F5 Networks BIG-IP : BIG-IP HTTP/2 DoS (K000137106)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from F5 Networks BIG-IP Solution K000137106.
#
# @NOAGENT@
##

include('compat.inc');

if (description)
{
  script_id(183052);
  script_version("1.6");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/05/10");

  script_cve_id("CVE-2023-44487");
  script_xref(name:"CISA-KNOWN-EXPLOITED", value:"2023/10/31");
  script_xref(name:"CEA-ID", value:"CEA-2024-0004");
  script_xref(name:"IAVB", value:"2023-B-0083-S");
  script_xref(name:"IAVA", value:"2023-A-0537-S");

  script_name(english:"F5 Networks BIG-IP : BIG-IP HTTP/2 DoS (K000137106)");

  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 or equal to 17.1.0 / 16.1.4 / 15.1.10 / 
14.1.5 / 13.1.5. It is, therefore, affected by a vulnerability as referenced in the K000137106 advisory.
The HTTP/2 protocol allows a denial of service (server resource consumption) because request cancellation can 
reset many streams quickly, as exploited in the wild in August through October 2023. 

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://support.f5.com/csp/article/K000137106");
  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:N/AC:L/Au:N/C:N/I:N/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:N/UI:N/S:U/C:N/I:N/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-2023-44487");

  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:"2023/10/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/10/13");

  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:"former");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2023-2024 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 = 'K000137106';
var vmatrix = {
  'AFM': {
    'affected': [
      '17.1.0','16.1.0-16.1.4','15.1.0-15.1.10','14.1.0-14.1.5','13.1.0-13.1.5'
    ]
  },
  'APM': {
    'affected': [
      '17.1.0','16.1.0-16.1.4','15.1.0-15.1.10','14.1.0-14.1.5','13.1.0-13.1.5'
    ]
  },
  'ASM': {
    'affected': [
      '17.1.0','16.1.0-16.1.4','15.1.0-15.1.10','14.1.0-14.1.5','13.1.0-13.1.5'
    ]
  },
  'DNS': {
    'affected': [
      '17.1.0','16.1.0-16.1.4','15.1.0-15.1.10','14.1.0-14.1.5','13.1.0-13.1.5'
    ]
  },
  'GTM': {
    'affected': [
      '17.1.0','16.1.0-16.1.4','15.1.0-15.1.10','14.1.0-14.1.5','13.1.0-13.1.5'
    ]
  },
  'LTM': {
    'affected': [
      '17.1.0','16.1.0-16.1.4','15.1.0-15.1.10','14.1.0-14.1.5','13.1.0-13.1.5'
    ]
  },
  'PEM': {
    'affected': [
      '17.1.0','16.1.0-16.1.4','15.1.0-15.1.10','14.1.0-14.1.5','13.1.0-13.1.5'
    ]
  },
  'PSM': {
    'affected': [
      '17.1.0','16.1.0-16.1.4','15.1.0-15.1.10','14.1.0-14.1.5','13.1.0-13.1.5'
    ]
  },
  'WOM': {
    'affected': [
      '17.1.0','16.1.0-16.1.4','15.1.0-15.1.10','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');
}