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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2.1 KiB
Text
60 lines
No EOL
2.1 KiB
Text
Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=942
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The DxgkDdiEscape handler for escape 0x100009a lacks proper bounds checks:
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case 0x100009A:
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...
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size_0 = escape_data->size_1;
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...
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size_1 = 2 - (escape_data->unknown < 18);
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...
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size_2 = escape_data->size_2;
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...
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total_size = size_0 * size_1 * size_2;
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...
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if (total_size > 0x10)
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do_debug_thingo();
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if (total_size) {
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DWORD* ptr = alloced_buf + 24;
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DWORD* user_buf = escape_data->data;
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...
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while (total_size) {
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*(ptr - 1) = *(user_buf - 1);
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*ptr = *user_buf;
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...
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user_buf += 4;
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ptr += 39;
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--total_size;
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}
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There is a check that total_size > 0x10, which calls some kind of a
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debug/logging function (do_debug_thingo in my pseudocode), but it does not
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actually stop processing of the escape. This leads to buffer overflow on the
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allocated pool buffer later on.
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Note that there is also a potential integer overflow in the calculation of
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|total_size|. Since the individual sizes (size_0, size_1, size_2) appear to be
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stored in a struct and eventually passed off to another function, there may be
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more problems later on too.
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Crashing context with PoC (Win10 x64 with 372.54):
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PAGE_FAULT_IN_NONPAGED_AREA (50)
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Invalid system memory was referenced. This cannot be protected by try-except.
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Typically the address is just plain bad or it is pointing at freed memory.
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...
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rax=00000000caa6ed30 rbx=0000000000000000 rcx=ffffc001cd337044
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rdx=00000000000f41bd rsi=0000000000000000 rdi=0000000000000000
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rip=fffff80102461188 rsp=ffffd000243bbed0 rbp=ffffd000243bbfd0
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r8=0000000000000000 r9=0000000000000000 r10=0000000000000000
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r11=0000000000000000 r12=0000000000000000 r13=0000000000000000
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r14=0000000000000000 r15=0000000000000000
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iopl=0 nv up ei pl nz na po nc
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nvlddmkm!nvDumpConfig+0x12a2b0:
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fffff801`02461188 8941fc mov dword ptr [rcx-4],eax ds:ffffc001`cd337040=????????
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Proof of Concept:
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https://github.com/offensive-security/exploitdb-bin-sploits/raw/master/bin-sploits/40665.zip |