NetPanzer 'frameNum' Error Lets Remote Users Deny Service
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SecurityTracker Alert ID: 1016149
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SecurityTracker URL: http://securitytracker.com/id?1016149
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CVE Reference: GENERIC-MAP-NOMATCH
(Links to External Site)
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Date: May 24 2006
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Impact: Denial of service via network
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Exploit Included: Yes
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Version(s): 0.8 (rev 952) and prior versions
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Description: Luigi Auriemma reported a vulnerability in NetPanzer. A remote user can cause denial of service conditions.
A remote user can send specially crafted data to the target game service to cause the service to crash.
The vulnerability resides
in 'src/Lib/2D/Surface.hpp' in the processing of the frameNum flag. A value greater than 41 can trigger the flaw.
A demonstration
exploit URL is provided:
http://aluigi.org/poc/panza.zip
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Impact: A remote user can cause denial of service conditions.
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Solution: No solution was available at the time of this entry.
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Vendor URL: www.netpanzer.org/ (Links to External Site)
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Cause: Input validation error
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Underlying OS: Linux (Any), UNIX (Any), Windows (Any)
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Reported By: Luigi Auriemma <aluigi@autistici.org>
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Message History:
None.
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Source Message Contents
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Date: Tue, 23 May 2006 19:17:46 +0200
From: Luigi Auriemma <aluigi@autistici.org>
Subject: Server termination in netPanzer 0.8 (rev 952)
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#######################################################################
Luigi Auriemma
Application: netPanzer
http://www.netpanzer.org
http://netpanzer.berlios.de
Versions: <= 0.8 (rev 952)
Platforms: *nix, *BSD, Windown, Mac and others
Bug: server termination
Exploitation: remote, versus server
Date: 23 May 2006
Author: Luigi Auriemma
e-mail: aluigi@autistici.org
web: aluigi.org
#######################################################################
1) Introduction
2) Bug
3) The Code
4) Fix
#######################################################################
===============
1) Introduction
===============
netPanzer is a nice and well known open source multiplayer strategy
game.
#######################################################################
======
2) Bug
======
The game is affected by a denial of service which happens when a client
uses a flag (called also frameNum) major than 41 since the setFrame
function in src/Lib/2D/Surface.hpp checks if this number is minor than
frameCount:
void setFrame(const float &frameNum)
{
assert(frameNum >= 0.0);
assert(frameNum < frameCount);
mem = frame0 + (pix.y * stride) * int(frameNum);
}
The result is the immediate interruption of the server:
netpanzer: src/Lib/2D/Surface.hpp:370: void Surface::setFrame(const
float&): Assertion `frameNum < frameCount' failed. Received signal
SIGABRT(6) aborting and trying to shutdown.
Closing logfile.
Aborted
#######################################################################
===========
3) The Code
===========
http://aluigi.org/poc/panza.zip
#######################################################################
======
4) Fix
======
No fix.
No reply from the developers.
#######################################################################
---
Luigi Auriemma
http://aluigi.org
http://mirror.aluigi.org
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