ed0e1e4d44
1979 changes to exploits/shellcodes Couchdb 1.5.0 - 'uuids' Denial of Service Apache CouchDB 1.5.0 - 'uuids' Denial of Service Beyond Remote 2.2.5.3 - Denial of Service (PoC) udisks2 2.8.0 - Denial of Service (PoC) Termite 3.4 - Denial of Service (PoC) SoftX FTP Client 3.3 - Denial of Service (PoC) Silverstripe 2.3.5 - Cross-Site Request Forgery / Open redirection SilverStripe CMS 2.3.5 - Cross-Site Request Forgery / Open Redirection Silverstripe CMS 3.0.2 - Multiple Vulnerabilities SilverStripe CMS 3.0.2 - Multiple Vulnerabilities Silverstripe CMS 2.4 - File Renaming Security Bypass SilverStripe CMS 2.4 - File Renaming Security Bypass Silverstripe CMS 2.4.5 - Multiple Cross-Site Scripting Vulnerabilities SilverStripe CMS 2.4.5 - Multiple Cross-Site Scripting Vulnerabilities Silverstripe CMS 2.4.7 - 'install.php' PHP Code Injection SilverStripe CMS 2.4.7 - 'install.php' PHP Code Injection Silverstripe Pixlr Image Editor - 'upload.php' Arbitrary File Upload SilverStripe CMS Pixlr Image Editor - 'upload.php' Arbitrary File Upload Silverstripe CMS 2.4.x - 'BackURL' Open Redirection SilverStripe CMS 2.4.x - 'BackURL' Open Redirection Silverstripe CMS - 'MemberLoginForm.php' Information Disclosure SilverStripe CMS - 'MemberLoginForm.php' Information Disclosure Silverstripe CMS - Multiple HTML Injection Vulnerabilities SilverStripe CMS - Multiple HTML Injection Vulnerabilities Apache CouchDB 1.7.0 and 2.x before 2.1.1 - Remote Privilege Escalation Apache CouchDB 1.7.0 / 2.x < 2.1.1 - Remote Privilege Escalation Monstra CMS before 3.0.4 - Cross-Site Scripting Monstra CMS < 3.0.4 - Cross-Site Scripting (2) Monstra CMS < 3.0.4 - Cross-Site Scripting Monstra CMS < 3.0.4 - Cross-Site Scripting (1) Navigate CMS 2.8 - Cross-Site Scripting Collectric CMU 1.0 - 'lang' SQL injection Joomla! Component CW Article Attachments 1.0.6 - 'id' SQL Injection LG SuperSign EZ CMS 2.5 - Remote Code Execution MyBB Visual Editor 1.8.18 - Cross-Site Scripting Joomla! Component AMGallery 1.2.3 - 'filter_category_id' SQL Injection Joomla! Component Micro Deal Factory 2.4.0 - 'id' SQL Injection RICOH Aficio MP 301 Printer - Cross-Site Scripting Joomla! Component Auction Factory 4.5.5 - 'filter_order' SQL Injection RICOH MP C6003 Printer - Cross-Site Scripting Linux/ARM - Egghunter (PWN!) + execve(_/bin/sh__ NULL_ NULL) Shellcode (28 Bytes) Linux/ARM - sigaction() Based Egghunter (PWN!) + execve(_/bin/sh__ NULL_ NULL) Shellcode (52 Bytes)
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2.6 KiB
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34 lines
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2.6 KiB
Text
Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=1328
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Windows: WLDP/MSHTML CLSID UMCI Bypass
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Platform: Windows 10 S (thought should be anything with UMCI)
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Class: Security Feature Bypass
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Summary:
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The enlightened lockdown policy check for COM Class instantiation can be bypassed in MSHTML hosts leading to arbitrary code execution on a system with UMCI enabled (e.g. Device Guard)
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Description:
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Scripting hosts are supposed to check against the Windows Lockdown Policy (WLDP) before instantiating arbitrary COM classes. This is typically done by calling WldpIsClassInApprovedList from WLDP.DLL before instantiating any COM class. For example in the case of JScript’s ActiveXObject the ProgID is passed to CLSIDFromProgID by the script host and the resulting CLSID is passed to WLDP to determine what’s allowed.
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It’s possible to circumvent this check by using the COM TreatAs key to redirect one of the limited (8) allowed CLSIDs to an arbitrary class and get it instantiated. However you can’t do this using ActiveXObject as CLSIDFromProgID will return the resulting CLSID from looking up TreatAs. That said there is a race condition here. However in an MSHTML Local Machine Zone scenario you can bypass it by using an OBJECT tag. In this case MSHTML parses the classid attribute and checks that CLSID against WLDP. It then proceeds to create it using CoCreateInstance which follows TreatAs and creates a different object.
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This does require modification of the registry to work, but I think that’s in scope. The reason I’m reporting this one is I think it’s a bug in MSHTML, rather than in an application you can easily block (at least if you want to disable
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Proof of Concept:
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I’ve provided a PoC is two files, a text file to set-up the registry and a HTML file. The registry file is in the REGINI format which allows it to work on Win10S as while reg.exe and regedit.exe are blocked regini.exe isn’t. The HTML file can be run inside IE or my prefered option HTML Help. You could even make the PoC file a CHM but I didn’t. The PoC can bootstrap things like untrusted .NET but for simplicity it doesn’t.
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1) Unpack the PoC and ensure the HTML file does NOT have MOTW.
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2) From the explorer Run dialog execute “regini path\to\keys.txt”
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3) Execute the HTML file from the Run dialog using “hh path\to\shell.html”
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Expected Result:
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The class creation should fail.
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Observed Result:
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The class creation succeeded and the HTML file executed notepad.
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Proof of Concept:
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https://github.com/offensive-security/exploitdb-bin-sploits/raw/master/bin-sploits/42997.zip |