VMware ESXi 7.0 / 8.0 Authenticaton Bypass (CVE-2024-37085)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

include('compat.inc');

if (description)
{
  script_id(201123);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/08/01");

  script_cve_id("CVE-2024-37085");
  script_xref(name:"VMSA", value:"2024-0013");
  script_xref(name:"IAVA", value:"2024-A-0373");
  script_xref(name:"CISA-KNOWN-EXPLOITED", value:"2024/08/20");

  script_name(english:"VMware ESXi 7.0 / 8.0 Authenticaton Bypass (CVE-2024-37085)");

  script_set_attribute(attribute:"synopsis", value:
"The remote VMware ESXi host is affected by an authentication bypass vulnerability.");
  script_set_attribute(attribute:"description", value:
"The version of VMware ESXi installed on the remote host is prior to 8.0 Update 3. It is, therefore, affected by an 
authentication bypass vulnerability as referenced in the VMSA-2024-0013 advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  # https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/24505
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?04fbf245");
  script_set_attribute(attribute:"solution", value:
"Upgrade to VMware ESXi 8.0 Update 3 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:M/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:F/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2024-37085");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2024/06/25");
  script_set_attribute(attribute:"patch_publication_date", value:"2024/06/25");
  script_set_attribute(attribute:"plugin_publication_date", value:"2024/06/28");

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

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

  script_copyright(english:"This script is Copyright (C) 2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

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

  exit(0);
}

# There are workarounds for CVE-2024-37085 via proper account setup, which we will not be checking for.
# We are setting this one to Paranoid for those reasons.
if (report_paranoia < 2)
  audit(AUDIT_PARANOID);

var fixes = make_array(
    '7.0.0', 24022510,
    '7.0.1', 24022510,
    '7.0.2', 24022510,
    '7.0.3', 24022510,
    '8.0.0', 24022510,
    '8.0.1', 24022510,
    '8.0.2', 24022510,
    '8.0.3', 24022510
);

var fixed_display = make_array(
    '7.0.0', '8.0U3 24022510',
    '7.0.1', '8.0U3 24022510',
    '7.0.2', '8.0U3 24022510',
    '7.0.3', '8.0U3 24022510',
    '8.0.0', '8.0U3 24022510',
    '8.0.1', '8.0U3 24022510',
    '8.0.2', '8.0U3 24022510',
    '8.0.3', '8.0U3 24022510'
);

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

var port  = get_kb_item_or_exit('Host/VMware/vsphere');

var match = pregmatch(pattern:"^VMware ESXi?o? ([0-9]+\.[0-9]+\.[0-9]+)", string:rel);
if (isnull(match)) audit(AUDIT_UNKNOWN_BUILD, 'VMware ESXi', '7.0 / 8.0');
var ver = match[1];

if (ver !~ "^((7|8)\.0)") audit(AUDIT_OS_NOT, 'ESXi 7.0 / 8.0');

var fixed_build = fixes[ver];

if (empty_or_null(fixed_build)) audit(AUDIT_INST_VER_NOT_VULN, 'VMware ESXi', ver);

match = pregmatch(pattern:"^VMware ESXi?o?.*build-([0-9]+)$", string:rel);
if (isnull(match)) audit(AUDIT_UNKNOWN_BUILD, 'VMware ESXi', '7.0 / 8.0');

var build = int(match[1]);

if (build >= fixed_build) audit(AUDIT_INST_VER_NOT_VULN, 'VMware ESXi', ver + ' build ' + build);

var report = '\n  ESXi version    : ' + rel +
         '\n  Installed build : ' + build +
         '\n  Fixed build     : ' + fixed_display[ver] +
         '\n';

security_report_v4(port:port, severity:SECURITY_HOLE, extra:report);