Palo Alto Networks PAN-OS 7.1.x < 8.1.13 / 9.0.x < 9.0.7 Buffer Overflow

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

include('compat.inc');

if (description)
{
  script_id(137904);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/10/13");

  script_cve_id("CVE-2020-2027");
  script_xref(name:"IAVA", value:"2020-A-0222-S");

  script_name(english:"Palo Alto Networks PAN-OS 7.1.x < 8.1.13 / 9.0.x < 9.0.7 Buffer Overflow");

  script_set_attribute(attribute:"synopsis", value:
"The remote PAN-OS host is affected by a buffer overflow 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 8.1.13 or 9.0.x prior to 9.0.7.
It is, therefore, affected by a buffer overflow vulnerability in the authd component of the PAN-OS management server.
An authenticated, remote attacker can exploit this issue to disrupt system processes and potentially execute arbitrary
code 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-2020-2027");
  script_set_attribute(attribute:"see_also", value:"https://cwe.mitre.org/data/definitions/121.html");
  script_set_attribute(attribute:"solution", value:
"Upgrade to PAN-OS 8.1.13 / 9.0.7 /9.1.0 or later");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/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:L/PR:H/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-2020-2027");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_cwe_id(121);

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/06/10");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/06/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/07/01");

  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");

  exit(0);
}

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

constraints = [
  { 'min_version' : '7.1.0', 'fixed_version' : '8.1.0', 'fixed_display' : '8.1.13, 9.0.7, 9.1.0 or later'},
  { 'min_version' : '8.1.0', 'fixed_version' : '8.1.13' },
  { 'min_version' : '9.0.0', 'fixed_version' : '9.0.7' }
];

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