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Firefox leaks info useful to attackers

Slimy   on 23 January 2008 - 20:30 · 17 comments & 23654 views

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Mozilla's head of security yesterday confirmed a bug in Firefox that could be used by attackers to scout out a system prior to mounting a more thorough assault. The flaw, said Window Snyder, Mozilla Corp.'s chief security officer, is in the browser's chrome protocol, she said in response to reports of the vulnerability and the public posting of a proof-of-concept exploit. "Chrome" is the Firefox term for its user interface. Access to a user's machine would be through one of many Firefox extensions packaged in a flat file structure, rather than collected into a single Java archive, or .jar file, said Snyder. Several popular add-ons, including Download Statusbar and Greasemonkey, use a flat file structure. "Users are only at risk if they have one of the 'flat' packaged add-ons installed," Snyder said on the Mozilla security blog.

By leading users to a tricked-out Web page, criminals could sniff for information that might be useful in more aggressive attacks, Snyder acknowledged. "A visited attacking page is able to load images, scripts or style sheets from known locations on the disk," she said. "Attackers may use this method to detect the presence of files which may give an attacker information about which applications are installed. This information may be used to profile the system for a different kind of attack." Firefox developers are working on a patch, according to a thread on Bugzilla, Mozilla's bug-tracking and management site, but a fix has not yet been coded.

View: Full Story @ Computerworld

Post a comment · Send to friend Comments · There are 17 additional comments
(6 replies) #1 swandike on 23 Jan 2008 - 21:44
why report it?...who cares? once everyone know...some mfck will start using it against ordinary people
#1.1 _dandy_ on 23 Jan 2008 - 21:51
(swandike said @ #1)
why report it?...who cares? once everyone know...some mfck will start using it against ordinary people


Because if this was IE, every IT news site would be all over it.

Can't have a double-standard, fanboy.
#1.2 TRC on 23 Jan 2008 - 22:12
why report it?...who cares?


Wow.
#1.3 Cryton on 23 Jan 2008 - 22:25
(swandike said @ #1)
why report it?

Because it's news, and this is a news site?
#1.4 whocares78 on 24 Jan 2008 - 00:00
report it so people are aware of it adn can avoid any possible issues so the 'mfck' can't use it against 'ordinary people'.... when you can write exploit code let me know, not everyone can do it, in fact not a lot of people can...it's not that easy..
#1.5 swandike on 24 Jan 2008 - 02:55
its like saying....'hey Tesco has no security guard in the night after 2am and doors ar open with no CCTV.' All thieves will be happy to know that.
#1.6 whocares78 on 24 Jan 2008 - 03:10
(swandike said @ #1.5)
its like saying....'hey Tesco has no security guard in the night after 2am and doors ar open with no CCTV.' All thieves will be happy to know that.


however you have no idea where that tesco is so the thieves will need to run around to every single tesco to find out which one it is...and by the time they have, the security guard will be back and the doors locked
#2 ricksterto on 23 Jan 2008 - 22:19
A potentially important part of the article missed in the story copy however:

Firefox users can also deploy another add-on, the popular NoScript, to block exploits, regardless of which extensions have been installed, updated or not. "[NoScript] block[s] chrome JavaScript load attempts," reported Giorgio Maone, NoScript's maker, on the same Bugzilla thread.

Not a permanent fix (lol ...is anything related to browsers permanent?) but something that can be used while something is developed.
(1 reply) #3 Typhon on 23 Jan 2008 - 22:30
I always say no to java.
#3.1 +M2Ys4U on 24 Jan 2008 - 07:19
This has nothing to do with Java, apart from the archive format which is just zip, basically...
(3 replies) #4 occam on 23 Jan 2008 - 22:36
Is Mozilla's CSO really called 'Window' or is this a tongue-in-cheek pseudonym?

#4.1 EchoNoise on 23 Jan 2008 - 23:33
Haha, thats what I'm thinking
#4.2 whocares78 on 23 Jan 2008 - 23:57
yeah that made me laugh tooo....
#4.3 TRC on 24 Jan 2008 - 00:23
Nope, that's really her name.
(2 replies) #5 UAC on 24 Jan 2008 - 08:59
yet another reason to use IE7 with Vista. In Vista, IE7 has the Protected Mode (enabled by default) and so it runs like in a sandbox

Last edited by UAC on 24 Jan 2008 - 09:04
#5.1 boho on 24 Jan 2008 - 11:46
Snore...
#5.2 ricksterto on 24 Jan 2008 - 23:57
"runs like a sandbox"....

you're bang on if you mean the one that the cat uses.

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