Cisco IOS XE Software Web UI RCE (cisco-sa-iosxe-webui-rce-uk8BXcUD) - Nessus

High Plugin ID: 137182

This page contains detailed information about the Cisco IOS XE Software Web UI RCE (cisco-sa-iosxe-webui-rce-uk8BXcUD) 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: 137182
Name: Cisco IOS XE Software Web UI RCE (cisco-sa-iosxe-webui-rce-uk8BXcUD)
Filename: cisco-sa-iosxe-webui-rce-uk8BXcUD-iosxe.nasl
Vulnerability Published: 2020-06-03
This Plugin Published: 2020-06-05
Last Modification Time: 2021-06-03
Plugin Version: 1.8
Plugin Type: local
Plugin Family: CISCO
Dependencies: cisco_ios_xe_version.nasl
Required KB Items [?]: Host/Cisco/IOS-XE/Version

Vulnerability Information

Severity: High
Vulnerability Published: 2020-06-03
Patch Published: 2020-06-03
CVE [?]: CVE-2020-3218
CPE [?]: cpe:/o:cisco:ios_xe

Synopsis

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

Description

According to its self-reported version, Cisco IOS XE Software is affected by a remote code execution vulnerability. An authenticated, remote attacker can exploit this, by supplying improperly validated input, to execute arbitrary code with root privileges on the underlying Linux shell.

Please see the included Cisco BIDs and Cisco Security Advisory for more information.

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 the relevant fixed version referenced in Cisco bug ID CSCvq01125 or apply the workaround mentioned in the advisory.

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 Cisco IOS XE Software Web UI RCE (cisco-sa-iosxe-webui-rce-uk8BXcUD) vulnerability:

GitHub: https://github.com/AlAIAL90/CVE-2020-3218
[CVE-2020-3218: PoC for exploiting CVE-2020-3218 : A vulnerability in the web UI of Cisco IOS XE ...]

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-2020-3218
CVSS V2 Vector: AV:N/AC:L/Au:S/C:C/I:C/A:C/E:U/RL:OF/RC:C

CVSS Base Score:	9.0 (High)
Impact Subscore:	10.0
Exploitability Subscore:	8.0
CVSS Temporal Score:	6.7 (Medium)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	6.7 (Medium)

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

CVSS Base Score:	7.2 (High)
Impact Subscore:	5.9
Exploitability Subscore:	1.2
CVSS Temporal Score:	6.3 (Medium)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	6.3 (Medium)

STIG Severity [?]: I
STIG Risk Rating: High

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Plugin Source

#TRUSTED 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
#
# (C) Tenable Network Security, Inc.
#

include('compat.inc');

if (description)
{
  script_id(137182);
  script_version("1.8");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/06/03");

  script_cve_id("CVE-2020-3218");
  script_xref(name:"CISCO-BUG-ID", value:"CSCvq01125");
  script_xref(name:"CISCO-SA", value:"cisco-sa-iosxe-webui-rce-uk8BXcUD");
  script_xref(name:"IAVA", value:"2020-A-0239-S");

  script_name(english:"Cisco IOS XE Software Web UI RCE (cisco-sa-iosxe-webui-rce-uk8BXcUD)");

  script_set_attribute(attribute:"synopsis", value:
"The remote device is missing a vendor-supplied security patch.");
  script_set_attribute(attribute:"description", value:
"According to its self-reported version, Cisco IOS XE Software is affected by
a remote code execution vulnerability. An authenticated, remote attacker can
exploit this, by supplying improperly validated input, to execute arbitrary
code with root privileges on the underlying Linux shell.

Please see the included Cisco BIDs and Cisco Security Advisory for more
information.

Note that Nessus has not tested for this issue but has instead relied only on
the application's self-reported version number.");
  # https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-webui-rce-uk8BXcUD
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?166cf8b9");
  script_set_attribute(attribute:"see_also", value:"http://tools.cisco.com/security/center/viewErp.x?alertId=ERP-73388");
  script_set_attribute(attribute:"see_also", value:"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvq01125");
  script_set_attribute(attribute:"solution", value:
"Upgrade to the relevant fixed version referenced in Cisco bug ID CSCvq01125
or apply the workaround mentioned in the advisory.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C");
  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: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-2020-3218");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_cwe_id(20);

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/06/03");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/06/03");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/06/05");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:ios_xe");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"CISCO");

  script_copyright(english:"This script is Copyright (C) 2020-2021 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("cisco_ios_xe_version.nasl");
  script_require_keys("Host/Cisco/IOS-XE/Version");

  exit(0);
}

include('cisco_workarounds.inc');
include('ccf.inc');

product_info = cisco::get_product_info(name:'Cisco IOS XE Software');

