F5 Networks BIG-IP : BIG-IP tmsh vulnerability (K01067037)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from F5 Networks BIG-IP Solution K01067037.
#
# The text description of this plugin is (C) F5 Networks.
#

include('compat.inc');

if (description)
{
  script_id(118615);
  script_version("1.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/11/02");

  script_cve_id("CVE-2018-15321");

  script_name(english:"F5 Networks BIG-IP : BIG-IP tmsh vulnerability (K01067037)");

  script_set_attribute(attribute:"synopsis", value:
"The remote device is missing a vendor-supplied security patch.");
  script_set_attribute(attribute:"description", value:
"When BIG-IP is licensed for Appliance mode, Admin and Resource
administrator roles can by-pass BIG-IP Appliance mode restrictions to
overwrite critical system files. (CVE-2018-15321)

Attackers with ahigh-privilege level can overwrite critical system
files, which in turnbypasses security controls thatlimit TMOS Shell (
tmsh ) commands.This scenario is possible when the Administrator
orResource Administrator roles are granted tmsh access.Resource
Administrator roles must have tmsh access to perform this attack.

Note : F5 does not consider the capability of Advanced Shell ( bash )
access in this vulnerability, as users granted that level of access
can simply perform any command as root. This vulnerability is an issue
for Appliance mode, users who are granted tmsh access, and for the
Resource Administrator role when operating in standard, non-Appliance
mode.

Impact

When the BIG-IP system is licensed for Appliance mode, Administrator
and Resource Administrator roles can by-pass BIG-IP Appliance mode
restrictions to overwrite critical system files.");
  script_set_attribute(attribute:"see_also", value:"https://my.f5.com/manage/s/article/K01067037");
  script_set_attribute(attribute:"solution", value:
"Upgrade to one of the non-vulnerable versions listed in the F5 Solution K01067037.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/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:H/UI:N/S:U/C:N/I:H/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2018-15321");

  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:"2018/10/31");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/10/30");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/11/02");

  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_acceleration_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_application_visibility_and_reporting");
  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_link_controller");
  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_webaccelerator");
  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) 2018-2023 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 = 'K01067037';
var vmatrix = {
  'AFM': {
    'affected': [
      '14.0.0','13.0.0-13.1.0','12.1.0-12.1.3','11.6.0-11.6.3','11.2.1-11.5.6'
    ],
    'unaffected': [
      '14.1.0','14.0.0.3','13.1.0.6','12.1.3.6','11.6.3.3','11.5.7'
    ],
  },
  'AM': {
    'affected': [
      '14.0.0','13.0.0-13.1.0','12.1.0-12.1.3','11.6.0-11.6.3','11.2.1-11.5.6'
    ],
    'unaffected': [
      '14.1.0','14.0.0.3','13.1.0.6','12.1.3.6','11.6.3.3','11.5.7'
    ],
  },
  'APM': {
    'affected': [
      '14.0.0','13.0.0-13.1.0','12.1.0-12.1.3','11.6.0-11.6.3','11.2.1-11.5.6'
    ],
    'unaffected': [
      '14.1.0','14.0.0.3','13.1.0.6','12.1.3.6','11.6.3.3','11.5.7'
    ],
  },
  'ASM': {
    'affected': [
      '14.0.0','13.0.0-13.1.0','12.1.0-12.1.3','11.6.0-11.6.3','11.2.1-11.5.6'
    ],
    'unaffected': [
      '14.1.0','14.0.0.3','13.1.0.6','12.1.3.6','11.6.3.3','11.5.7'
    ],
  },
  'AVR': {
    'affected': [
      '14.0.0','13.0.0-13.1.0','12.1.0-12.1.3','11.6.0-11.6.3','11.2.1-11.5.6'
    ],
    'unaffected': [
      '14.1.0','14.0.0.3','13.1.0.6','12.1.3.6','11.6.3.3','11.5.7'
    ],
  },
  'DNS': {
    'affected': [
      '14.0.0','13.0.0-13.1.0','12.1.0-12.1.3','11.6.0-11.6.3','11.2.1-11.5.6'
    ],
    'unaffected': [
      '14.1.0','14.0.0.3','13.1.0.6','12.1.3.6','11.6.3.3','11.5.7'
    ],
  },
  'GTM': {
    'affected': [
      '14.0.0','13.0.0-13.1.0','12.1.0-12.1.3','11.6.0-11.6.3','11.2.1-11.5.6'
    ],
    'unaffected': [
      '14.1.0','14.0.0.3','13.1.0.6','12.1.3.6','11.6.3.3','11.5.7'
    ],
  },
  'LC': {
    'affected': [
      '14.0.0','13.0.0-13.1.0','12.1.0-12.1.3','11.6.0-11.6.3','11.2.1-11.5.6'
    ],
    'unaffected': [
      '14.1.0','14.0.0.3','13.1.0.6','12.1.3.6','11.6.3.3','11.5.7'
    ],
  },
  'LTM': {
    'affected': [
      '14.0.0','13.0.0-13.1.0','12.1.0-12.1.3','11.6.0-11.6.3','11.2.1-11.5.6'
    ],
    'unaffected': [
      '14.1.0','14.0.0.3','13.1.0.6','12.1.3.6','11.6.3.3','11.5.7'
    ],
  },
  'PEM': {
    'affected': [
      '14.0.0','13.0.0-13.1.0','12.1.0-12.1.3','11.6.0-11.6.3','11.2.1-11.5.6'
    ],
    'unaffected': [
      '14.1.0','14.0.0.3','13.1.0.6','12.1.3.6','11.6.3.3','11.5.7'
    ],
  },
  'WAM': {
    'affected': [
      '14.0.0','13.0.0-13.1.0','12.1.0-12.1.3','11.6.0-11.6.3','11.2.1-11.5.6'
    ],
    'unaffected': [
      '14.1.0','14.0.0.3','13.1.0.6','12.1.3.6','11.6.3.3','11.5.7'
    ],
  }
};

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');
}