Palo Alto Networks PAN-OS 7.1.x < 8.1.15 / 9.0.x < 9.0.9 / 9.1.x < 9.1.3 GlobalProtect Command Injection Vulnerability

#
# (C) Tenable Network Security, Inc.
#

include('compat.inc');

if (description)
{
  script_id(138331);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/10/13");

  script_cve_id("CVE-2020-2034");
  script_xref(name:"IAVA", value:"2020-A-0282-S");

  script_name(english:"Palo Alto Networks PAN-OS 7.1.x < 8.1.15 / 9.0.x < 9.0.9 / 9.1.x < 9.1.3 GlobalProtect Command Injection Vulnerability");

  script_set_attribute(attribute:"synopsis", value:
"The remote PAN-OS host is affected by a command injection vulnerability");
  script_set_attribute(attribute:"description", value:
"The version of Palo Alto Networks PAN-OS running on the remote host is 7.1.x prior to 8.1.15 or 9.0.x prior to 9.0.9 or
9.1.x prior to 9.1.3. It is, therefore, affected by a command injection vulnerability exists in the GlobalProtect portal.
An unauthenticated, remote attacker can exploit this, to execute arbitrary commands with root privileges.

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-2020-2034");
  script_set_attribute(attribute:"solution", value:
"Upgrade to PAN-OS 8.1.15 / 9.0.9 / 9.1.3 or later");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:C/I:C/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:H/PR:N/UI:N/S:U/C:H/I:H/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-2020-2034");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_cwe_id(78);

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/07/08");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/07/08");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/07/09");

  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:"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) 2020 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');
include('http_func.inc');

vcf::palo_alto::initialize();

app_name = 'Palo Alto Networks PAN-OS';

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

# We cannot detect if GlobalProtect is configured on the device
if (report_paranoia < 2) audit(AUDIT_PARANOID);

constraints = [
  { 'min_version' : '7.1.0', 'fixed_version' : '8.1.15' },
  { 'min_version' : '9.0.0', 'fixed_version' : '9.0.9' },
  { 'min_version' : '9.1.0', 'fixed_version' : '9.1.3' }
];

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