VMware vCenter Server < 7.0 U2d Multiple Vulnerabilities (VMSA-2021-0020)

#%NASL_MIN_LEVEL 70300
##
# (C) Tenable Network Security, Inc.
##

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(153546);
  script_version("1.7");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/06/30");

  script_cve_id("CVE-2021-22011", "CVE-2021-22018");
  script_xref(name:"IAVA", value:"2021-A-0434-S");

  script_name(english:"VMware vCenter Server < 7.0 U2d Multiple Vulnerabilities (VMSA-2021-0020)");

  script_set_attribute(attribute:"synopsis", value:
"A virtualization management application installed on the remote host is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The version of VMware vCenter Server installed on the remote host is prior to 7.0 U2d. It is, therefore, affected
 by multiple vulnerabilities:

    - An unauthenticated API endpoint vulnerability exists in the vCenter Server Content Library. An 
      unauthenticated, remote attacker can exploit this to perform unauthenticated VM network setting
      manipulation. (CVE-2021-22011)

    - A file deletion vulnerability exists in the VMware vSphere Life-cycle Manager plug-in. 
      A unauthenticated, remote attacker can exploit this to delete non-critical files. 
      (CVE-2021-22018)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version   
number. Nessus has also not tested for the presence of a workaround.");
  script_set_attribute(attribute:"see_also", value:"https://www.vmware.com/security/advisories/VMSA-2021-0020.html");
  script_set_attribute(attribute:"solution", value:
"Upgrade to VMware vCenter Server 7.0 U2d or later or apply the workaround mentioned in the advisory.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/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:N/UI:N/S:U/C:N/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-2021-22018");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2021/09/21");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/09/21");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/09/22");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:vmware:vcenter_server");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2021-2023 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("vmware_vcenter_detect.nbin");
  script_require_keys("Host/VMware/vCenter", "Host/VMware/version", "Host/VMware/release");
  script_require_ports("Services/www", 80, 443);

  exit(0);
}

var fixes = make_array(
  '7.0', '18455184'  # 7.0 U2d
);

var port = get_kb_item_or_exit('Host/VMware/vCenter');
var version = get_kb_item_or_exit('Host/VMware/version');
var release = get_kb_item_or_exit('Host/VMware/release');

# Extract and verify the build number
var build = ereg_replace(pattern:"^VMware vCenter Server [0-9\\.]+ build-([0-9]+)$", string:release, replace:"\1");
if (build !~ "^[0-9]+$") audit(AUDIT_UNKNOWN_BUILD, 'VMware vCenter 7.0');

var match = pregmatch(pattern:"^VMware vCenter ([0-9]+\.[0-9]+).*$", string:version);
if (isnull(match)) audit(AUDIT_OS_NOT, 'VMware vCenter 7.0');

var ver = match[1];
if (ver !~ "^(7\.0)$") audit(AUDIT_OS_NOT, 'VMware vCenter 7.0');

var fixed_build = int(fixes[ver]);
if (empty_or_null(fixed_build)) audit(AUDIT_VER_FORMAT, ver);

release = release - 'VMware vCenter Server ';
if (build >= fixed_build)
  audit(AUDIT_LISTEN_NOT_VULN, 'VMware vCenter', port, release);

var report = '\n  VMware vCenter version    : ' + ver +
         '\n  Installed build           : ' + build +
         '\n  Fixed build               : ' + fixed_build +
         '\n';

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