version_list=make_list(
  '16.9.4c',
  '16.9.4',
  '16.9.3s',
  '16.9.3h',
  '16.9.3a',
  '16.9.3',
  '16.9.2s',
  '16.9.2a',
  '16.9.2',
  '16.9.1s',
  '16.9.1d',
  '16.9.1c',
  '16.9.1b',
  '16.9.1a',
  '16.9.1',
  '16.8.3',
  '16.8.2',
  '16.8.1s',
  '16.8.1e',
  '16.8.1d',
  '16.8.1c',
  '16.8.1b',
  '16.8.1a',
  '16.8.1',
  '16.7.4',
  '16.7.3',
  '16.7.2',
  '16.7.1b',
  '16.7.1a',
  '16.7.1',
  '16.6.7a',
  '16.6.7',
  '16.6.6',
  '16.6.5b',
  '16.6.5a',
  '16.6.5',
  '16.6.4s',
  '16.6.4a',
  '16.6.4',
  '16.6.3',
  '16.6.2',
  '16.6.1',
  '16.12.1y',
  '16.11.1s',
  '16.11.1c',
  '16.11.1b',
  '16.11.1a',
  '16.11.1',
  '16.10.2',
  '16.10.1s',
  '16.10.1g',
  '16.10.1f',
  '16.10.1e',
  '16.10.1d',
  '16.10.1c',
  '16.10.1b',
  '16.10.1a',
  '16.10.1'
);

workarounds = make_list(CISCO_WORKAROUNDS['HTTP_Server_iosxe']);
workaround_params = {'no_active_sessions' : 1};

reporting = make_array(
'port'     , product_info['port'], 
'severity' , SECURITY_HOLE,
'version'  , product_info['version'],
'bug_id'   , 'CSCvq01125'
);

cisco::check_and_report(
  product_info:product_info,
  workarounds:workarounds,
  workaround_params:workaround_params,
  reporting:reporting,
  vuln_versions:version_list
);

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

Linux / Unix:
/opt/nessus/lib/nessus/plugins/cisco-sa-iosxe-webui-rce-uk8BXcUD-iosxe.nasl
Windows:
C:\ProgramData\Tenable\Nessus\nessus\plugins\cisco-sa-iosxe-webui-rce-uk8BXcUD-iosxe.nasl
Mac OS X:
/Library/Nessus/run/lib/nessus/plugins/cisco-sa-iosxe-webui-rce-uk8BXcUD-iosxe.nasl

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How to Run

Here is how to run the Cisco IOS XE Software Web UI RCE (cisco-sa-iosxe-webui-rce-uk8BXcUD) 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 CISCO plugin family.
On the right side table select Cisco IOS XE Software Web UI RCE (cisco-sa-iosxe-webui-rce-uk8BXcUD) plugin ID 137182.
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 cisco-sa-iosxe-webui-rce-uk8BXcUD-iosxe.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a cisco-sa-iosxe-webui-rce-uk8BXcUD-iosxe.nasl -t <IP/HOST>

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

/opt/nessus/bin/nasl -T - cisco-sa-iosxe-webui-rce-uk8BXcUD-iosxe.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 cisco-sa-iosxe-webui-rce-uk8BXcUD-iosxe.nasl -t <IP/HOST>

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References

IAVA | Information Assurance Vulnerability Alert:

2020-A-0239-S

Cisco Bug ID:

CSCvq01125

Cisco Security Advisory:

cisco-sa-iosxe-webui-rce-uk8BXcUD

CWE | Common Weakness Enumeration:

CWE-20 (Weakness) Improper Input Validation

See also:

Similar and related Nessus plugins:

138016 - Cisco IOS and IOS XE Software Common Industrial Protocol Denial of Service (cisco-sa-cipdos-hkfTZXEx)
138017 - Cisco IOS and IOS XE Software Common Industrial Protocol Denial of Service (cisco-sa-cipdos-hkfTZXEx)
137629 - Cisco IOS XE Software Denial of Service (cisco-sa-ewlc-dos-AnvKvMxR)
137835 - Cisco IOS Internet Key Exchange Version 2 DoS (cisco-sa-ikev2-9p23Jj2a)
137836 - Cisco IOS XE Internet Key Exchange Version 2 DoS (cisco-sa-ikev2-9p23Jj2a)
138092 - Cisco IOS XE Software Flexible NetFlow Version 9 DoS (cisco-sa-iosxe-fnfv9-dos-HND6Fc9u)
137361 - Cisco IOS XE Software Privilege Escalation (cisco-sa-priv-esc2-A6jVRu7C)
137144 - Cisco IOS Software Simple Network Management Protocol DoS (cisco-sa-snmp-dos-USxSyTk5)
137145 - Cisco IOS XE Software Simple Network Management Protocol DoS (cisco-sa-snmp-dos-USxSyTk5)
137630 - Cisco IOS and IOS XE Software Tcl Arbitrary Code Execution (cisco-sa-tcl-ace-C9KuVKmm)
137631 - Cisco IOS and IOS XE Software Tcl Arbitrary Code Execution (cisco-sa-tcl-ace-C9KuVKmm)

Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file cisco-sa-iosxe-webui-rce-uk8BXcUD-iosxe.nasl version 1.8. For more plugins, visit the Nessus Plugin Library.

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Cisco IOS XE Software Web UI RCE (cisco-sa-iosxe-webui-rce-uk8BXcUD) - Nessus

Plugin Overview

Vulnerability Information

Synopsis

Description

Solution

Public Exploits

Risk Information

Plugin Source

How to Run

References

Version

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