Endless loop in Soldner 33724

2008.07.12
Risk: Medium
Local: No
Remote: Yes
CWE: CWE-399


CVSS Base Score: 7.8/10
Impact Subscore: 6.9/10
Exploitability Subscore: 10/10
Exploit range: Remote
Attack complexity: Low
Authentication: No required
Confidentiality impact: None
Integrity impact: None
Availability impact: Complete

####################################################################### Luigi Auriemma Application: SLDNER - Secret Wars http://www.secretwars.net http://soldner.jowood.com Versions: <= 33724 Platforms: Windows Bug: endless loop Exploitation: remote, versus server Date: 01 Jul 2008 Author: Luigi Auriemma e-mail: aluigi (at) autistici (dot) org [email concealed] web: aluigi.org ####################################################################### 1) Introduction 2) Bug 3) The Code 4) Fix ####################################################################### =============== 1) Introduction =============== SLDNER is a tactical military game developed by Wings Simulations and released in May 2004. ####################################################################### ====== 2) Bug ====== Each UDP packet for this game can contain various blocks of data. The type 0x80 forces the server to perform a cycle from zero to the 32 bit number (so max 0xffffffff) specified in that data block. The maximum size of a packet supported by the game is 1400 bytes in which is possible to place max 233 blocks of this type causing the freeze of a server for over 2 hours (tested with a fast CPU). ####################################################################### =========== 3) The Code =========== http://aluigi.org/poc/usurdat.zip ####################################################################### ====== 4) Fix ====== No fix ####################################################################### --- Luigi Auriemma http://aluigi.org

References:

http://www.securityfocus.com/archive/1/archive/1/493810/100/0/threaded
http://secunia.com/advisories/30880
http://aluigi.altervista.org/adv/usurdat-adv.txt


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