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Files from Yorick Koster

Real NameYorick Koster
Email addressprivate
Websitenl.linkedin.com/in/yorickkoster
First Active2009-07-17
Last Active2020-09-30
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Seagate Media Server Arbitrary File / Folder Deletion
Posted Jan 15, 2018
Authored by Yorick Koster, Securify B.V.

Seagate Media Server on a Seagate Personal Cloud model SRN21C running firmware version 4.3.16.0 suffers from an unauthenticated arbitrary file and folder deletion vulnerability.

tags | exploit, arbitrary
SHA-256 | f3f389a36fe31dac25043a5e92d7942a029fddff9e00419ed4f652efc9e5e14c
pfSense 2.4.1 CSRF Error Page Clickjacking
Posted Dec 13, 2017
Authored by Yorick Koster | Site metasploit.com

This Metasploit module exploits a Clickjacking vulnerability in pfSense versions 2.4.1 and below. pfSense is a free and open source firewall and router. It was found that the pfSense WebGUI is vulnerable to Clickjacking. By tricking an authenticated admin into interacting with a specially crafted webpage it is possible for an attacker to execute arbitrary code in the WebGUI. Since the WebGUI runs as the root user, this will result in a full compromise of the pfSense instance.

tags | exploit, arbitrary, root
SHA-256 | d1034b0f46efb18bcec5b48f5aea0d3d693eeb2861362d95cc694e2c5acf247f
Microsoft Windows LNK File Code Execution
Posted Nov 8, 2017
Authored by Yorick Koster, Spencer McIntyre | Site metasploit.com

This Metasploit module exploits a vulnerability in the handling of Windows Shortcut files (.LNK) that contain a dynamic icon, loaded from a malicious DLL. This vulnerability is a variant of MS15-020 (CVE-2015-0096). The created LNK file is similar except an additional SpecialFolderDataBlock is included. The folder ID set in this SpecialFolderDataBlock is set to the Control Panel. This is enough to bypass the CPL whitelist. This bypass can be used to trick Windows into loading an arbitrary DLL file. The PATH option must be an absolute path to a writeable directory which is indexed for searching. If no PATH is specified, the module defaults to %USERPROFILE%.

tags | exploit, arbitrary
systems | windows
advisories | CVE-2015-0095, CVE-2017-8464
SHA-256 | 81346e7020afd7e94a6d9b253a4b2b5b1c2eba12306e57cf746fb11c43f51e4b
Xamarin Studio For Mac 6.2.1 (Build 3) / 6.3 (Build 863) Privilege Escalation
Posted Aug 14, 2017
Authored by Yorick Koster, Securify B.V.

Xamarin Studio for Mac versions 6.2.1 (build 3) and 6.3 (build 863) suffer from a local privilege escalation vulnerability.

tags | exploit, local
SHA-256 | a2f41032628fcb3233d26bea6d30e9def54faf5fca09f48714b2342e3c33ceb0
Microsoft Windows LNK Shortcut File Code Execution
Posted Aug 1, 2017
Authored by Yorick Koster | Site metasploit.com

This Metasploit module exploits a vulnerability in the handling of Windows Shortcut files (.LNK) that contain a dynamic icon, loaded from a malicious DLL. This vulnerability is a variant of MS15-020 (CVE-2015-0096). The created LNK file is similar except in an additional SpecialFolderDataBlock is included. The folder ID set in this SpecialFolderDataBlock is set to the Control Panel. This is enough to bypass the CPL whitelist. This bypass can be used to trick Windows into loading an arbitrary DLL file.

tags | exploit, arbitrary
systems | windows
advisories | CVE-2017-8464
SHA-256 | 63ff862692b9e1b52aec2b632659c94e
InsomniaX 2.1.8 Arbitrary Kernel Extension Loading
Posted Jul 3, 2017
Authored by Yorick Koster

It was found that the loader application bundled with InsomniaX can be used to load arbitrary Kernel Extensions (kext). The loader is normally used to load a kext file that is needed to disable the Lid Sleep. A flaw has been found in the loader that allows a local attacker to load (or unload) any arbitrary kext file. Version 2.1.8 is affected.

tags | exploit, arbitrary, kernel, local
SHA-256 | f28199946230e4daa1642242d33d9ca9f4e85aea826651a5cc95372e3d523473
MediaWiki SyntaxHighlight Extension Option Injection
Posted May 20, 2017
Authored by Yorick Koster | Site metasploit.com

