Cisco IOS, IOS XE, and NX-OS Software Security Group Tag Exchange Protocol Denial of Service Vulnerability (cisco-sa-sxp-68TEVzR) - Nessus

High Plugin ID: 137656

This page contains detailed information about the Cisco IOS, IOS XE, and NX-OS Software Security Group Tag Exchange Protocol Denial of Service Vulnerability (cisco-sa-sxp-68TEVzR) 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: 137656
Name: Cisco IOS, IOS XE, and NX-OS Software Security Group Tag Exchange Protocol Denial of Service Vulnerability (cisco-sa-sxp-68TEVzR)
Filename: cisco-sa-sxp-68TEVzR.nasl
Vulnerability Published: 2020-06-03
This Plugin Published: 2020-06-19
Last Modification Time: 2021-04-28
Plugin Version: 1.10
Plugin Type: combined
Plugin Family: CISCO
Dependencies: cisco_nxos_version.nasl
Required KB Items [?]: Host/Cisco/NX-OS/Device, Host/Cisco/NX-OS/Model, Host/Cisco/NX-OS/Version

Vulnerability Information

Severity: High
Vulnerability Published: 2020-06-03
Patch Published: 2020-06-03
CVE [?]: CVE-2020-3228
CPE [?]: cpe:/o:cisco:nx-os

Synopsis

The remote device is missing a vendor-supplied security patch

Description

According to its self-reported version, Cisco NX-OS Software is affected by a vulnerability. Please see the included Cisco BIDs and Cisco Security Advisory for more information.

Solution

Upgrade to the relevant fixed version referenced in Cisco bug IDs CSCvd71220, CSCvp96954, CSCvt30182

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, IOS XE, and NX-OS Software Security Group Tag Exchange Protocol Denial of Service Vulnerability (cisco-sa-sxp-68TEVzR) vulnerability:

GitHub: https://github.com/AlAIAL90/CVE-2020-3228
[CVE-2020-3228: PoC for exploiting CVE-2020-3228 : A vulnerability in Security Group Tag Exchange ...]

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-2020-3228
CVSS V2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C/E:U/RL:OF/RC:C

CVSS Base Score:	7.8 (High)
Impact Subscore:	6.9
Exploitability Subscore:	10.0
CVSS Temporal Score:	5.8 (Medium)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	5.8 (Medium)

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

CVSS Base Score:	8.6 (High)
Impact Subscore:	4.0
Exploitability Subscore:	3.9
CVSS Temporal Score:	7.5 (High)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	7.5 (High)

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(137656);
  script_version("1.10");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/04/28");

  script_cve_id("CVE-2020-3228");
  script_xref(name:"CISCO-BUG-ID", value:"CSCvd71220");
  script_xref(name:"CISCO-BUG-ID", value:"CSCvp96954");
  script_xref(name:"CISCO-BUG-ID", value:"CSCvt30182");
  script_xref(name:"CISCO-SA", value:"cisco-sa-sxp-68TEVzR");
  script_xref(name:"IAVA", value:"2020-A-0260");

  script_name(english:"Cisco IOS, IOS XE, and NX-OS Software Security Group Tag Exchange Protocol Denial of Service Vulnerability (cisco-sa-sxp-68TEVzR)");

  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 NX-OS Software is affected by a vulnerability. Please see the included
Cisco BIDs and Cisco Security Advisory for more information.");
  # https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sxp-68TEVzR
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?cc568213");
  script_set_attribute(attribute:"see_also", value:"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvd71220");
  script_set_attribute(attribute:"see_also", value:"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvp96954");
  script_set_attribute(attribute:"see_also", value:"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvt30182");
  script_set_attribute(attribute:"solution", value:
"Upgrade to the relevant fixed version referenced in Cisco bug IDs CSCvd71220, CSCvp96954, CSCvt30182");
  script_set_cvss_base_vector("CVSS2#AV:N/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:N/AC:L/PR:N/UI:N/S:C/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-2020-3228");

