Cisco Data Center Network Manager < 11.1(1) Authentication Bypass Vulnerability - Nessus

Critical Plugin ID: 126643

This page contains detailed information about the Cisco Data Center Network Manager < 11.1(1) Authentication Bypass Vulnerability 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: 126643
Name: Cisco Data Center Network Manager < 11.1(1) Authentication Bypass Vulnerability
Filename: cisco-sa-20190626-dcnm-bypass.nasl
Vulnerability Published: 2019-06-26
This Plugin Published: 2019-07-12
Last Modification Time: 2020-09-24
Plugin Version: 1.7
Plugin Type: remote
Plugin Family: CISCO
Dependencies: cisco_prime_dcnm_web_detect.nasl
Required KB Items [?]: installed_sw/cisco_dcnm_web

Vulnerability Information

Severity: Critical
Vulnerability Published: 2019-06-26
Patch Published: 2019-06-26
CVE [?]: CVE-2019-1619
CPE [?]: cpe:/a:cisco:data_center_network_manager

Synopsis

The remote device is missing a vendor-supplied security patch

Description

A vulnerability in the web-based management interface of Cisco Data Center Network Manager (DCNM) could allow an unauthenticated, remote attacker to bypass authentication and execute arbitrary actions with administrative privileges on an affected device. The vulnerability is due to improper session management on affected DCNM software. An attacker could exploit this vulnerability by sending a crafted HTTP request to the affected device. A successful exploit could allow the attacker to gain administrative access on the affected device.

According to its self-reported version, Cisco Data Center Network Manager 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 ID CSCvo64641

Public Exploits

Target Network Port(s): 80
Target Asset(s): Services/www
Exploit Available: True (Metasploit Framework, Exploit-DB, Core Impact)
Exploit Ease: Exploits are available

Here's the list of publicly known exploits and PoCs for verifying the Cisco Data Center Network Manager < 11.1(1) Authentication Bypass Vulnerability vulnerability:

Metasploit: exploit/multi/http/cisco_dcnm_upload_2019
[Cisco Data Center Network Manager Unauthenticated Remote Code Execution]
Metasploit: auxiliary/admin/networking/cisco_dcnm_download
[Cisco Data Center Network Manager Unauthenticated File Download]
Exploit-DB: exploits/java/remote/47347.rb
[EDB-47347: Cisco Data Center Network Manager - Unauthenticated Remote Code Execution (Metasploit)]

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-2019-1619
CVSS V2 Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P/E:F/RL:OF/RC:C

CVSS Base Score:	7.5 (High)
Impact Subscore:	6.4
Exploitability Subscore:	10.0
CVSS Temporal Score:	6.2 (Medium)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	6.2 (Medium)

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

CVSS Base Score:	9.8 (Critical)
Impact Subscore:	5.9
Exploitability Subscore:	3.9
CVSS Temporal Score:	9.1 (Critical)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	9.1 (Critical)

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

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Plugin Source

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

include("compat.inc");

if (description)
{
  script_id(126643);
  script_version("1.7");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/09/24");

  script_cve_id("CVE-2019-1619");
  script_bugtraq_id(108902);
  script_xref(name:"CISCO-BUG-ID", value:"CSCvo64641");
  script_xref(name:"CISCO-SA", value:"cisco-sa-20190626-dcnm-bypass");
  script_xref(name:"IAVA", value:"2019-A-0221");

  script_name(english:"Cisco Data Center Network Manager < 11.1(1) Authentication Bypass Vulnerability");
  script_summary(english:"Checks the version of Cisco Data Center Network Manager");

  script_set_attribute(attribute:"synopsis", value:
"The remote device is missing a vendor-supplied security patch");
  script_set_attribute(attribute:"description", value:
"A vulnerability in the web-based management interface of Cisco Data
Center Network Manager (DCNM) could allow an unauthenticated, remote
attacker to bypass authentication and execute arbitrary actions with
administrative privileges on an affected device. The vulnerability is
 due to improper session management on affected DCNM software.
 An attacker could exploit this vulnerability by sending a crafted
 HTTP request to the affected device. A successful exploit could
 allow the attacker to gain administrative access on the affected
 device.

