GMM

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GMM - Guarded Memory Move

The Guarded Memory Move tool is useful for studying buffer overflows and catching them together with a "good" stack image. Once a stack overflow has been exploited, the back trace is already gone, as is information about parameters and local variables that are very important in understanding how the attacker is working out the exploit.

The GMM library uses dynamic function call interception to catch the most common functions that attackers use to exploit stack buffers. It uses the LD_PRELOAD capability and offers two services: first, it avoids buffer overflow to allow the attacker to execute shell-code on your machine. Second, where an exploit is detected, it saves the stack content and triggers a segmentation fault. The resulting core dump has the necessary information to debug the exploit and fix the software.

Obtaining

Web page http://www.xmailserver.org/gmm.html
Source tarball http://www.xmailserver.org/gmm-0.4.tar.gz
Version 0.4 (beta) released on 2004-01-27

Licensed under The GNU General Public License, Version 2 or later.

This is not a GNU package.

Documentation

User reference in PDF from http://www.xmailserver.org/gmm.pdf

Support contacts

Project contacts

Maintainers	Davide Libenzi <[email protected]>
Developers	Davide Libenzi <[email protected]>

Related information

Interfaces	library
Source languages	C
Use requirements	glibc
Build prerequisites	gcc
Related programs	libsafe

Entry information

License verified by	Janet Casey <[email protected]> on 2004-01-27
Entry compiled by	Davide Libenzi <[email protected]>

Categories

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Permission is granted to copy, distribute, and/or modify this document under the terms of the GNU Free Documentation License, Version 1.1 or any later version published by the Free Software Foundation; with no Invariant Sections, with no Front-Cover Texts, and with no Back-Cover Texts. A copy of this license is included in the file COPYING.DOC.

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