results are unchanged. (CVE-2026-18036)

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://jira.atlassian.com/browse/JSDSERVER-16831");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Atlassian Jira Service Management Data Center and Server version 10.3.13, 11.1.1 or later.");
  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:"cvss4_vector", value:"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:U");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-18036");

  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:"2026/10/02");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/10/16");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/10/20");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:atlassian:jira_service_desk");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_set_attribute(attribute:"thorough_tests", value:"true");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Misc.");

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

  script_dependencies("jira_service_desk_installed_win.nbin", "jira_service_desk_installed_nix.nbin");
  script_require_keys("installed_sw/JIRA Service Desk Application");

  exit(0);
}

include('vdf.inc');

# @tvdl-content-verify-only
var vuln_data = {
  "metadata": {
    "spec_version": "1.0"
  },
  "checks": [
    {
      "product": {
        "name": "JIRA Service Desk Application",
        "type": "app"
      },
      "check_algorithm": "default",
      "constraints": [
        {
          "fixed_version": "10.3.13",
          "fixed_display": "10.3.13 / 11.1.1"
        },
        {
          "min_version": "10.4.0",
          "fixed_version": "11.1.1"
        }
      ]
    }
  ]
};

var vdf_result = vdf::check_and_report(vuln_data:vuln_data, severity:SECURITY_WARNING);
vdf::handle_check_and_report_errors(vdf_result:vdf_result);