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  #1  
Old 2008-01-18, 11:59 AM
U2Lynne's Avatar
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Attention uTorrent and BitTorrent users!

From here: http://torrentfreak.com/bittorrent-c...attack-080117/
Quote:
uTorrent and Official BitTorrent Client Vulnerable to Remote DOS Attack
Written by enigmax on January 17, 2008

Both the official BitTorrent and uTorrent clients are vulnerable to a remote denial-of-service attack, due to the way they handle user-supplied data. Versions found to be vulnerable so far are the official BitTorrent 6.0 client, uTorrent 1.7.x, uTorrent 1.6.x and uTorrent 1.8-alpha-7834.

Security vulnerabilities in BitTorrent clients are relatively rare, although not unheard of. Luigi Auriemma, a Milan-based security expert, claims to have found a vulnerability in various BitTorrent clients based on the way they handle user-supplied data. The flaw allows an attacker to crash the application, effectively denying service to legitimate users. Code execution is not possible, which means there is little reason for users to panic.

So far, the problem appears to affect these clients:

- BitTorrent 6.0 (build 5535)
- uTorrent 1.7.5 (build 4602)
- uTorrent 1.8 (alpha 7834)

Luigi is reporting that earlier versions of these clients may also be vulnerable and this appears to have been confirmed by the uTorrent team. The problems are confirmed to exist on Windows versions of the software. As yet, Mac and Linux versions of the official BitTorrent client have not been tested.

The bug in detail (from Luigi’s site):
Quote:
By default both the clients have the “Detailed Info” window active with the “General” section visible in it where are reported various informations about the status of the torrent and the trackers in use.

In this same window near “General” there is also the “Peers” section which is very useful since it showes many informations about the other connected clients like the percentage of availability of the shared torrent, their IP address, country, speed and amount of downloaded and uploaded data and moreover the version of their client (like “BitTorrent 6.0″, “Azureus 3.0.3.4″, “uTorrent 1.7.5″, “KTorrent 2.2.4″ and so on).

When this window is visualized by the user the unicode strings with the software versions of the connected clients are copied in the relative static buffers used for the visualization in the GUI through the wcscpy function.

If this string is too long a crash will occur immediately or in some cases (like on BitTorrent) could happen later or when the user watches the status of another torrent or leaves the “Peers” window. Code execution is not possible.

For exploiting the problem is enough that an external attacker connects to the random port opened on the client and sends the long client version and the SHA1 hash of the torrent currently in use and watched
on the target. Note that all these parameters (client IP, port and torrent’s hash) are
publicly available on the tracker.
The uTorrent team state the flaw affects all older uTorrent versions 1.6 and 1.7.x. too but have been quick to respond, releasing a new build - uTorrent 1.7.6 (build 7859) which has fixed the issue.

It can be downloaded here.
edit 2008-01-27: Newest utorrent is 1.7.7: http://download.utorrent.com/1.7.7/utorrent.exe
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  #2  
Old 2008-01-18, 12:11 PM
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paddington paddington is offline
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Re: Attention uTorrent and BitTorrent users!

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  #3  
Old 2008-01-18, 04:34 PM
Salva Veritate Salva Veritate is offline
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Re: Attention uTorrent and BitTorrent users!

Doesn't utorrent 1.7.x report your download information or something? Or was that some paranoid/exaggerated rumor?
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  #4  
Old 2008-01-19, 12:12 PM
bartmanus bartmanus is offline
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Re: Attention uTorrent and BitTorrent users!

It is only a paranoid rumor.

Doesn't the RIAA (who sues some P2P users) use clients to vew who connects to tem? That way they get users inetrnet addresses which they can then get warrants for ISPs to link to customers.

All clients are vulnerable to such an 'attack'. But AFAIK RIAA has only sued Kazaa users while they continually try to bring down ed2k portals and torrent hosting sites.
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  #5  
Old 2008-01-19, 04:51 PM
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rosc2112 rosc2112 is offline
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Re: Attention uTorrent and BitTorrent users!

Crash bugs from buffer overruns are pretty common (and symptomatic of programmers who don't know what bounds checking is for..)
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  #6  
Old 2008-01-20, 11:51 PM
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lbeatle lbeatle is offline
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Re: Attention uTorrent and BitTorrent users!

My uTorrent client has been upgraded.
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  #7  
Old 2008-01-21, 01:52 AM
datdork datdork is offline
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Re: Attention uTorrent and BitTorrent users!

seems that 1.6 is fine. 1.6.1 build 190 is the most stable and I'm not about to "upgrade" to 1.76 call me paranoid if ya won't but I haven't trusted them since 1.7X



many many dorks have tried/tested the crash exploit on all versions and this is what they came up with.


