mailing list archives
silly little Explorer XP DoS
From: Peter Ferrie <pferrie () symantec com>
Date: Mon, 15 Mar 2004 13:40:59 -0800
Background: Windows Explorer for Windows XP will automatically parse
.WMF files for validity when browsing the directory that contains them.
No need to click on anything at all.
Bug: GDI32!SetMetaFileBitsEx (which does the parsing) does not check
for records of zero length, resulting in an infinite loop when one is
encountered, and making the system very slow.
Demo: can be done in 24 bytes. Very silly.
Full-Disclosure - We believe in it.
- silly little Explorer XP DoS Peter Ferrie (Mar 15)