F5 Networks BIG-IP : D-Bus vulnerability (K16729408) - Nessus

Medium Plugin ID: 154702

This page contains detailed information about the F5 Networks BIG-IP : D-Bus vulnerability (K16729408) Nessus plugin including available exploits and PoCs found on GitHub, in Metasploit or Exploit-DB for verifying of this vulnerability.

Table Of Contents

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Plugin Overview
Vulnerability Information

Synopsis
Description
Solution

Public Exploits
Risk Information
Plugin Source
How to Run
References
Version

Plugin Overview

ID: 154702
Name: F5 Networks BIG-IP : D-Bus vulnerability (K16729408)
Filename: f5_bigip_SOL16729408.nasl
Vulnerability Published: 2020-06-08
This Plugin Published: 2021-10-28
Last Modification Time: 2021-10-28
Plugin Version: 1.2
Plugin Type: local
Plugin Family: F5 Networks Local Security Checks
Dependencies: f5_bigip_detect.nbin
Required KB Items [?]: Host/BIG-IP/hotfix, Host/BIG-IP/modules, Host/BIG-IP/version, Host/local_checks_enabled, Settings/ParanoidReport

Vulnerability Information

Severity: Medium
Vulnerability Published: 2020-06-08
Patch Published: 2021-04-12
CVE [?]: CVE-2020-12049
CPE [?]: cpe:/a:f5:big-ip_access_policy_manager, cpe:/a:f5:big-ip_advanced_firewall_manager, cpe:/a:f5:big-ip_application_security_manager, cpe:/a:f5:big-ip_global_traffic_manager, cpe:/a:f5:big-ip_local_traffic_manager, cpe:/a:f5:big-ip_policy_enforcement_manager, cpe:/a:f5:big-ip_wan_optimization_manager, cpe:/h:f5:big-ip, cpe:/h:f5:big-ip_protocol_security_manager

Synopsis

The remote device is missing a vendor-supplied security patch.

Description

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 K16729408 advisory.

- An issue was discovered in dbus >= 1.3.0 before 1.12.18. The DBusServer in libdbus, as used in dbus- daemon, leaks file descriptors when a message exceeds the per-message file descriptor limit. A local attacker with access to the D-Bus system bus or another system service's private AF_UNIX socket could use this to make the system service reach its file descriptor limit, denying service to subsequent D-Bus clients. (CVE-2020-12049)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade to one of the non-vulnerable versions listed in the F5 Solution K16729408.

Public Exploits

Target Network Port(s): N/A
Target Asset(s): N/A
Exploit Available: True (GitHub)
Exploit Ease: Exploits (PoCs) are available

Here's the list of publicly known exploits and PoCs for verifying the F5 Networks BIG-IP : D-Bus vulnerability (K16729408) vulnerability:

GitHub: https://github.com/fbreton/lacework
[CVE-2020-12049]

Before running any exploit against any system, make sure you are authorized by the owner of the target system(s) to perform such activity. In any other case, this would be considered as an illegal activity.

WARNING: Beware of using unverified exploits from sources such as GitHub or Exploit-DB. These exploits and PoCs could contain malware. For more information, see how to use exploits safely.

Risk Information

CVSS Score Source [?]: CVE-2020-12049
CVSS V2 Vector: AV:L/AC:L/Au:N/C:N/I:N/A:C/E:U/RL:OF/RC:C

CVSS Base Score:	4.9 (Medium)
Impact Subscore:	6.9
Exploitability Subscore:	3.9
CVSS Temporal Score:	3.6 (Low)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	3.6 (Low)

CVSS V3 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C

CVSS Base Score:	5.5 (Medium)
Impact Subscore:	3.6
Exploitability Subscore:	1.8
CVSS Temporal Score:	4.8 (Medium)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	4.8 (Medium)

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Plugin Source

#%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 K16729408.
#
# @NOAGENT@
##

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

if (description)
{
  script_id(154702);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/10/28");

  script_cve_id("CVE-2020-12049");

  script_name(english:"F5 Networks BIG-IP : D-Bus vulnerability (K16729408)");

  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 K16729408 advisory.

  - An issue was discovered in dbus >= 1.3.0 before 1.12.18. The DBusServer in libdbus, as used in dbus-
    daemon, leaks file descriptors when a message exceeds the per-message file descriptor limit. A local
    attacker with access to the D-Bus system bus or another system service's private AF_UNIX socket could use
    this to make the system service reach its file descriptor limit, denying service to subsequent D-Bus
    clients. (CVE-2020-12049)

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/K16729408");
  script_set_attribute(attribute:"solution", value:
"Upgrade to one of the non-vulnerable versions listed in the F5 Solution K16729408.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:N/I:N/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:N/I:N/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-2020-12049");

  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:"2020/06/08");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/04/12");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/10/28");

  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_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_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2021 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');

var sol = 'K16729408';
var vmatrix = {
  'AFM': {
    'affected': [
      '16.0.0-16.1.0','15.1.0-15.1.3','14.1.0-14.1.4'
    ],
  },
  'APM': {
    'affected': [
      '16.0.0-16.1.0','15.1.0-15.1.3','14.1.0-14.1.4'
    ],
  },
  'ASM': {
    'affected': [
      '16.0.0-16.1.0','15.1.0-15.1.3','14.1.0-14.1.4'
    ],
  },
  'GTM': {
    'affected': [
      '16.0.0-16.1.0','15.1.0-15.1.3','14.1.0-14.1.4'
    ],
  },
  'LTM': {
    'affected': [
      '16.0.0-16.1.0','15.1.0-15.1.3','14.1.0-14.1.4'
    ],
  },
  'PEM': {
    'affected': [
      '16.0.0-16.1.0','15.1.0-15.1.3','14.1.0-14.1.4'
    ],
  },
  'PSM': {
    'affected': [
      '16.0.0-16.1.0','15.1.0-15.1.3','14.1.0-14.1.4'
    ],
  },
  'WOM': {
    'affected': [
      '16.0.0-16.1.0','15.1.0-15.1.3','14.1.0-14.1.4'
    ],
  }
};

