Palo Alto Networks PAN-OS 7.1.x < 7.1.26 / 8.0.x < 8.0.14 Open Redirection

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

include('compat.inc');

if (description)
{
  script_id(136818);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/10/13");

  script_cve_id("CVE-2020-1997");
  script_xref(name:"IAVA", value:"2020-A-0222-S");

  script_name(english:"Palo Alto Networks PAN-OS 7.1.x < 7.1.26 / 8.0.x < 8.0.14 Open Redirection");

  script_set_attribute(attribute:"synopsis", value:
"The remote PAN-OS host is affected by an open redirection 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 7.1.26 or 8.0.x prior to 8.0.14.
It is, therefore, affected by an open redirection vulnerability.

  - An open redirection vulnerability in the GlobalProtect
    component of Palo Alto Networks PAN-OS allows an
    attacker to specify an arbitrary redirection target away
    from the trusted GlobalProtect gateway. If the user then
    successfully authenticates it will cause them to access
    an unexpected and potentially malicious website. This
    issue affects: PAN-OS 7.1 versions earlier than 7.1.26;
    PAN-OS 8.0 versions earlier than 8.0.14. (CVE-2020-1997)

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-2020-1997");
  script_set_attribute(attribute:"see_also", value:"https://cwe.mitre.org/data/definitions/601.html");
  script_set_attribute(attribute:"solution", value:
"Upgrade to PAN-OS 7.1.26 / 8.0.14 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:N");
  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:N/UI:R/S:C/C:L/I:L/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-1997");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_cwe_id(601);

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/05/13");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/05/13");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/05/22");

  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' : '7.1.26' },
  { 'min_version' : '8.0.0', 'fixed_version' : '8.0.14' }
];

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