Cache Disclosure Leads to MYCOMPUTER Zone and Remote Compromise



[tested]

OS:WinXp, CN version

Microsoft Internet Explorer v6.Sp1; up-to-date on 2003/11/16



[overview]

By combining cache file disclosure and several other unpatched vulnerabilties, an malicious INTERNET page can reach MYCOMPUTER zone. The demo uses Adodb.Stream to launch a remote compromise attack.



[demo]

There are two harmless demos:

Online demo, powered by ASP:

http://www.safecenter.net/UMBRELLAWEBV4/LocalZoneInCache/Loc alZoneInCache-Demo/index.html

(runs harmless demonstration executable)



[technical details]

First, place an HTML file in IE cache directory and get its location.

(Liu Die Yu's http://www.safecenter.net/UMBRELLAWEBV4/threadid10008/index.htm l)

Second, this HTML file can be parsed as an HTML page and treated as in MYCOMPUTER security zone.

(Mindwarper of mlsecurity.com's http://www.mlsecurity.com/ie/ie.htm) 

(Liu Die Yu's http://www.safecenter.net/UMBRELLAWEBV4/DblSlashForCache/Dbl SlashForCache-Content.htm)

At last, Overwrite NOTEPAD.EXE and make IE launch it by openning a view-source protocol URL:

(HTTP-EQUIV of MALWARE 's http://www.securityfocus.com/archive/1/343521) 



[Workaround]

Disable Active Scripting in INTERNET zone, so HTML page opened in the cache can't send information back to the attacker.



[Greetings]

greetings to:

Drew Copley, dror, guninski, vadim and mkill.



-----

all mentioned resources can always be found at UMBRELLA.MX.TC



[people]

LiuDieyuinchina [N0-@-Sp2m] yahoo.com.cn

UMBRELLA.MX.TC ==> How to contact "Liu Die Yu"



[Employment]

I would like to work professionally as a security researcher/bug finder. 



See my resume at my site. I am very eager to work, flexible, and 

extremely productive. I have a top notch resume, with credentials 

from leading bug finders. I am willing to work per contract, relocate, 

or telecommute. 

 

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