VMware Fusion 7.x < 7.1.2 Shared Folders (HGFS) Guest Privilege Escalation (VMSA-2016-0001)

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

include("compat.inc");

if (description)
{
  script_id(87924);
  script_version("1.7");
  script_cvs_date("Date: 2019/11/22");

  script_cve_id("CVE-2015-6933");
  script_xref(name:"VMSA", value:"2016-0001");

  script_name(english:"VMware Fusion 7.x < 7.1.2 Shared Folders (HGFS) Guest Privilege Escalation (VMSA-2016-0001)");
  script_summary(english:"Checks Fusion version.");

  script_set_attribute(attribute:"synopsis", value:
"A virtualization application installed on the remote Mac OS X host is
affected by a guest privilege escalation vulnerability.");
  script_set_attribute(attribute:"description", value:
"The version of VMware Fusion installed on the remote Mac OS X host is
7.x prior to 7.1.2. It is, therefore, affected by a guest privilege
escalation vulnerability in the Shared Folders (HGFS) feature due to
improper validation of user-supplied input. A local attacker can
exploit this to corrupt memory, resulting in an elevation of
privileges.");
  script_set_attribute(attribute:"see_also", value:"http://www.vmware.com/security/advisories/VMSA-2016-0001.html");
  script_set_attribute(attribute:"solution", value:
"Upgrade to VMware Fusion 7.1.2 or later.

Note that VMware Tools in any Windows-based guests that use the Shared
Folders (HGFS) feature must also be updated to completely mitigate the
vulnerability.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/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:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2015-6933");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2016/01/07");
  script_set_attribute(attribute:"patch_publication_date", value:"2016/01/07");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/01/14");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:vmware:fusion");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("macosx_fusion_detect.nasl");
  script_require_keys("Host/local_checks_enabled", "MacOSX/Fusion/Version");

  exit(0);
}

include("audit.inc");
include("global_settings.inc");
include("misc_func.inc");

get_kb_item_or_exit("Host/local_checks_enabled");

os = get_kb_item("Host/MacOSX/Version");
if (!os) audit(AUDIT_OS_NOT, "Mac OS X");

version = get_kb_item_or_exit("MacOSX/Fusion/Version");
path = get_kb_item_or_exit("MacOSX/Fusion/Path");

fixed_version = '7.1.2';

if (
  version =~ "^7\." && ver_compare(ver:version, fix:"7.1.2", strict:FALSE) == -1
)
{
  if (report_verbosity > 0)
  {
    report =
      '\n  Path              : ' + path +
      '\n  Installed version : ' + version +
      '\n  Fixed version     : ' + fixed_version +
      '\n';
    security_warning(port:0, extra:report);
  }
  else security_warning(0);
  exit(0);
}
else audit(AUDIT_INST_PATH_NOT_VULN, "VMware Fusion", version, path);