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Carpet bomb via any browser?

by R. Proffitt Forum moderator / June 22, 2008 10:14 AM PDT

Given that recent Safari debacle (sorry if I press the fast forward button here) it dawned on me that ANY browser that defaults to downloading files to the desktop could trick users into this again.

I have a guinea pig to do that to but for those among us that dig into these things I ask. Do you see that?
Bob

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Wasn't the Safari browser vulnerable as it cannot be ...
by Marianna Schmudlach / June 22, 2008 11:14 AM PDT

..configured to obtain the user?s permission before it downloads a resource. Safari downloads the resource without the user?s consent and places it in a default location (unless it is changed).

Overview

Apple Safari does not prompt the user before downloading an object that has an unrecognized content type, which allows remote attackers to place malware into the (1) Desktop directory on Windows or (2) Downloads directory on Mac OS X, aka a "Carpet Bomb," a different issue than CVE-2008-1032. NOTE: Apple reportedly has stated that "we are not treating this as a security issue." NOTE: Microsoft describes the issue on the Windows platform as "a blended threat that allows remote code execution."


http://nvd.nist.gov/nvd.cfm?cvename=CVE-2008-2540

I am NOT aware of any ANY other browser.....

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Which is why I'm asking.
by R. Proffitt Forum moderator / June 22, 2008 12:12 PM PDT

The default download for Firefox is the desktop. While firefox asks if it's ok to download a file this being the default I see how this default location is just a bad idea given how the carpet bomb worked.

Something needs to be tweaked by Microsoft to not execute this type file just because it's on the desktop?
Bob

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I would say..... Windows BUG.......
by Marianna Schmudlach / June 22, 2008 12:28 PM PDT
This brings us to a pressing question. In the ?real world?, users install products from multiple vendors. Whose responsibility is it to examine the interaction between all these products?
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I agree.
by R. Proffitt Forum moderator / June 22, 2008 11:36 PM PDT

If we look at IE's default download location, it's not the desktop. But users ask "Where is that file I downloaded?" We can see that making the desktop the default location would make it easy for the casual user but it makes for an exploit point. That is, the user may have downloaded it but it will auto-execute which is where I see the issue.
Bob

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I just read this.......
by Marianna Schmudlach / June 22, 2008 11:38 AM PDT

quote:

Rios mentioned on his blog that when Safari is used on a system that also has Firefox 2/3 installed, could lead to providing an attacker the opportunity to steal arbitrary files from the filesystem. Rios stated that he would not go into further details at this time, as the issue is not fixed by the current Safari patch; however, he did mention that Firefox 3 is vulnerable, but has some protections that help mitigate the issue somewhat.

http://blogs.zdnet.com/security/?p=1319

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Another reason to not Safari
by albizzia / June 24, 2008 7:51 AM PDT

I had downloaded and tried Safari for Windows, didn't like the way it handled Favorites/Bookmarks - it loads them as a web page, which is much slower than a simple pull-down menu. It was supposed to be faster than IE - but most definitely wasn't. Nor did I care for the cluttered toolbar, or the "oh so cool but hard to read" color scheme.

And now I find that in typical Apple fashion, it does things without user permission, but in this case it leads to potential security breaches.

Time to remove it and free up hard disk space.

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(NT) So what about this new idea?
by R. Proffitt Forum moderator / June 24, 2008 8:33 AM PDT
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