Atlassian Confluence 7.1.x < 9.2.26 / 9.3.x < 10.2.17 / 11.0.0 (CONFSERVER-104421)

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

include('compat.inc');

if (description)
{
  script_id(368971);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/10/22");

  script_cve_id("CVE-2026-54512");

  script_name(english:"Atlassian Confluence 7.1.x < 9.2.26 / 9.3.x < 10.2.17 / 11.0.0 (CONFSERVER-104421)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Atlassian Confluence host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"The version of Atlassian Confluence Server running on the remote host is affected by a vulnerability as referenced in
the CONFSERVER-104421 advisory.

  - jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data
    Processor. From 2.10.0 until 2.18.8, 2.21.4, and 3.1.4, jackson-databind's PolymorphicTypeValidator (PTV)
    is the primary safety mechanism guarding polymorphic deserialization. When polymorphic typing is enabled
    and a type identifier contains generic parameters (i.e. the type ID string contains <),
    DatabindContext._resolveAndValidateGeneric() validates only the raw container class name (the substring
    before <) against the configured PTV. If the container type is approved, the method parses the full
    canonical type string via TypeFactory.constructFromCanonical() and returns the fully parameterized type
    without ever validating the nested type arguments against the PTV. The nested type arguments are then
    resolved, instantiated, and populated as beans during deserialization. An attacker who controls the type
    ID can therefore place a denied class as a generic type parameter of an allowed container  for example
    java.util.ArrayList<com.evil.Gadget> when only java.util.ArrayList is allow-listed. The container passes
    the PTV check; com.evil.Gadget is loaded via Class.forName(name, true, loader), instantiated, and its
    properties are set from attacker-controlled JSON. This completely bypasses an explicitly configured PTV
    allow-list. This vulnerability is fixed in 2.18.8, 2.21.4, and 3.1.4. (CVE-2026-54512)

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/CONFSERVER-104421");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Atlassian Confluence version 9.2.26, 10.2.17, 11.0.0 or later.");
  script_set_attribute(attribute:"agent", value:"all");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:H/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-54512");

  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:"2026/06/23");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/09/02");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/10/21");

  script_set_attribute(attribute:"plugin_type", value:"combined");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:atlassian:confluence");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_set_attribute(attribute:"thorough_tests", value:"true");
  script_set_attribute(attribute:"enable_cgi_scanning", value:"true");
  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("confluence_detect.nasl", "confluence_nix_installed.nbin", "confluence_win_installed.nbin");
  script_require_keys("installed_sw/Atlassian Confluence");

  exit(0);
}

include('vdf.inc');

# @tvdl-content-verify-only
var vuln_data = {
  "metadata": {
    "spec_version": "1.0"
  },
  "checks": [
    {
      "product": {
        "name": "Atlassian Confluence",
        "type": "app"
      },
      "check_algorithm": "default",
      "constraints": [
        {
          "min_version": "7.1.0",
          "fixed_version": "9.2.26",
          "fixed_display": "9.2.26 / 10.2.17 / 11.0.0"
        },
        {
          "min_version": "9.3.1",
          "fixed_version": "10.2.17",
          "fixed_display": "10.2.17 / 11.0.0"
        }
      ]
    }
  ]
};

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