Palo Alto GlobalProtect Agent 5.2.x < 5.2.9 Privilege Escalation

#%NASL_MIN_LEVEL 70300
##
# (C) Tenable, Inc.
##

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(158085);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/06/16");

  script_cve_id("CVE-2022-0016");
  script_xref(name:"IAVA", value:"2022-A-0085-S");

  script_name(english:"Palo Alto GlobalProtect Agent 5.2.x < 5.2.9 Privilege Escalation");

  script_set_attribute(attribute:"synopsis", value:
"A VPN client installed on remote host is affected by a privilege escalation vulnerability.");
  script_set_attribute(attribute:"description", value:
"The version of Palo Alto GlobalProtect Agent installed on the remote host is 5.2.x prior to 5.2.9. It is, therefore,
affected by a privilege escalation vulnerability in the Connect Before Logon feature due to improper handling of
exceptional conditions. An unauthenticated, local attacker can exploit this, by authenticating with Connect Before Logon
under certain circumstances, to escalate to SYSTEM or 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-2022-0016");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Palo Alto GlobalProtect Agent 5.2.9 or later");
  script_set_attribute(attribute:"agent", value:"all");
  script_set_cvss_base_vector("CVSS2#AV:L/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:L/AC:L/PR:L/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-2022-0016");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2022/02/09");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/02/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/02/16");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:paloaltonetworks:globalprotect");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Misc.");

  script_copyright(english:"This script is Copyright (C) 2022-2023 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("palo_alto_globalprotect_agent_win_installed.nbin", "palo_alto_globalprotect_agent_mac_installed.nbin");
  script_require_keys("installed_sw/Palo Alto GlobalProtect Agent");

  exit(0);
}

include('vcf.inc');

var win_local = FALSE;
if (get_kb_item("SMB/Registry/Enumerated")) win_local = TRUE;

var app_info = vcf::get_app_info(app:'Palo Alto GlobalProtect Agent', win_local:win_local);

vcf::check_granularity(app_info:app_info, sig_segments:3);

var constraints = [
    { 'min_version' : '5.2', 'fixed_version' : '5.2.9' }
  ];

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