Atlassian Confluence 9.0.1 / 9.1.x / 9.2.x < 9.2.17 / 9.3.1 / 9.4.x / 9.5.1 / 10.0.2 / 10.1.x / 10.2.x < 10.2.7 (CONFSERVER-104334)

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

include('compat.inc');

if (description)
{
  script_id(331334);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/08/03");

  script_cve_id("CVE-2026-21577");
  script_xref(name:"IAVA", value:"2026-A-0762");

  script_name(english:"Atlassian Confluence 9.0.1 / 9.1.x / 9.2.x < 9.2.17 / 9.3.1 / 9.4.x / 9.5.1 / 10.0.2 / 10.1.x / 10.2.x < 10.2.7 (CONFSERVER-104334)");

  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-104334 advisory.

  - This High severity DoS (Denial of Service) vulnerability was introduced in versions 9.0.1, 9.1.0, 9.2.0,
    9.3.1, 9.4.0, 9.5.1, 10.0.2, 10.1.0 and 10.2.0 of Confluence Data Center. This DoS (Denial of Service) 
    vulnerability, with a CVSS Score of 7.1, allows an authenticated attacker to cause a resource to be 
    unavailable for its intended users by temporarily or indefinitely disrupting services of a host connected 
    to a network. (CVE-2026-21577)

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-104334");
  # https://confluence.atlassian.com/security/security-bulletin-july-21-2026-1821999345.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?3f7c3b7c");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Atlassian Confluence version 9.2.17, 10.2.7 or later.");
  script_set_attribute(attribute:"agent", value:"all");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:N/I:N/A:P");
  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:N/I:N/A:H");
  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:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/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-2026-21577");

  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:"2026/07/08");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/07/08");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/07/31");

  script_set_attribute(attribute:"plugin_type", value:"combined");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:atlassian:confluence");
  script_set_attribute(attribute:"stig_severity", value:"I");
  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
var vuln_data = {
  "metadata": {
    "spec_version": "1.0"
  },
  "checks": [
    {
      "product": {
        "name": "Atlassian Confluence",
        "type": "app"
      },
      "check_algorithm": "default",
      "constraints": [
        { "min_version": "9.0.1",
          "fixed_version": "9.2.17",
          "fixed_display": "9.2.17 / 10.2.7"
        },
        { "min_version": "9.3.1",
          "max_version": "9.4.999",
          "fixed_version": "10.2.7"
        },
        { "min_version": "9.5.1",
          "max_version": "9.5.999",
          "fixed_version": "10.2.7"
        },
        { "min_version": "10.0.2",
          "fixed_version": "10.2.7"
        }
      ]
    }
  ]
};

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