According to its self-reported version, Cisco Data Center Network
Manager 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-20190626-dcnm-bypass
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?b938d05d");
  script_set_attribute(attribute:"see_also", value:"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvo64641");
  script_set_attribute(attribute:"solution", value:
"Upgrade to the relevant fixed version referenced in Cisco bug ID CSCvo64641");
  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:F/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:F/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-1619");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"exploit_framework_core", value:"true");
  script_set_attribute(attribute:"metasploit_name", value:'Cisco Data Center Network Manager Unauthenticated Remote Code Execution');
  script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");
  script_cwe_id(284);

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/06/26");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/06/26");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/07/12");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:cisco:data_center_network_manager");
  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) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("cisco_prime_dcnm_web_detect.nasl");
  script_require_keys("installed_sw/cisco_dcnm_web");
  script_require_ports("Services/www", 80);

  exit(0);
}

include("audit.inc");
include("global_settings.inc");
include("misc_func.inc");
include("http.inc");
include("install_func.inc");

appname = "Cisco Prime DCNM";
app_id  = "cisco_dcnm_web";
get_install_count(app_name:app_id, exit_if_zero:TRUE);

port = get_http_port(default:80);
install = get_single_install(app_name:app_id, port:port, exit_if_unknown_ver:TRUE);

url = build_url(qs:install['path'], port:port);
ver = install['version'];

match = pregmatch(string:ver, pattern:"^([0-9.]+)\(([^)]+)\)");
if (isnull(match)) exit(1, "Failed to parse the version ("+ver+").");

major = match[1];
build = match[2];

version = major + '.' + build;

# Version 11.0(1) is not vulnerable as stated in the advisory
if (major == '11.0' && build = '1') audit(AUDIT_WEB_APP_NOT_AFFECTED, appname, url, ver);

if (ver_compare(ver:version, fix:'11.1.1', strict:FALSE) < 0)
{

  report =
    '\n  URL               : ' + url +
    '\n  Installed version : ' + ver +
    '\n  Fixed version     : 11.1(1)' +
    '\n';
  security_report_v4(severity:SECURITY_HOLE, port:port, extra:report);
}

else audit(AUDIT_WEB_APP_NOT_AFFECTED, appname, url, ver);

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-20190626-dcnm-bypass.nasl
Windows:
C:\ProgramData\Tenable\Nessus\nessus\plugins\cisco-sa-20190626-dcnm-bypass.nasl
Mac OS X:
/Library/Nessus/run/lib/nessus/plugins/cisco-sa-20190626-dcnm-bypass.nasl

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How to Run

Here is how to run the Cisco Data Center Network Manager < 11.1(1) Authentication Bypass Vulnerability 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 Data Center Network Manager < 11.1(1) Authentication Bypass Vulnerability plugin ID 126643.
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-20190626-dcnm-bypass.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a cisco-sa-20190626-dcnm-bypass.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-20190626-dcnm-bypass.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-20190626-dcnm-bypass.nasl -t <IP/HOST>

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References

BID | SecurityFocus Bugtraq ID:

108902

IAVA | Information Assurance Vulnerability Alert:

2019-A-0221

Cisco Bug ID:

CSCvo64641

Cisco Security Advisory:

cisco-sa-20190626-dcnm-bypass

CWE | Common Weakness Enumeration:

CWE-284 (Weakness) Improper Access Control

See also:

Similar and related Nessus plugins:

126640 - Cisco Data Center Network Manager Arbitrary File Upload and Remote Code Execution Vulnerability
128685 - Cisco Data Center Network Manager Information Disclosure Vulnerability

Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file cisco-sa-20190626-dcnm-bypass.nasl version 1.7. For more plugins, visit the Nessus Plugin Library.

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Cisco Data Center Network Manager < 11.1(1) Authentication Bypass Vulnerability - Nessus

Plugin Overview

Vulnerability Information

Synopsis

Description

Solution

Public Exploits

Risk Information

Plugin Source

How to Run

References

Version

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