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)
48 lines
No EOL
1.9 KiB
Text
48 lines
No EOL
1.9 KiB
Text
Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=927
|
|
|
|
The DxgkDdiEscape handler for escape code 0x100010b looks like:
|
|
|
|
char escape_100010b(NvMiniportDeviceContext *miniport_context, HANDLE handle, unsigned int idx)
|
|
{
|
|
PVOID *Object;
|
|
if ( !handle )
|
|
do_debug_thingo();
|
|
Object = (PVOID *)&miniport_context->UNKNOWN[8 * idx + 22696];
|
|
if ( !ObReferenceObjectByHandle(handle_, SYNCHRONIZE, )ExEventObjectType, UserMode, Object, 0i64) )
|
|
{
|
|
result = 0;
|
|
if ( *Object )
|
|
result = UserMode;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
It essentially takes in a user mode event handle from userspace, and calls
|
|
ObReferenceObjectByHandle on it, writing the object pointer to |Object|. Note
|
|
that the kernel implementation of ObReferenceObjectByHandle always begins with
|
|
writing NULL to this pointer regardless of whether or not the handle is valid.
|
|
|
|
|Object| is calculated using a user provided index that is not bounds checked,
|
|
leading to OOB write of either NULL or the KEVENT pointer:
|
|
|
|
Object = (PVOID *)&miniport_context_->UNKNOWN[8 * idx + 22696];
|
|
|
|
The attached PoC causes the following crashing context on Win x64 372.54:
|
|
|
|
PAGE_FAULT_IN_NONPAGED_AREA (50)
|
|
...
|
|
rax=ffffe0025ea28f50 rbx=0000000000000000 rcx=0000000000000000
|
|
rdx=0000000000100000 rsi=0000000000000000 rdi=0000000000000000
|
|
rip=fffff801d8f3daf5 rsp=ffffd000203deda0 rbp=0000000000000001
|
|
r8=ffffe000506d4b50 r9=ffffe000524fb201 r10=0000000000000000
|
|
r11=ffffd000203df370 r12=0000000000000000 r13=0000000000000000
|
|
r14=0000000000000000 r15=0000000000000000
|
|
iopl=0 nv up ei pl zr na po nc
|
|
nt!ObReferenceObjectByHandleWithTag+0x45:
|
|
fffff801`d8f3daf5 488908 mov qword ptr [rax],rcx ds:ffffe002`5ea28f50=????????????????
|
|
|
|
To reproduce, compile as a x64 executable and run (requires WDK for D3DKMTEscape).
|
|
|
|
|
|
Proof of Concept:
|
|
https://github.com/offensive-security/exploitdb-bin-sploits/raw/master/bin-sploits/40661.zip |