full-disclosure - Buffer overflow in XFree86

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From: olaf.hahn at qsc.de (Olaf Hahn)
Subject: Buffer overflow in XFree86

At Feb-10-2004 iDefense has released a Security Advisory regarding to an 
buffer overflow in XFree86.
http://www.idefense.com/application/poi/display?id=72&type=vulnerabilities&flashstatus=false

According to this advisory affected versions are 4.1.0 to 4.3.0 and 
there?s an description how to reproduce the buffer overflow.

I?ve tried this (on a system running SuSe 8.2 and XFree86 version 4.2.0) 
but nothing happens unless a message appears

 >Fatal server error:
 >Server is already active for display 0
 >        If this server is no longer running, remove /tmp/.X0-lock
 >        and start again.

 >When reporting a problem related to a server crash, please send
 >the full server output, not just the last messages.
 >Please report problems to http://www.suse.de/feedback.

Can somebody reproduce this buffer overflow and under which conditions ?

-- 

Mit freundlichen Gr?ssen 

Olaf Hahn 
Datennetzdienste/Security 
QSC AG 

Mathias-Br?ggen-Str. 55 
50829 K?ln 
Phone: +49 221 6698-443 
Fax: +49 221 6698-409 
E-Mail: olaf.hahn@....de
Internet: http://www.qsc.de

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