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');
}

The latest version of this script can be found in these locations depending on your platform:

Linux / Unix:
/opt/nessus/lib/nessus/plugins/f5_bigip_SOL16729408.nasl
Windows:
C:\ProgramData\Tenable\Nessus\nessus\plugins\f5_bigip_SOL16729408.nasl
Mac OS X:
/Library/Nessus/run/lib/nessus/plugins/f5_bigip_SOL16729408.nasl

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How to Run

Here is how to run the F5 Networks BIG-IP : D-Bus vulnerability (K16729408) as a standalone plugin via the Nessus web user interface (https://localhost:8834/):

Click to start a New Scan.
Select Advanced Scan.
Navigate to the Plugins tab.
On the top right corner click to Disable All plugins.
On the left side table select F5 Networks Local Security Checks plugin family.
On the right side table select F5 Networks BIG-IP : D-Bus vulnerability (K16729408) plugin ID 154702.
Specify the target on the Settings tab and click to Save the scan.
Run the scan.

Here are a few examples of how to run the plugin in the command line. Note that the examples below demonstrate the usage on the Linux / Unix platform.

Basic usage:

/opt/nessus/bin/nasl f5_bigip_SOL16729408.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a f5_bigip_SOL16729408.nasl -t <IP/HOST>

Run the plugin with trace script execution written to the console (useful for debugging):

/opt/nessus/bin/nasl -T - f5_bigip_SOL16729408.nasl -t <IP/HOST>

Run the plugin with using a state file for the target and updating it (useful for running multiple plugins on the target):

/opt/nessus/bin/nasl -K /tmp/state f5_bigip_SOL16729408.nasl -t <IP/HOST>

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References

See also:

Similar and related Nessus plugins:

145859 - CentOS 8 : dbus (CESA-2020:3014)
138501 - CentOS 7 : dbus (CESA-2020:2894)
137205 - Debian DLA-2235-1 : dbus security update
139127 - EulerOS 2.0 SP8 : dbus (EulerOS-SA-2020-1797)
140006 - EulerOS Virtualization for ARM 64 3.0.6.0 : dbus (EulerOS-SA-2020-1903)
140352 - EulerOS Virtualization for ARM 64 3.0.2.0 : dbus (EulerOS-SA-2020-1982)
140863 - EulerOS 2.0 SP3 : dbus (EulerOS-SA-2020-2096)
142096 - EulerOS 2.0 SP5 : dbus (EulerOS-SA-2020-2242)
142290 - EulerOS 2.0 SP2 : dbus (EulerOS-SA-2020-2339)
142516 - EulerOS Virtualization 3.0.6.6 : dbus (EulerOS-SA-2020-2465)
147543 - EulerOS Virtualization 2.9.1 : dbus (EulerOS-SA-2021-1597)
151399 - EulerOS Virtualization 3.0.2.2 : dbus (EulerOS-SA-2021-2133)
138124 - FreeBSD : dbus file descriptor leak (27616957-b084-11ea-937b-b42e99a1b9c3)
138969 - GLSA-202007-46 : D-Bus: Denial of service
143967 - NewStart CGSL CORE 5.04 / MAIN 5.04 : dbus Vulnerability (NS-SA-2020-0081)
147248 - NewStart CGSL MAIN 6.02 : dbus Vulnerability (NS-SA-2021-0052)
154561 - NewStart CGSL CORE 5.05 / MAIN 5.05 : dbus Vulnerability (NS-SA-2021-0136)
152875 - openSUSE 15 Security Update : dbus-1 (openSUSE-SU-2021:1204-1)
152771 - openSUSE 15 Security Update : dbus-1 (openSUSE-SU-2021:2810-1)
138483 - Oracle Linux 7 : dbus (ELSA-2020-2894)
138975 - Oracle Linux 8 : dbus (ELSA-2020-3014)
138179 - Photon OS 2.0: Dbus PHSA-2020-2.0-0259
138386 - RHEL 7 : dbus (RHSA-2020:2894)
138803 - RHEL 8 : dbus (RHSA-2020:3014)
138800 - RHEL 8 : dbus (RHSA-2020:3044)
139322 - RHEL 8 : dbus (RHSA-2020:3298)
138419 - Scientific Linux Security Update : dbus on SL7.x x86_64 (20200713)
151995 - SUSE SLED12 / SLES12 Security Update : dbus-1 (SUSE-SU-2021:2424-1)
152110 - SUSE SLES15 Security Update : dbus-1 (SUSE-SU-2021:2470-1)
152186 - SUSE SLES12 Security Update : dbus-1 (SUSE-SU-2021:2590-1)
152763 - SUSE SLED15 / SLES15 Security Update : dbus-1 (SUSE-SU-2021:2810-1)
137556 - Ubuntu 16.04 LTS / 18.04 LTS / 19.10 / 20.04 : DBus vulnerability (USN-4398-1)

Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file f5_bigip_SOL16729408.nasl version 1.2. For more plugins, visit the Nessus Plugin Library.

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F5 Networks BIG-IP : D-Bus vulnerability (K16729408) - Nessus

Plugin Overview

Vulnerability Information

Synopsis

Description

Solution

Public Exploits

Risk Information

Plugin Source

How to Run

References

Version

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