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Date: Wed, 04 Feb 2004 13:26:29 +0800
From: Leon Harris <>
To: Hilmi Ozdoganoglu <>
Subject: Re:

Interesting paper.
Certain apps (notably java virtual machines) manipulate stack return 
addresses. I understood that one of the advantages of Immunix's product 
StackGuard was that you could still run these types of apps by 
statically linking them against a normal libc (and chrooting them or 
otherwise confining them). If the protection is mandatory, and in 
hardware, then surely these types of app wont work.


Hilmi Ozdoganoglu wrote:

 >        SmashGuard is a hardware-based solution developed at Purdue
 >University  to prevent Buffer-Overflow Attacks realized by overwriting the
 >Function  Return Address (patent-pending).  The design of SmashGuard is a
 >kernel patch that supports CPUs modified to support SmashGuard protection.
 > For details please refer to the  TechReports at:
 >  In addition to details of SmashGuard, the site serves as a comprehensive
 >resource for buffer overflow attacks/prevention/detection. On "the buffer
 >overflow page" we provide links to research papers, known exploits, safer
 >C languages, patents, audit tools and more.  If you can think of a site or
 >resource that should be added please send email to our webmaster
 >-SmashGuard Group

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