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(135903);
  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 macOS or Mac OS X 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 macOS or Mac OS X 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:"MacOS X Local Security Checks");

  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_mac_installed.nbin");
  script_require_keys("installed_sw/GlobalProtect", "Host/MacOSX/Version");

  exit(0);
}

include('vcf.inc');

get_kb_item_or_exit("Host/MacOSX/Version");

app_info = vcf::get_app_info(app:'GlobalProtect');

# Change app name for better reporting
app_info.app = 'Palo Alto GlobalProtect Agent';

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);