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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Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=1261
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A detailed introduction to MsMpEng can be found in issue #1252 , so I will skip the background story here.
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Through fuzzing, we have discovered a number of ways to crash the service (and specifically code in the mpengine.dll module), by feeding it with malformed input testcases to scan. A summary of our findings is shown in the table below:
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+==============+===================================+==========================+=============+====================================================+=============================================+
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| Name | Type | Requirements | Access Type | Observed symbol | Comments |
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+==============+===================================+==========================+=============+====================================================+=============================================+
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| corruption_1 | Heap buffer overflow | PageHeap for MpMsEng.exe | - | free() called by NET_thread_ctx_t__FreeState_void_ | One-byte overflow. |
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+--------------+-----------------------------------+--------------------------+-------------+----------------------------------------------------+---------------------------------------------+
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| corruption_2 | Heap corruption | PageHeap for MpMsEng.exe | - | free() called by CRsaPublicKey__Decrypt_uchar | May crash in other ways, e.g. invalid read. |
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+--------------+-----------------------------------+--------------------------+-------------+----------------------------------------------------+---------------------------------------------+
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| corruption_3 | Unspecified memory corruption (?) | - | - | netvm_parse_routine_netinvoke_handle_t | Different crashes with/out PageHeap. |
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+--------------+-----------------------------------+--------------------------+-------------+----------------------------------------------------+---------------------------------------------+
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| null_1 | NULL Pointer Dereference | - | READ | nUFSP_pdf__handleXFA_PDF_Value | |
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+--------------+-----------------------------------+--------------------------+-------------+----------------------------------------------------+---------------------------------------------+
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| null_2 | NULL Pointer Dereference | - | READ | nUFSP_pdf__expandObjectStreams_void | |
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+--------------+-----------------------------------+--------------------------+-------------+----------------------------------------------------+---------------------------------------------+
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| null_3 | NULL Pointer Dereference | - | READ | NET_context_unsigned | |
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+--------------+-----------------------------------+--------------------------+-------------+----------------------------------------------------+---------------------------------------------+
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| null_4 | NULL Pointer Dereference | - | READ | nUFSP_pdf__expandObjectStreams_void_ | Similar to null_2, may be the same bug. |
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+--------------+-----------------------------------+--------------------------+-------------+----------------------------------------------------+---------------------------------------------+
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| div_by_zero | Division by zero | - | - | x86_code_cost__get_cost_int | |
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+--------------+-----------------------------------+--------------------------+-------------+----------------------------------------------------+---------------------------------------------+
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| recursion | Deep/infinite recursion | - | - | __EH_prolog3_catch_GS | |
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+--------------+-----------------------------------+--------------------------+-------------+----------------------------------------------------+---------------------------------------------+
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The "corruption_1-3" issues are the most important ones, as they represent memory corruption problems and could potentially lead to execution of arbitrary code. On the other hand, "null_1-4", "div_by_zero" and "recursion" are low severity bugs that can only be used to bring the service process down. We have verified that all listed crashes occur on Windows 7 as soon as an offending sample is saved to disk and discovered by MsMpEng. For "corruption_1-2", the PageHeap mechanism must be enabled for the MsMpEng.exe program in order to reliably observe the unhandled exception.
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Attached is a ZIP archive (password: "mpengbugs") with up to 3 testcases for each of the 9 unique crashes.
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Proof of Concept:
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https://github.com/offensive-security/exploitdb-bin-sploits/raw/master/bin-sploits/42081.zip |