exploit the possibilities

zonealarmDriver.txt

zonealarmDriver.txt
Posted Aug 5, 2003
Authored by Lord Yup | Site sec-labs.hack.pl

ZoneAlarm is vulnerable to a buffer overflow in its device driver VSDATANT that can allow for code execution with escalated privileges.

tags | advisory, overflow, code execution
SHA-256 | 820b1f247faa010ab3db72480902ac763d30b08bf5e79008ff372f7dbf442eec

zonealarmDriver.txt

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sec-labs team proudly presents:


Local ZoneAlarm Firewall (probably all versions - tested on v3.1)

Device Driver vulnerability.
by Lord YuP
04/08/2003




I. BACKGROUND


ZoneAlarm is a very powerful and very common nowadays firewall for

Windows produced by Zone Labs. (http://www.zonelabs.com)




II. DESCRIPTION


The driver installed with ZoneAlarm is vulnerable, and can be
exploited in cause of that attacker can gain full system control
(ring0 privileges).


By sending properly formatted message to the ZoneAlarm Device
Driver (VSDATANT - TrueVector Device Driver) you can cause an
device driver memory overwrite.

Overview, sending faked buffors with specific singal can cause
a miscellaneous code execution:


First signal should be send to overwrite specific memory location,

in the current case it can be one of the case-if-statement.


push 0 ;overlapped
push offset bytes_returned ;bytes returned
push 4 ;lpOutBuffer size
push STATMENT_INSTRUCTION_POINTER ;memory to overwrite
push 0 ;lpInBuffer size
push 0 ;lpInBuffer
push 8400000fh ;guess what X-D
push vsdatant_handle ;device handle
call DeviceIoControl ;send it!



If the correct STATMENT_INSTRUCTION_POINTER will be put the address

should be overwritten to 00060001h (example). After memory
allocation at this address (inserting shellcode bla bla bla), the

second signal must be send to jump into inserted code. That can
be done with sending another signal:



LpInBuffer:
db STATMENT_OVERWRITTEN_NUMBER ;where to jump
db 7 dup (0) ;data?
dd temp_buff ;temp buffer
db 10 dup (0) ;some space


This one should be send with another dwIoControl code, however we

are no longer publishing any exploits, even PoC (die kiddies)


After sending second faked message, device driver will jump
to the STATEMENT offset which was overwritten by first "signal"



III. IMPACT


The after sucessfull exploitation, attacker can obtain FULL SYSTEM

CONTROL! In the worse for attacker option, OS can fault!



IV. REFERENCE - DEVICE DRIVER ATTACKS


The white paper about Device Drivers Attacks can be found at
http://sec-labs.hack.pl the papers section.




- --
sec-labs team [http://sec-labs.hack.pl]

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