Palo Alto Networks PAN-OS 11.2.x / 12.1.x / 12.2.x Vulnerability

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

include('compat.inc');

if (description)
{
  script_id(372075);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/10/27");

  script_cve_id("CVE-2026-111497");
  script_xref(name:"CISA-KNOWN-EXPLOITED", value:"2026/11/10");

  script_name(english:"Palo Alto Networks PAN-OS 11.2.x / 12.1.x / 12.2.x Vulnerability");

  script_set_attribute(attribute:"synopsis", value:
"The remote PAN-OS host is affected by a vulnerability");
  script_set_attribute(attribute:"description", value:
"The version of Palo Alto Networks PAN-OS running on the remote host is a vulnerable version of 11.2.x, 12.1.x, or
12.2.x. It is, therefore, affected by a vulnerability.

    Palo Alto Networks is aware of the vulnerability in Brotli: CVE-2026-111497.

    A buffer overflow vulnerability in the Brotli decoder (c/dec/decode.c) in Google Brotli versions 1.0.3
    through 1.2.0 on all platforms allows a remote unauthenticated attacker to corrupt adjacent decoder state
    memory, disclose sensitive memory contents, cause a denial of service, or potentially execute arbitrary
    code using a crafted Brotli-compressed stream. Users need to update any Brotli libraries or binaries
    between 1.0.3 through 1.2.0 to the latest available version: 1.0.10 or 1.1.1 or 1.2.1.Brotli is commonly
    used by many HTTP-based applications including Node.js.

    Palo Alto Networks is actively investigating its product portfolio and cloud services to determine
    potential impact from this vulnerability. The sections below will be updated as our analysis progresses
    and additional information or remediation status becomes available.

Tenable has extracted the preceding description block directly from the PAN-OS security advisory.

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://security.paloaltonetworks.com/CVE-2026-xxyyzz");
  script_set_attribute(attribute:"solution", value:
"Upgrade to a fixed version");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:F/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:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:F/RL:O/RC:C");
  script_set_attribute(attribute:"cvss4_vector", value:"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:A");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-111497");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_cwe_id(787);

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/10/21");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/10/26");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/10/26");

  script_set_attribute(attribute:"potential_vulnerability", value:"true");
  script_set_attribute(attribute:"plugin_type", value:"combined");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:paloaltonetworks:pan-os");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Palo Alto Local Security Checks");

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

  script_dependencies("palo_alto_version.nbin");
  script_require_keys("Host/Palo_Alto/Firewall/Version", "Host/Palo_Alto/Firewall/Full_Version", "Host/Palo_Alto/Firewall/Source", "Settings/ParanoidReport");

  exit(0);
}

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

vcf::palo_alto::initialize();

var app_name = 'Palo Alto Networks PAN-OS';

var app_info = vcf::get_app_info(app:app_name, kb_ver:'Host/Palo_Alto/Firewall/Full_Version', kb_source:'Host/Palo_Alto/Firewall/Source');

if (report_paranoia < 2) audit(AUDIT_PARANOID);

var constraints = [
  { 'min_version' : '11.2.4', 'fixed_version' : '11.2.4-h23' },
  { 'min_version' : '11.2.7', 'fixed_version' : '11.2.7-h23' },
  { 'min_version' : '11.2.10', 'fixed_version' : '11.2.10-h17' },
  { 'min_version' : '11.2.13', 'fixed_version' : '11.2.13-h4' },
  { 'min_version' : '11.2.16', 'fixed_version' : '11.2.16-h1' },
  { 'min_version' : '12.1.4', 'fixed_version' : '12.1.4-h13' },
  { 'min_version' : '12.1.7', 'fixed_version' : '12.1.7-h11' },
  { 'min_version' : '12.1.10', 'fixed_version' : '12.1.10-h3' },
  { 'min_version' : '12.2.0', 'fixed_version' : '12.2.4-h1' }
];

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