####################################################################### 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: [EMAIL PROTECTED] 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 _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/