F5 Networks BIG-IP : Linux kernel vulnerability (K67416037)

#%NASL_MIN_LEVEL 70300
##
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from F5 Networks BIG-IP Solution K67416037.
#
# @NOAGENT@
##

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

if (description)
{
  script_id(157329);
  script_version("1.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/01/04");

  script_cve_id("CVE-2021-23133");

  script_name(english:"F5 Networks BIG-IP : Linux kernel vulnerability (K67416037)");

  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 15.1.8 / 16.1.4 / 17.1.0. It is, therefore,
affected by a vulnerability as referenced in the K67416037 advisory.

  - A race condition in Linux kernel SCTP sockets (net/sctp/socket.c) before 5.12-rc8 can lead to kernel
    privilege escalation from the context of a network service or an unprivileged process. If
    sctp_destroy_sock is called without sock_net(sk)->sctp.addr_wq_lock then an element is removed from the
    auto_asconf_splist list without any proper locking. This can be exploited by an attacker with network
    service privileges to escalate to root or from the context of an unprivileged user directly if a
    BPF_CGROUP_INET_SOCK_CREATE is attached which denies creation of some SCTP socket. (CVE-2021-23133)

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/K67416037");
  script_set_attribute(attribute:"solution", value:
"Upgrade to one of the non-vulnerable versions listed in the F5 Solution K67416037.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:M/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-23133");

  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:"2021/04/22");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/02/02");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/02/02");

  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 = 'K67416037';
var vmatrix = {
  'AFM': {
    'affected': [
      '17.0.0','16.1.0-16.1.3','15.1.0-15.1.7','14.1.0-14.1.5','13.1.0-13.1.5'
    ],
    'unaffected': [
      '17.1.0','16.1.4','15.1.8'
    ],
  },
  'APM': {
    'affected': [
      '17.0.0','16.1.0-16.1.3','15.1.0-15.1.7','14.1.0-14.1.5','13.1.0-13.1.5'
    ],
    'unaffected': [
      '17.1.0','16.1.4','15.1.8'
    ],
  },
  'ASM': {
    'affected': [
      '17.0.0','16.1.0-16.1.3','15.1.0-15.1.7','14.1.0-14.1.5','13.1.0-13.1.5'
    ],
    'unaffected': [
      '17.1.0','16.1.4','15.1.8'
    ],
  },
  'DNS': {
    'affected': [
      '17.0.0','16.1.0-16.1.3','15.1.0-15.1.7','14.1.0-14.1.5','13.1.0-13.1.5'
    ],
    'unaffected': [
      '17.1.0','16.1.4','15.1.8'
    ],
  },
  'GTM': {
    'affected': [
      '17.0.0','16.1.0-16.1.3','15.1.0-15.1.7','14.1.0-14.1.5','13.1.0-13.1.5'
    ],
    'unaffected': [
      '17.1.0','16.1.4','15.1.8'
    ],
  },
  'LTM': {
    'affected': [
      '17.0.0','16.1.0-16.1.3','15.1.0-15.1.7','14.1.0-14.1.5','13.1.0-13.1.5'
    ],
    'unaffected': [
      '17.1.0','16.1.4','15.1.8'
    ],
  },
  'PEM': {
    'affected': [
      '17.0.0','16.1.0-16.1.3','15.1.0-15.1.7','14.1.0-14.1.5','13.1.0-13.1.5'
    ],
    'unaffected': [
      '17.1.0','16.1.4','15.1.8'
    ],
  },
  'PSM': {
    'affected': [
      '17.0.0','16.1.0-16.1.3','15.1.0-15.1.7','14.1.0-14.1.5','13.1.0-13.1.5'
    ],
    'unaffected': [
      '17.1.0','16.1.4','15.1.8'
    ],
  },
  'WOM': {
    'affected': [
      '17.0.0','16.1.0-16.1.3','15.1.0-15.1.7','14.1.0-14.1.5','13.1.0-13.1.5'
    ],
    'unaffected': [
      '17.1.0','16.1.4','15.1.8'
    ],
  }
};

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_WARNING,
      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');
}