This Metasploit module exploits an option injection vulnerability in the SyntaxHighlight extension of MediaWiki. It tries to create and execute a PHP file in the document root. The USERNAME and PASSWORD options are only needed if the Wiki is configured as private. This vulnerability affects any MediaWiki installation with SyntaxHighlight version 2.0 installed and enabled. This extension ships with the AIO package of MediaWiki version 1.27.x and 1.28.x. A fix for this issue is included in MediaWiki version 1.28.2 and version 1.27.3.

tags | exploit, root, php
advisories | CVE-2017-0372
SHA-256 | 42e48276927339958a36dbb2f1b6e10a0ccdc795bdf63b73b3596ebd982b5dac
SyntaxHighlight 2.0 MediaWiki 1.28.0 Stored Cross Site Scripting
Posted Apr 29, 2017
Authored by Yorick Koster, Securify B.V.

A vulnerability was found in the SyntaxHighlight MediaWiki extension. Using this vulnerability it is possible for an anonymous attacker to pass arbitrary options to the Pygments library. By specifying specially crafted options, it is possible for an attacker to trigger a (stored) cross site scripting condition. In addition, it allows the creating of arbitrary files containing user-controllable data. Depending on the server configuration, this can be used by an anonymous attacker to execute arbitrary PHP code. This issue was tested on SyntaxHighlight version 2.0 as bundled with MediaWiki version 1.28.0.

tags | exploit, arbitrary, php, xss
advisories | CVE-2017-0372
SHA-256 | 50546f158305a6607d2ea38624dad8d3ab66ba8a94154dea7e2eb2e025f51253
WordPress Connection Information Cross Site Request Forgery
Posted Apr 20, 2017
Authored by Yorick Koster, Securify B.V.

The FTP/SSH form functionality of WordPress was found to be vulnerable to cross site request forgery. WordPress versions 4.5.3 through 4.7.4 are affected.

tags | exploit, csrf
SHA-256 | b97c1f2af9252a37cfcaefbd0f9425ff1c4e40ba1332f9a406279cdaac8df4db
Microsoft Office OneNote 2007 DLL Hijacking
Posted Apr 11, 2017
Authored by Yorick Koster, Securify B.V.

Microsoft Office OneNote 2007 suffers from a dll hijacking vulnerability.

tags | exploit
systems | windows
SHA-256 | 92ffa7b1c72b8b00b7d451ccb6b8cdfe74e1354ccb747dd69a8f8d17fd7b77bf
WordPress 4.5.3 Audio Playlist Cross Site Scripting
Posted Mar 7, 2017
Authored by Yorick Koster, Securify B.V.

WordPress version 4.5.3 Audio Playlist suffers from a cross site scripting vulnerability.

tags | exploit, xss
SHA-256 | 5cc091745546ab8480da313fab64c7a103eba0bafc790d9e14a9171c0134e222
WordPress Google Analytics Dashboard 2.1.1 Cross Site Scripting
Posted Mar 3, 2017
Authored by Yorick Koster, Securify B.V.

WordPress Google Analytics Dashboard plugin version 2.1.1 suffers from a cross site scripting vulnerability.

tags | exploit, xss
SHA-256 | bc9ec119f0a226470311e249f41eb959a98b3b4353374203f0b337db3a302b54
WordPress Simple Ads Manager 2.9.8.125 PHP Object Injection
Posted Mar 3, 2017
Authored by Yorick Koster, Securify B.V.

WordPress Simple Ads Manager plugin version 2.9.8.125 suffers from a PHP object injection vulnerability.

tags | exploit, php
SHA-256 | ec6251fd0911f4668303757918ecfa10fdca19a8702e8709cfa291d4df22cd8b
WordPress Global Content Blocks 2.1.5 Cross Site Request Forgery
Posted Mar 3, 2017
Authored by Yorick Koster, Securify B.V.

WordPress Global Content Blocks plugin version 2.1.5 suffers from a cross site request forgery vulnerability.

tags | exploit, csrf
SHA-256 | 0f2b9abeb8b770a6bc6a9870916904a2c4d2bfff9701bd7c0c0df561111e1a69
WordPress Trust Form 2.0 Cross Site Scripting
Posted Mar 1, 2017
Authored by Yorick Koster, Securify B.V.

WordPress Trust Form plugin version 2.0 suffers from a cross site scripting vulnerability.

tags | exploit, xss
SHA-256 | f0520b62eba5142812d52e24b0842400be91238307a22751b2fc0270207501f7
WordPress Analytics Stats Counter Statistics 1.2.2.5 PHP Object Injection
Posted Mar 1, 2017
Authored by Yorick Koster, Securify B.V.

