Palo Alto Networks PAN-OS 10.2.x / 11.1.x / 11.2.x / 12.1.x Vulnerability

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

include('compat.inc');

if (description)
{
  script_id(312282);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/05/15");

  script_cve_id("CVE-2026-0300");
  script_xref(name:"CISA-KNOWN-EXPLOITED", value:"2026/05/09");
  script_xref(name:"IAVA", value:"2026-A-0453");

  script_name(english:"Palo Alto Networks PAN-OS 10.2.x / 11.1.x / 11.2.x / 12.1.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 10.2.x, 11.1.x, 11.2.x,
or 12.1.x. It is, therefore, affected by a vulnerability.

    A buffer overflow vulnerability in the User-ID Authentication Portal (aka Captive Portal) service of Palo
    Alto Networks PAN-OS software allows an unauthenticated attacker to execute arbitrary code with root
    privileges on the PA-Series and VM-Series firewalls by sending specially crafted packets.

    The risk of this issue is greatly reduced if you secure access to the User-ID Authentication Portal per
    the best practice guidelines
    (https://knowledgebase.paloaltonetworks.com/KCSArticleDetail?id=kA14u000000CqbiCAC) by restricting access
    to only trusted internal IP addresses.

    Prisma Access, Cloud NGFW and Panorama appliances are not impacted by this vulnerability.

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-2026-0300");
  script_set_attribute(attribute:"solution", value:
"Upgrade to a fixed version");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
  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:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:N");
  script_set_attribute(attribute:"cvss4_supplemental", value:"CVSS:4.0/AU:Y/R:U/V:C/RE:M/U:Red");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:A");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-0300");

  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:"2026/05/05");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/05/05");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/05/05");

  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_set_attribute(attribute:"stig_severity", value:"I");
  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' : '10.2.7', 'fixed_version' : '10.2.7-h34' },
  { 'min_version' : '10.2.10', 'fixed_version' : '10.2.10-h36' },
  { 'min_version' : '10.2.13', 'fixed_version' : '10.2.13-h21' },
  { 'min_version' : '10.2.16', 'fixed_version' : '10.2.16-h7' },
  { 'min_version' : '10.2.18', 'fixed_version' : '10.2.18-h6' },
  { 'min_version' : '11.1.4', 'fixed_version' : '11.1.4-h33' },
  { 'min_version' : '11.1.6', 'fixed_version' : '11.1.6-h32' },
  { 'min_version' : '11.1.7', 'fixed_version' : '11.1.7-h6' },
  { 'min_version' : '11.1.10', 'fixed_version' : '11.1.10-h25' },
  { 'min_version' : '11.1.13', 'fixed_version' : '11.1.13-h5', 'fixed_display' : '11.1.13-h5 / 11.1.15' },
  { 'min_version' : '11.2.4', 'fixed_version' : '11.2.4-h17' },
  { 'min_version' : '11.2.7', 'fixed_version' : '11.2.7-h13' },
  { 'min_version' : '11.2.10', 'fixed_version' : '11.2.10-h6', 'fixed_display' : '11.2.10-h6 / 11.2.12' },
  { 'min_version' : '12.1.4', 'fixed_version' : '12.1.4-h5', 'fixed_display' : '12.1.4-h5 / 12.1.7' }
];

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