F5 Networks BIG-IP : Multiple Expat vulnerabilities (K19473898) - Nessus

Critical Plugin ID: 160392

This page contains detailed information about the F5 Networks BIG-IP : Multiple Expat vulnerabilities (K19473898) 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: 160392
Name: F5 Networks BIG-IP : Multiple Expat vulnerabilities (K19473898)
Filename: f5_bigip_SOL19473898.nasl
Vulnerability Published: 2022-01-24
This Plugin Published: 2022-04-30
Last Modification Time: 2022-05-03
Plugin Version: 1.3
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: Critical
Vulnerability Published: 2022-01-24
Patch Published: 2022-04-30
CVE [?]: CVE-2022-23852, CVE-2022-25235, CVE-2022-25236, CVE-2022-25315
CPE [?]: cpe:/a:f5:big-ip_application_security_manager, cpe:/h:f5:big-ip

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 multiple vulnerabilities as referenced in the K19473898 advisory.

- Expat (aka libexpat) before 2.4.4 has a signed integer overflow in XML_GetBuffer, for configurations with a nonzero XML_CONTEXT_BYTES. (CVE-2022-23852)

- xmltok_impl.c in Expat (aka libexpat) before 2.4.5 lacks certain validation of encoding, such as checks for whether a UTF-8 character is valid in a certain context. (CVE-2022-25235)

- xmlparse.c in Expat (aka libexpat) before 2.4.5 allows attackers to insert namespace-separator characters into namespace URIs. (CVE-2022-25236)

Note that Nessus has not tested for these issues 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 K19473898.

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 : Multiple Expat vulnerabilities (K19473898) vulnerability:

GitHub: https://github.com/Satheesh575555/external_expat_AOSP10_r33_CVE-2022-25236
[CVE-2022-25236]

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-2022-25315
CVSS V2 Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P/E:U/RL:OF/RC:C

CVSS Base Score:	7.5 (High)
Impact Subscore:	6.4
Exploitability Subscore:	10.0
CVSS Temporal Score:	5.5 (Medium)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	5.5 (Medium)

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

CVSS Base Score:	9.8 (Critical)
Impact Subscore:	5.9
Exploitability Subscore:	3.9
CVSS Temporal Score:	8.5 (High)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	8.5 (High)

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Plugin Source

#%NASL_MIN_LEVEL 70300
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from F5 Networks BIG-IP Solution K19473898.
#
# @NOAGENT@
##

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

if (description)
{
  script_id(160392);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/05/03");

  script_cve_id(
    "CVE-2022-23852",
    "CVE-2022-25235",
    "CVE-2022-25236",
    "CVE-2022-25315"
  );

  script_name(english:"F5 Networks BIG-IP : Multiple Expat vulnerabilities (K19473898)");

  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
multiple vulnerabilities as referenced in the K19473898 advisory.

  - Expat (aka libexpat) before 2.4.4 has a signed integer overflow in XML_GetBuffer, for configurations with
    a nonzero XML_CONTEXT_BYTES. (CVE-2022-23852)

  - xmltok_impl.c in Expat (aka libexpat) before 2.4.5 lacks certain validation of encoding, such as checks
    for whether a UTF-8 character is valid in a certain context. (CVE-2022-25235)

  - xmlparse.c in Expat (aka libexpat) before 2.4.5 allows attackers to insert namespace-separator characters
    into namespace URIs. (CVE-2022-25236)

Note that Nessus has not tested for these issues 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/K19473898");
  script_set_attribute(attribute:"solution", value:
"Upgrade to one of the non-vulnerable versions listed in the F5 Solution K19473898.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/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:N/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-2022-25315");

  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:"2022/01/24");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/04/30");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/04/30");

  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_application_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) 2022 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 = 'K19473898';
var vmatrix = {
  'ASM': {
    'affected': [
      '17.0.0','16.1.0-16.1.2','15.1.0-15.1.5','14.1.0-14.1.4','13.1.0-13.1.5','12.1.0-12.1.6','11.6.1-11.6.5'
    ],
  }
};

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 the affected module ASM');
}

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_SOL19473898.nasl
Windows:
C:\ProgramData\Tenable\Nessus\nessus\plugins\f5_bigip_SOL19473898.nasl
Mac OS X:
/Library/Nessus/run/lib/nessus/plugins/f5_bigip_SOL19473898.nasl

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How to Run

Here is how to run the F5 Networks BIG-IP : Multiple Expat vulnerabilities (K19473898) 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 : Multiple Expat vulnerabilities (K19473898) plugin ID 160392.
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_SOL19473898.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a f5_bigip_SOL19473898.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_SOL19473898.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_SOL19473898.nasl -t <IP/HOST>

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References

See also:

Similar and related Nessus plugins:

159166 - RHEL 8 : expat (RHSA-2022:1012)
159222 - RHEL 8 : Red Hat Virtualization Host security and enhancement update [ovirt-4.4.10] Async #2 (Important) (RHSA-2022:1053)
159284 - RHEL 7 : expat (RHSA-2022:1069)
159288 - RHEL 8 : expat (RHSA-2022:1070)
159295 - Oracle Linux 7 : expat (ELSA-2022-1069)
159301 - RHEL 8 : expat (RHSA-2022:1068)
159315 - CentOS 7 : firefox (CESA-2022:0824)
159320 - CentOS 7 : thunderbird (CESA-2022:0850)
159324 - CentOS 7 : expat (CESA-2022:1069)
159388 - SUSE SLES11 Security Update : expat (SUSE-SU-2022:14934-1)
159595 - RHEL 7 : RHV-H security update (redhat-virtualization-host) 4.3.22 (Important) (RHSA-2022:1263)
159688 - RHEL 6 : expat (RHSA-2022:1309)
159785 - EulerOS 2.0 SP9 : expat (EulerOS-SA-2022-1446)
159791 - EulerOS 2.0 SP9 : expat (EulerOS-SA-2022-1425)
160127 - EulerOS 2.0 SP5 : expat (EulerOS-SA-2022-1529)
160143 - EulerOS 2.0 SP8 : expat (EulerOS-SA-2022-1562)
160270 - Amazon Linux 2 : thunderbird (ALAS-2022-1779)
160580 - EulerOS Virtualization 2.9.1 : expat (EulerOS-SA-2022-1605)
160602 - EulerOS Virtualization 2.9.0 : expat (EulerOS-SA-2022-1628)

Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file f5_bigip_SOL19473898.nasl version 1.3. For more plugins, visit the Nessus Plugin Library.

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F5 Networks BIG-IP : Multiple Expat vulnerabilities (K19473898) - Nessus

Plugin Overview

Vulnerability Information

Synopsis

Description

Solution

Public Exploits

Risk Information

Plugin Source

How to Run

References

Version

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