Adobe Digital Editions <= 4.5.11.187245 Privilege Escalation (macOS) (APSB21-26)

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

include('compat.inc');

if (description)
{
  script_id(148710);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/09/16");

  script_cve_id("CVE-2021-21100");
  script_xref(name:"IAVA", value:"2021-A-0167-S");

  script_name(english:"Adobe Digital Editions <= 4.5.11.187245 Privilege Escalation (macOS) (APSB21-26)");

  script_set_attribute(attribute:"synopsis", value:
"An application installed on the remote macOS host is affected by a privilege escalation vulnerability.");
  script_set_attribute(attribute:"description", value:
"Adobe Digital Editions version 4.5.11.187245 (and earlier) is affected by a privilege escalation vulnerability during
installation. An unauthenticated attacker could leverage this vulnerability to achieve arbitrary file system write in
the context of the current user. Exploitation of this issue requires user interaction in that a victim must
open a malicious file.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version   
number.");
  # https://helpx.adobe.com/security/products/Digital-Editions/apsb21-26.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?3f95c468");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Adobe Digital Editions version 4.5.11.187606 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P");
  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:N/UI:R/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-2021-21100");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2021/04/13");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/04/13");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/04/16");

  script_set_attribute(attribute:"potential_vulnerability", value:"true");
  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:adobe:digital_editions");
  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) 2021 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("macosx_adobe_digital_editions_installed.nbin");
  script_require_keys("Host/local_checks_enabled", "Host/MacOSX/Version", "installed_sw/Adobe Digital Editions", "Settings/ParanoidReport");

  exit(0);
}

include('vcf.inc');

get_kb_item_or_exit("Host/MacOSX/Version");
get_kb_item_or_exit("Host/local_checks_enabled");

var app_info = vcf::get_app_info(app:'Adobe Digital Editions');

# making this paranoid until the detection fix is released
if (report_paranoia < 2) audit(AUDIT_PARANOID);

var constraints = [
  { 'max_version':'4.5.11.187245', 'fixed_display' : '4.5.11.187606' }
];

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