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Message-ID: <20050713213154.40141c66.aluigi@autistici.org> Date: Wed Jul 13 20:33:08 2005 From: aluigi at autistici.org (Luigi Auriemma) Subject: Endless loop in NetPanzer 0.8 ####################################################################### Luigi Auriemma Application: NetPanzer http://netpanzer.berlios.de Versions: <= 0.8 Platforms: Windows, Linux and Mac Bugs: endless loop Exploitation: remote, versus server (and clients also if useless) Date: 13 Jul 2005 Author: Luigi Auriemma e-mail: aluigi@...istici.org web: http://aluigi.altervista.org ####################################################################### 1) Introduction 2) Bug 3) The Code 4) Fix ####################################################################### =============== 1) Introduction =============== NetPanzer is an open source multiplayer tactical game enough known and played. ####################################################################### ====== 2) Bug ====== The network code doesn't verify the correctness of the 16 bit number containing the size of the entire data block received from the network. If an attacker sends the number 0x0000 (the minimum should be 0x0002) the game enters in an endless loop and nobody can play. ####################################################################### =========== 3) The Code =========== http://aluigi.altervista.org/poc/panzone.zip ####################################################################### ====== 4) Fix ====== The SVN version of the game has been fixed: http://developer.berlios.de/svn/?group_id=1250 ####################################################################### --- Luigi Auriemma http://aluigi.altervista.org
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