Palo Alto Networks PAN-OS 10.2.x < 10.2.14 / 11.1.x < 11.1.8 / 11.2.x < 11.2.8 Vulnerability

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

include('compat.inc');

if (description)
{
  script_id(344630);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/09/10");

  script_cve_id("CVE-2023-48795");

  script_name(english:"Palo Alto Networks PAN-OS 10.2.x < 10.2.14 / 11.1.x < 11.1.8 / 11.2.x < 11.2.8 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 10.2.x prior to 10.2.14, 11.1.x prior to 11.1.8,
or 11.2.x prior to 11.2.8. It is, therefore, affected by a vulnerability.

    The Terrapin attack allows an attacker with the ability to intercept SSH traffic on affected Palo Alto
    Networks products (through machine-in-the-middle or MitM attacks) to downgrade connection security and
    force the usage of less secure client authentication algorithms when an administrator or user connects to
    the product.

    This issue does not impact the SSH server component of PAN-OS software configured to exclusively use
    strong cipher algorithms or configured to operate in FIPS-CC mode, which removes support for the impacted
    algorithms.

    When using the PAN-OS SSH client to connect to an SSH server that supports the CHACHA20-POLY1305 algorithm
    or any Encrypt-then-MAC algorithms, the traffic is susceptible to this attack.

    This issue affects Prisma SD-WAN ION devices.

    Additional information and technical details about the attack can be found at https://terrapin-attack.com.

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-2023-48795");
  script_set_attribute(attribute:"solution", value:
"Upgrade to PAN-OS 10.2.14 / 11.1.8 / 11.2.8 or later");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:H/Au:N/C:N/I:C/A:N");
  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:N/I:H/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss4_vector", value:"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N");
  script_set_attribute(attribute:"cvss4_supplemental", value:"CVSS:4.0/AU:N/R:A/V:D/RE:L/U:Amber");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:P");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2023-48795");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_cwe_id(354);

  script_set_attribute(attribute:"vuln_publication_date", value:"2023/06/13");
  script_set_attribute(attribute:"patch_publication_date", value:"2024/01/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/09/10");

  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' : '10.2.0', 'fixed_version' : '10.2.14' },
  { 'min_version' : '11.1.0', 'fixed_version' : '11.1.8' },
  { 'min_version' : '11.2.0', 'fixed_version' : '11.2.8' }
];

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