  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:"2020/06/19");

  script_set_attribute(attribute:"plugin_type", value:"combined");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:nx-os");
  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_nxos_version.nasl");
  script_require_keys("Host/Cisco/NX-OS/Version", "Host/Cisco/NX-OS/Model", "Host/Cisco/NX-OS/Device");

  exit(0);
}

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

product_info = cisco::get_product_info(name:'Cisco NX-OS Software');

if ('nexus' >!< tolower(product_info.device) || tolower(product_info.model) !~ "^(1000v?|(70[0-9]{2}))")
  audit(AUDIT_HOST_NOT, 'an affected model');

if (product_info.model =~ "^70[0-9]{2}") {
  version_list = make_list('8.0(1)');
}
else if (tolower(product_info.model) =~ "^1000(v)?") {
  version_list = make_list(
    '5.2(1)SV3(3.1)',
    '5.2(1)SV3(3.15)',
    '5.2(1)SV3(4.1)',
    '5.2(1)SV3(4.1a)',
    '5.2(1)SV3(4.1b)',
    '5.2(1)SV5(1.1)',
    '5.2(1)SV5(1.2)',
    '5.2(1)SV5(1.3)'
  );
}

reporting = make_array(
  'port'     , 0,
  'severity' , SECURITY_HOLE,
  'version'  , product_info['version'],
  'bug_id'   , 'CSCvd71220, CSCvp96954, CSCvt30182'
);

workarounds = make_list(CISCO_WORKAROUNDS['generic_workaround']);
workaround_params = WORKAROUND_CONFIG['cts_sxp'];

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

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-sxp-68TEVzR.nasl
Windows:
C:\ProgramData\Tenable\Nessus\nessus\plugins\cisco-sa-sxp-68TEVzR.nasl
Mac OS X:
/Library/Nessus/run/lib/nessus/plugins/cisco-sa-sxp-68TEVzR.nasl

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How to Run

Here is how to run the Cisco IOS, IOS XE, and NX-OS Software Security Group Tag Exchange Protocol Denial of Service Vulnerability (cisco-sa-sxp-68TEVzR) 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, IOS XE, and NX-OS Software Security Group Tag Exchange Protocol Denial of Service Vulnerability (cisco-sa-sxp-68TEVzR) plugin ID 137656.
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-sxp-68TEVzR.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a cisco-sa-sxp-68TEVzR.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-sxp-68TEVzR.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-sxp-68TEVzR.nasl -t <IP/HOST>

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References

IAVA | Information Assurance Vulnerability Alert:

2020-A-0260

Cisco Bug ID:

CSCvd71220, CSCvp96954, CSCvt30182

Cisco Security Advisory:

cisco-sa-sxp-68TEVzR

CWE | Common Weakness Enumeration:

CWE-20 (Weakness) Improper Input Validation

See also:

Similar and related Nessus plugins:

137654 - Cisco IOS, IOS XE, and NX-OS Software Security Group Tag Exchange Protocol Denial of Service Vulnerability (cisco-sa-sxp-68TEVzR)
137655 - Cisco IOS, IOS XE, and NX-OS Software Security Group Tag Exchange Protocol Denial of Service Vulnerability (cisco-sa-sxp-68TEVzR)
137901 - Cisco IOS Software One Platform Kit Remote Code Execution Vulnerability (cisco-sa-ios-nxos-onepk-rce-6Hhyt4dC)
137902 - IOS XE Software One Platform Kit Remote Code Execution Vulnerability (cisco-sa-ios-nxos-onepk-rce-6Hhyt4dC)
137903 - Cisco NX-OS Software One Platform Kit Remote Code Execution Vulnerability (cisco-sa-ios-nxos-onepk-rce-6Hhyt4dC)

Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file cisco-sa-sxp-68TEVzR.nasl version 1.10. For more plugins, visit the Nessus Plugin Library.

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Cisco IOS, IOS XE, and NX-OS Software Security Group Tag Exchange Protocol Denial of Service Vulnerability (cisco-sa-sxp-68TEVzR) - Nessus

Plugin Overview

Vulnerability Information

Synopsis

Description

Solution

Public Exploits

Risk Information

Plugin Source

How to Run

References

Version

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