ManageEngine ADSelfServicePlus Authentication Bypass (CVE-2021-40539) - Nessus

Critical   Plugin ID: 154964

This page contains detailed information about the ManageEngine ADSelfServicePlus Authentication Bypass (CVE-2021-40539) Nessus plugin including available exploits and PoCs found on GitHub, in Metasploit or Exploit-DB for verifying of this vulnerability.

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Plugin Overview

ID: 154964
Name: ManageEngine ADSelfServicePlus Authentication Bypass (CVE-2021-40539)
Filename: manageengine_adselfservice_plus_CVE-2021-40539.nbin
Vulnerability Published: 2021-09-07
This Plugin Published: 2021-11-08
Last Modification Time: 2022-05-03
Plugin Version: 1.14
Plugin Type: remote
Plugin Family: CGI abuses
Dependencies: manageengine_adselfservice_detect.nasl
Required KB Items [?]: installed_sw/ManageEngine ADSelfService Plus

Vulnerability Information

Severity: Critical
Vulnerability Published: 2021-09-07
Patch Published: 2021-09-07
CVE [?]: CVE-2021-40539
CPE [?]: cpe:/a:zohocorp:manageengine_adselfservice_plus

Synopsis

An Active Directory password management and single-sign on solution application running on the remote host is affected by an authentication bypass vulnerability.

Description

The Zoho ManageEngine ADSelfService Plus running on the remote host is affected by an authentication bypass vulnerability in the REST API which can lead to remote code execution.

Solution

Upgrade to ADSelfService Plus build 6113 or later.

Public Exploits

Target Network Port(s): 8888
Target Asset(s): Services/www
Exploit Available: True (Metasploit Framework, GitHub)
Exploit Ease: Exploits are available

Here's the list of publicly known exploits and PoCs for verifying the ManageEngine ADSelfServicePlus Authentication Bypass (CVE-2021-40539) vulnerability:

  1. Metasploit: exploit/windows/http/manageengine_adselfservice_plus_cve_2021_40539
    [ManageEngine ADSelfService Plus CVE-2021-40539]
  2. GitHub: https://github.com/Mr-xn/Penetration_Testing_POC
    [CVE-2021-40539]
  3. GitHub: https://github.com/r0eXpeR/supplier
    [CVE-2021-40539]
  4. GitHub: https://github.com/DarkSprings/CVE-2021-40539
    [CVE-2021-40539: CVE-2021-40539 POC]
  5. GitHub: https://github.com/synacktiv/CVE-2021-40539
    [CVE-2021-40539: Exploitation code for CVE-2021-40539]

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-2021-40539
CVSS V2 Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P/E:H/RL:OF/RC:C
CVSS Base Score:7.5 (High)
Impact Subscore:6.4
Exploitability Subscore:10.0
CVSS Temporal Score:6.5 (Medium)
CVSS Environmental Score:NA (None)
Modified Impact Subscore:NA
Overall CVSS Score:6.5 (Medium)
CVSS V3 Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C
CVSS Base Score:9.8 (Critical)
Impact Subscore:5.9
Exploitability Subscore:3.9
CVSS Temporal Score:9.4 (Critical)
CVSS Environmental Score:NA (None)
Modified Impact Subscore:NA
Overall CVSS Score:9.4 (Critical)
STIG Severity [?]: I
STIG Risk Rating: High

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Plugin Source

The manageengine_adselfservice_plus_CVE-2021-40539.nbin Nessus plugin is distributed in a propriatory binary format and its source code is protected. This script is Copyright (C) 2021-2022 and is owned by Tenable, Inc. or an Affiliate thereof.

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

  • Linux / Unix:
    /opt/nessus/lib/nessus/plugins/manageengine_adselfservice_plus_CVE-2021-40539.nbin
  • Windows:
    C:\ProgramData\Tenable\Nessus\nessus\plugins\manageengine_adselfservice_plus_CVE-2021-40539.nbin
  • Mac OS X:
    /Library/Nessus/run/lib/nessus/plugins/manageengine_adselfservice_plus_CVE-2021-40539.nbin

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How to Run

Here is how to run the ManageEngine ADSelfServicePlus Authentication Bypass (CVE-2021-40539) as a standalone plugin via the Nessus web user interface (https://localhost:8834/):

  1. Click to start a New Scan.
  2. Select Advanced Scan.
  3. Navigate to the Plugins tab.
  4. On the top right corner click to Disable All plugins.
  5. On the left side table select CGI abuses plugin family.
  6. On the right side table select ManageEngine ADSelfServicePlus Authentication Bypass (CVE-2021-40539) plugin ID 154964.
  7. Specify the target on the Settings tab and click to Save the scan.
  8. 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 manageengine_adselfservice_plus_CVE-2021-40539.nbin -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a manageengine_adselfservice_plus_CVE-2021-40539.nbin -t <IP/HOST>

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

/opt/nessus/bin/nasl -T - manageengine_adselfservice_plus_CVE-2021-40539.nbin -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 manageengine_adselfservice_plus_CVE-2021-40539.nbin -t <IP/HOST>

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References

IAVA | Information Assurance Vulnerability Alert:
  • 2021-A-0561
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Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file manageengine_adselfservice_plus_CVE-2021-40539.nbin version 1.14. For more plugins, visit the Nessus Plugin Library.

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