WordPress Analytics Stats Counter Statistics plugin version 1.2.2.5 suffers from a PHP object injection vulnerability.

tags | advisory, php
SHA-256 | d1935f94c13d237a769e00666940587d42964a0f386dbc6ac59063ea3b38e413
WordPress WP-Filebase Download Manager 3.4.4 Cross Site Scripting
Posted Mar 1, 2017
Authored by Yorick Koster, Securify B.V.

WordPress WP-Filebase Download Manager plugin version 3.4.4 suffers from a cross site scripting vulnerability.

tags | exploit, xss
SHA-256 | 979fbbeecfa00a214223f001ac5c8d271726113e0cf0f2b7d1d6a1a6d7cb5942
WordPress InfiniteWP Client 1.5.1.3 / 1.6.0 PHP Object Injection
Posted Jan 25, 2017
Authored by Yorick Koster, Securify B.V.

WordPress InfiniteWP Client plugin versions 1.5.1.3 and 1.6.0 suffer from a PHP object injection vulnerability.

tags | advisory, php
SHA-256 | 74ff5245b2d5c61d42d72ec48e5ef102ec8f33a14a671e780a71faac3de023c7
WordPress CMS Commander Client 2.21 PHP Object Injection
Posted Jan 25, 2017
Authored by Yorick Koster, Securify B.V.

WordPress CMS Command Client plugin version 2.21 suffer from a PHP object injection vulnerability.

tags | advisory, php
SHA-256 | 7625040df4e8cd693c4e1f946eb49f919e552143bf24eb14f8dfd937809d5dd3
WordPress Google Forms 0.87 PHP Object Injection
Posted Jan 25, 2017
Authored by Yorick Koster, Securify B.V.

WordPress Google Forms plugin versions 0.8 through 0.87 suffer from a PHP object injection vulnerability.

tags | advisory, php
SHA-256 | ae94630680f1e42c5eeb8f1edcd5f27fe6bcea14d0a2979fd4b00f7a0817a4a2
WordPress Insert Html Snippet 1.2 Cross Site Request Forgery
Posted Nov 29, 2016
Authored by Yorick Koster, Securify B.V.

WordPress Insert Html Snippet plugin version 1.2 suffers from a cross site request forgery vulnerability.

tags | exploit, csrf
SHA-256 | 88cdb0cc08fc0716a77ecedb0dcebc1babd0f1b3b9aff65d890c24afc0b2ffb3
WordPress Canvas - Shortcodes 1.92 Cross Site Scripting
Posted Nov 20, 2016
Authored by Yorick Koster, Securify B.V.

WordPress Canvas - Shortcodes plugin version 1.92 suffers from a persistent cross site scripting vulnerability.

tags | exploit, xss
SHA-256 | df2444b47f4a472964932e55ac22ed373bde66c7f0329b98e3a724aa42845768
WordPress All In One WP Security And Firewall 4.1.9 Cross Site Scripting
Posted Nov 16, 2016
Authored by Yorick Koster

WordPress All In One WP Security and Firewall plugin versions 4.1.4 through 4.1.9 suffer from a cross site scripting vulnerability.

tags | exploit, xss
SHA-256 | 529e84cd77541f83b0ed65669edd6479516fab6293f7fc579a4115aa74f2d889
Office OLE DLL Hijacking
Posted Nov 10, 2016
Authored by Yorick Koster | Site metasploit.com

Multiple DLL side loading vulnerabilities were found in various COM components. These issues can be exploited by loading various these components as an embedded OLE object. When instantiating a vulnerable object Windows will try to load one or more DLLs from the current working directory. If an attacker convinces the victim to open a specially crafted (Office) document from a directory also containing the attacker's DLL file, it is possible to execute arbitrary code with the privileges of the target user. This can potentially result in the attacker taking complete control of the affected system.

tags | exploit, arbitrary, vulnerability
systems | windows
advisories | CVE-2015-6128, CVE-2015-6132, CVE-2015-6133, CVE-2016-0041, CVE-2016-0100, CVE-2016-3235
SHA-256 | 54a85ca989c4eaff178f934a3bf1f889b5563dba98e78c59197f8309e65b7406
WordPress Quotes Collection 2.0.5 Cross Site Scripting
Posted Nov 8, 2016
Authored by Yorick Koster, Securify B.V.

WordPress Quotes Collection plugin version 2.0.5 suffers from a cross site scripting vulnerability.

tags | exploit, xss
SHA-256 | 3e714101167947eb893acf037ef84d9ed96b9fc784119af58b4e11c5506a768a
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