ESXi 6.0 / 6.5 / 6.7 Multiple Vulnerabilities (VMSA-2018-0027) (Remote Check)

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

include("compat.inc");

if (description)
{
  script_id(118885);
  script_version("1.6");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/09/02");

  script_cve_id("CVE-2018-6981", "CVE-2018-6982");
  script_bugtraq_id(105881, 105882);
  script_xref(name:"VMSA", value:"2018-0027");

  script_name(english:"ESXi 6.0 / 6.5 / 6.7 Multiple Vulnerabilities (VMSA-2018-0027) (Remote Check)");
  script_summary(english:"Checks the ESXi version and build number.");

  script_set_attribute(attribute:"synopsis", value:
"The remote VMware ESXi host is missing a security patch
and is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The remote VMware ESXi host is version 6.0, 6.5, or 6.7 and is
missing a security patch. It is, therefore, vulnerable to multiple
vulnerabilities. Leveraging the most severe of these vulnerabilities
could allow an attacker to execute arbitrary code on the host from
the security context of an unprivileged user on the guest system.

Note: CVE-2018-6982 only applies to ESXi 6.5 and 6.7 installations.
      ESXi 6.0 installations are not affected.");
  script_set_attribute(attribute:"see_also", value:"https://www.vmware.com/security/advisories/VMSA-2018-0027.html");
  script_set_attribute(attribute:"solution", value:
"Apply the appropriate patch as referenced in the vendor advisory.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/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:L/AC:L/PR:L/UI:N/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-2018-6981");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/11/09");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/11/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/11/12");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:vmware:esxi");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Misc.");

  script_copyright(english:"This script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("vmware_vsphere_detect.nbin");
  script_require_keys("Host/VMware/version", "Host/VMware/release", "Host/VMware/vsphere");

  exit(0);
}

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

fixes = make_array(
  '6.0', '10719132',
  '6.5', '10719125',
  '6.7', '10764712'
);

rel = get_kb_item_or_exit("Host/VMware/release");
if ("ESXi" >!< rel) audit(AUDIT_OS_NOT, "ESXi");

ver = get_kb_item_or_exit("Host/VMware/version");
port = get_kb_item_or_exit("Host/VMware/vsphere");

match = pregmatch(pattern:"^ESXi? ([0-9]+\.[0-9]+).*$", string:ver);
if (isnull(match)) audit(AUDIT_UNKNOWN_BUILD, "VMware ESXi", "6.0 / 6.5 / 6.7");
ver = match[1];

if (ver != '6.0' && ver != '6.5' && ver != '6.7')
  audit(AUDIT_OS_NOT, "ESXi 6.0 / 6.5 / 6.7");

fixed_build = fixes[ver];

if (empty_or_null(fixed_build)) audit(AUDIT_VER_FORMAT, ver);

match = pregmatch(pattern:'^VMware ESXi.*build-([0-9]+)$', string:rel);
if (isnull(match)) audit(AUDIT_UNKNOWN_BUILD, "VMware ESXi", "6.0 / 6.5 / 6.7");

build = int(match[1]);

if (build < fixed_build)
{
  report = '\n  ESXi version    : ' + ver +
           '\n  Installed build : ' + build +
           '\n  Fixed build     : ' + fixed_build +
           '\n';

  security_report_v4(port:port, severity:SECURITY_HOLE, extra:report);
}
else audit(AUDIT_INST_VER_NOT_VULN, "VMware ESXi", ver + " build " + build);