Quote:
1.6.0 (474) fine (but vulnerable to exploit1)
1.6.1 (488) fine
1.6.1 (489) fine
1.6.1 (490) fine
1.7.0 (3353) bugged
1.7.1 (3360) bugged
1.7.2 (3458) bugged
1.7.3 (4470) bugged
1.7.4 (4482) bugged
1.7.5 (4602) bugged
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  #8  
Old 2008-01-21, 03:26 AM
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saltman saltman is offline
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Re: Attention uTorrent and BitTorrent users!

Try Halite

http://sourceforge.net/project/scree...roup_id=179129
http://sourceforge.net/project/showf...roup_id=179129
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  #9  
Old 2008-01-22, 09:15 PM
dannyandamie dannyandamie is offline
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Re: Attention uTorrent and BitTorrent users!

What is RIAA? WHat is P2P? Do they really get IP addys and sue? What torrent should I use?
What does U2Lynne use? What does Dylan use? You guys are great!
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  #10  
Old 2008-01-22, 09:21 PM
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rosc2112 rosc2112 is offline
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Re: Attention uTorrent and BitTorrent users!

Quote:
Originally Posted by dannyandamie View Post
What is RIAA? WHat is P2P? Do they really get IP addys and sue? What torrent should I use?
What does U2Lynne use? What does Dylan use? You guys are great!
Go back to sleep.
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  #11  
Old 2008-01-22, 09:28 PM
dannyandamie dannyandamie is offline
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Re: Attention uTorrent and BitTorrent users!

Quote:
Originally Posted by rosc2112 View Post
Quote:
Originally Posted by dannyandamie View Post
What is RIAA? WHat is P2P? Do they really get IP addys and sue? What torrent should I use?
What does U2Lynne use? What does Dylan use? You guys are great!
Go back to sleep.
Meaning???
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  #12  
Old 2008-01-22, 09:47 PM
dannyandamie dannyandamie is offline
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Re: Attention uTorrent and BitTorrent users!

Quote:
Originally Posted by rosc2112 View Post
Quote:
Originally Posted by dannyandamie View Post
What is RIAA? WHat is P2P? Do they really get IP addys and sue? What torrent should I use?
What does U2Lynne use? What does Dylan use? You guys are great!
Go back to sleep.
I'm not sure that this answered any of my questions..?/?
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  #13  
Old 2008-01-22, 11:39 PM
U2Lynne's Avatar
U2Lynne U2Lynne is offline
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Re: Attention uTorrent and BitTorrent users!

Quote:
Originally Posted by dannyandamie View Post
Quote:
Originally Posted by rosc2112 View Post
Quote:
Originally Posted by dannyandamie View Post
What is RIAA? WHat is P2P? Do they really get IP addys and sue? What torrent should I use?
What does U2Lynne use? What does Dylan use? You guys are great!
Go back to sleep.
I'm not sure that this answered any of my questions..?/?
I'm on a Mac and use Azureus, so this notice didn't affect me, but I know that many of the users on this site use uTorrent which is why this was posted.
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  #14  
Old 2008-01-23, 09:53 AM
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dementrium dementrium is offline
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Re: Attention uTorrent and BitTorrent users!

Ironically, these are very good news to me. Why? Because, now I can connect the dots to what probably happened to me in December.

The symptoms, so far...

The torrents happened to stop with an O.S. error msg. Something like "insufficient resources to complete the requested command".
Also, the other applications where affected too. Windows was unable to even display the some desktop icons. All in all, the system was dragging on its knees.
Reboot. Started (the same) torrents again. After a few minutes, the same thing.

It seemed that the problem wasn't related to RAM or HD resources.

After some checking, I was totally clueless. So, did what I call a PSM (Placebo System Maintenance).

This time the PSM consisted of freeing some HD space, backuping/erasing all torrent activity. So, I started torrenting again from zero, with new torrents. The problem didn't happen again. (Dots connected with the issue mentioned here... I hope ).

I will not upgrade at this moment, just to see if this happen again.

Thank you, people, for this info.
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  #15  
Old 2008-01-23, 10:52 AM
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tgunn2760 tgunn2760 is offline
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Re: Attention uTorrent and BitTorrent users!

Quote:
Originally Posted by bartmanus View Post
It is only a paranoid rumor.

Doesn't the RIAA (who sues some P2P users) use clients to vew who connects to tem? That way they get users inetrnet addresses which they can then get warrants for ISPs to link to customers.

All clients are vulnerable to such an 'attack'. But AFAIK RIAA has only sued Kazaa users while they continually try to bring down ed2k portals and torrent hosting sites.

I always have this on, even when downloading legal bootlegs:


http://phoenixlabs.org/pg2/
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