F5 Networks BIG-IP : Intel BIOS vulnerability (K55051330)

##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from F5 Networks BIG-IP Solution K55051330.
#
# @NOAGENT@
##

include('compat.inc');

if (description)
{
  script_id(162483);
  script_version("1.7");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/07/18");

  script_cve_id("CVE-2021-33123");

  script_name(english:"F5 Networks BIG-IP : Intel BIOS vulnerability (K55051330)");

  script_set_attribute(attribute:"synopsis", value:
"The remote device is missing a vendor-supplied security patch.");
  script_set_attribute(attribute:"description", value:
"The version of F5 Networks BIG-IP installed on the remote host is prior to tested version. It is, therefore, affected by
a vulnerability as referenced in the K55051330 advisory.

    Improper access control in the BIOS authenticated code module for some Intel(R) Processors may allow a
    privileged user to potentially enable escalation of privilege via local access. (CVE-2021-33123)ImpactA
    local attacker logged in as a privileged user can exploit the vulnerability to potentially enable
    escalation of privileges.The following F5 hardware platforms are vulnerable to CVE-2021-33123:BIG-IP
    i850BIG-IP i2000 seriesBIG-IP i4000 seriesBIG-IP i5000 seriesBIG-IP i7000 seriesBIG-IP i10000 seriesBIG-IP
    i11000 seriesBIG-IP i15000 seriesVIPRION B4450NVELOS BX110 bladeFor more information, refer toK9476: The
    F5 hardware/software compatibility matrixandK86001294: F5OS hardware/software support matrix.All versions
    of Virtual Edition (VE) for the BIG-IP and BIG-IQ products are potentially impacted if the processors
    underlying the VE installations areaffected. Microcode updates from Intel are available to address this
    issue but must be applied at the hardware level, which is outside the scope of the ability of F5 to
    support or patch.

Tenable has extracted the preceding description block directly from the F5 Networks BIG-IP security advisory.

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://my.f5.com/manage/s/article/K55051330");
  script_set_attribute(attribute:"solution", value:
"The vendor has acknowledged the vulnerability, but no solution has been provided.
Refer to the vendor for remediation guidance.");
  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:U/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-2021-33123");

  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:"2022/05/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/06/22");

  script_set_attribute(attribute:"potential_vulnerability", value:"true");
  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_access_policy_manager");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_advanced_firewall_manager");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_application_security_manager");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_domain_name_system");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_global_traffic_manager");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_local_traffic_manager");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_policy_enforcement_manager");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_wan_optimization_manager");
  script_set_attribute(attribute:"cpe", value:"cpe:/h:f5:big-ip_protocol_security_manager");
  script_set_attribute(attribute:"cpe", value:"cpe:/h:f5:big-ip");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"F5 Networks Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2022-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("f5_bigip_detect.nbin");
  script_require_keys("Host/local_checks_enabled", "Host/BIG-IP/hotfix", "Host/BIG-IP/modules", "Host/BIG-IP/version", "Settings/ParanoidReport");

  exit(0);
}


include('f5_func.inc');

if ( ! get_kb_item('Host/local_checks_enabled') ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var version = get_kb_item('Host/BIG-IP/version');
if ( ! version ) audit(AUDIT_OS_NOT, 'F5 Networks BIG-IP');
if ( isnull(get_kb_item('Host/BIG-IP/hotfix')) ) audit(AUDIT_KB_MISSING, 'Host/BIG-IP/hotfix');
if ( ! get_kb_item('Host/BIG-IP/modules') ) audit(AUDIT_KB_MISSING, 'Host/BIG-IP/modules');

if (report_paranoia < 2) audit(AUDIT_PARANOID);

var sol = 'K55051330';
var vmatrix = {
  'AFM': {
    'affected': [
      '17.0.0','16.1.0-16.1.3','15.1.0-15.1.6','14.1.0-14.1.5','13.1.0-13.1.5'
    ],
  },
  'APM': {
    'affected': [
      '17.0.0','16.1.0-16.1.3','15.1.0-15.1.6','14.1.0-14.1.5','13.1.0-13.1.5'
    ],
  },
  'ASM': {
    'affected': [
      '17.0.0','16.1.0-16.1.3','15.1.0-15.1.6','14.1.0-14.1.5','13.1.0-13.1.5'
    ],
  },
  'DNS': {
    'affected': [
      '17.0.0','16.1.0-16.1.3','15.1.0-15.1.6','14.1.0-14.1.5','13.1.0-13.1.5'
    ],
  },
  'GTM': {
    'affected': [
      '17.0.0','16.1.0-16.1.3','15.1.0-15.1.6','14.1.0-14.1.5','13.1.0-13.1.5'
    ],
  },
  'LTM': {
    'affected': [
      '17.0.0','16.1.0-16.1.3','15.1.0-15.1.6','14.1.0-14.1.5','13.1.0-13.1.5'
    ],
  },
  'PEM': {
    'affected': [
      '17.0.0','16.1.0-16.1.3','15.1.0-15.1.6','14.1.0-14.1.5','13.1.0-13.1.5'
    ],
  },
  'PSM': {
    'affected': [
      '17.0.0','16.1.0-16.1.3','15.1.0-15.1.6','14.1.0-14.1.5','13.1.0-13.1.5'
    ],
  },
  'WOM': {
    'affected': [
      '17.0.0','16.1.0-16.1.3','15.1.0-15.1.6','14.1.0-14.1.5','13.1.0-13.1.5'
    ],
  }
};

if (bigip_is_affected(vmatrix:vmatrix, sol:sol))
{
  var extra = NULL;
  if (report_verbosity > 0) extra = bigip_report_get();
  security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      extra      : extra
  );
}
else
{
  var tested = bigip_get_tested_modules();
  var audit_extra = 'For BIG-IP module(s) ' + tested + ',';
  if (tested) audit(AUDIT_INST_VER_NOT_VULN, audit_extra, version);
  else audit(AUDIT_HOST_NOT, 'running any of the affected modules');
}