Vulnerabilities > CVE-2019-8840 - Out-of-bounds Read vulnerability in Apple Xcode

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

include('compat.inc');

if (description)
{
  script_id(132047);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/05/05");

  script_cve_id("CVE-2019-8840");
  script_xref(name:"APPLE-SA", value:"APPLE-SA-2019-12-10-7");
  script_xref(name:"APPLE-SA", value:"HT210796");

  script_name(english:"Apple Xcode < 11.3 Code Execution (macOS)");

  script_set_attribute(attribute:"synopsis", value:
"An IDE application installed on the remote macOS or Mac OS X host is affected by a vulnerability.");
  script_set_attribute(attribute:"description", value:
"The version of Apple Xcode installed on the remote macOS or Mac OS X host is prior to 11.3. It is, therefore, affected
by a vulnerability in the ld64 component due to insufficient bounds checking. An attacker can exploit this
vulnerability by persuading a victim to open a specially crafted file in order to execute arbitrary code on the system
or cause a denial-of-service condition.

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://support.apple.com/en-us/HT210796");
  # https://lists.apple.com/archives/security-announce/2019/Dec/msg00006.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?e6953aa3");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Apple Xcode version 11.3 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/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:N/AC:L/PR:N/UI:R/S:C/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-2019-8840");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/12/10");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/12/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/12/13");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:apple:xcode");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"MacOS X Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("macosx_xcode_installed.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/MacOSX/Version", "installed_sw/Apple Xcode");

  exit(0);
}

include('vcf.inc');

get_kb_item_or_exit('Host/local_checks_enabled');

os = get_kb_item('Host/MacOSX/Version');
if (empty_or_null(os))
  audit(AUDIT_OS_NOT, 'macOS or Mac OS X');

app_info = vcf::get_app_info(app:'Apple Xcode');

vcf::check_granularity(app_info:app_info, sig_segments:2);

constraints = [
  { 'fixed_version' : '11.3' }
];

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