Vulnerabilities > CVE-2020-1990 - Out-of-bounds Write vulnerability in Paloaltonetworks Pan-Os

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

include("compat.inc");

if (description)
{
  script_id(135690);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/04/16");

  script_cve_id("CVE-2020-1990");
  script_xref(name: "IAVA", value:"2020-A-0137");

  script_name(english:"Palo Alto Networks PAN-OS  8.1.x < 8.1.13 /  9.0.x < 9.0.7 RCE");
  script_summary(english:"Checks the PAN-OS version.");

  script_set_attribute(attribute:"synopsis", value:
"The remote PAN-OS host is affected by a remote code execution vulnerability.");
  script_set_attribute(attribute:"description",value:
"The version of Palo Alto Networks PAN-OS running on the remote host is 8.1.x
prior to 8.1.13 or 9.0.x prior to 9.0.7. It is, therefore, affected by a remote
code execution vulnerability. An authenticated, remote attacker can exploit
this to upload a corrupted PAN-OS configuration and potentially execute code
with root privileges. ");
  # https://security.paloaltonetworks.com/CVE-2020-1990
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?a5ed573b");
  script_set_attribute(attribute:"solution", value:
"Upgrade to PAN-OS 8.1.13 / 9.0.7 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A: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_attribute(attribute:"cvss_score_source", value:"CVE-2020-1990");
  
  script_set_attribute(attribute:"vuln_publication_date", value:"2020/04/08");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/04/08");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/04/16");

  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('http_func.inc');

app_name = 'Palo Alto Networks PAN-OS';
port = get_http_port(default:443);

app_info = vcf::get_app_info(
    app: app_name,
    kb_ver:'Host/Palo_Alto/Firewall/Version',
    kb_source:'Host/Palo_Alto/Firewall/Source',
    port:port,
    service:TRUE
    );

vcf::check_granularity(app_info:app_info, sig_segments:2);

# Note, PA versions can also come like 9.0.7-h1. This won't parse correctly
#  with how vcf is now and should be paranoided.
constraints = [
  { 'min_version' : '8.1', 'fixed_version' : '8.1.13' },
  { 'min_version' : '9.0', 'fixed_version' : '9.0.7' }
];

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