Atlassian Confluence < 9.2.24 / 9.3.x < 10.2.17 / 11.0.0 (CONFSERVER-104483)

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

include('compat.inc');

if (description)
{
  script_id(368965);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/10/21");

  script_cve_id("CVE-2026-73508");

  script_name(english:"Atlassian Confluence < 9.2.24 / 9.3.x < 10.2.17 / 11.0.0 (CONFSERVER-104483)");

  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-104483 advisory.

  - Netty is an asynchronous, event-driven network application framework. Prior to 4.1.136.Final and
    4.2.16.Final, io.netty.handler.codec.dns.AbstractDnsRecord,
    io.netty.handler.codec.dns.DefaultDnsRecordDecoder.decodeRecord(), and
    io.netty.handler.codec.dns.DnsCodecUtil.decompressDomainName() failed to release retained or newly
    allocated ByteBuf objects when IDN.toASCII() or encodeDomainName() rejected a malformed domain name,
    allowing unauthenticated remote DNS packets to leak direct memory incrementally until denial of service.
    This issue is fixed in versions 4.1.136.Final and 4.2.16.Final. (CVE-2026-73508)

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-104483");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Atlassian Confluence version 9.2.24, 10.2.17, 11.0.0 or later.");
  script_set_attribute(attribute:"agent", value:"all");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C");
  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:N/I:N/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-73508");

  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:"2026/07/24");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/09/25");
  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": [
        {
          "fixed_version": "9.2.24",
          "fixed_display": "9.2.24 / 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);