Palo Alto GlobalProtect Agent 5.0.x < 5.0.9 / 5.1.x < 5.1.1 Information Disclosure

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

include('compat.inc');

if (description)
{
  script_id(135904);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/06/03");

  script_cve_id("CVE-2020-1987");
  script_xref(name:"IAVA", value:"2020-A-0137-S");

  script_name(english:"Palo Alto GlobalProtect Agent 5.0.x < 5.0.9 / 5.1.x < 5.1.1 Information Disclosure");

  script_set_attribute(attribute:"synopsis", value:
"A VPN client installed on remote Windows host is affected by an information disclosure vulnerability.");
  script_set_attribute(attribute:"description", value:
"The version of Palo Alto GlobalProtect Agent installed on the remote Windows host is 5.0.x prior to 5.0.9, or 5.1.x
prior to 5.1.1. It is, therefore, affected by an information disclosure vulnerability due to extra information provided
when the troubleshooting log level is set to 'Dump'. An authenticated, local attacker can exploit this to disclose
potentially sensitive information, including VPN cookie information.

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-2020-1987");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Palo Alto GlobalProtect Agent 5.0.9, 5.1.1, or later");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:P/I:N/A:N");
  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:L/I:N/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-2020-1987");

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

  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:"2020/04/22");

  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:"Windows");

  script_copyright(english:"This script is Copyright (C) 2020-2021 and is owned by Tenable, Inc. or an Affiliate thereof.");

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

  exit(0);
}

include('vcf.inc');

get_kb_item_or_exit('SMB/Registry/Enumerated');

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

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

constraints = [
  {'min_version' : '5.0', 'fixed_version' : '5.0.9'},
  {'min_version' : '5.1', 'fixed_version' : '5.1.1'}
];

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