another IE weakness exposed

Heeter

Overclocked Like A Mother
Joined
8 Jul 2002
Messages
2,732
A cut 'n' paste from Bink.nu.

Critical: Moderately critical
Impact: Security Bypass

Where: From remote

Software: Microsoft Internet Explorer 6

Description:
http-equiv has identified a vulnerability in Internet Explorer, allowing malicious web sites to spoof the file extension of downloadable files.

The problem is that Internet Explorer can be tricked into opening a file, with a different application than indicated by the file extension. This can be done by embedding a CLSID in the file name. This could be exploited to trick users into opening "trusted" file types which are in fact malicious files.

Secunia has created an online test:
http://secunia.com/Internet_Explorer_File_Download_Extension_Spoofing_Test/

This has been reported to affect Microsoft Internet Explorer 6.

NOTE: Prior versions may also be affected.

Solution:
Do not use "Open" file, always save files to a folder as this reveals the suspicious filename.

Provided and/or discovered by:
http-equiv


News Source: MSFN.org


Heeter
 

Reg

eXperienced!
Joined
2 Mar 2002
Messages
639
I've seen that before back in the day with IE5. I'm surpised they haven't fixed that by now. Well, good thing I don't use IE.
 

Xie

- geek -
Joined
29 Sep 2003
Messages
5,274
How can an exploit in the day and age of spam/IRC, and other places ppl are exposed to a never ending spam of URL's, be only "Moderately critical" when they could be clicking what they think is a harmless jpg and instead is a exe that destroys everything on there computer or turns it into a DDoS zombie?
 

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