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Hi,

The hostname update plugin, which comes with licq by default, forms 
a security vulnerability. I've opened a bug report in the 
sourceforge bugzilla, and I've mentioned it on the licq irc 
channel, but just to be sure it gets through to the developers I'm 
sending it to the list as well. Sorry if you are already working on 
it, but I haven't heard anything back yet and I think this is 
Important.

So what's the problem?

- From Bugzilla, bug ID 594682:

Let's say a cracker creates a new ICQ account and sets the alias to 
the hostname of your favourite remote box (for example the telnet 
server at your work). The cracker then sends you a message. The 
plug-in will add the hostname, together with his IP, to /etc/hosts. 
Now you want to do some work on the remote machine, and you telnet 
into it. Since /etc/hosts goes before the DNS server in the search 
for the right IP address, you will actually connect to the crackers 
box instead. The cracker can then forward the connection to the 
real box in the standard man-in-the-middle manner, and monitor your 
activities, steal passwords, etcetera.

With this in mind I suggest the hostname update plugin be removed 
from the licq distribution ASAP.

Regards,

Lourens, who is not on the list and would like to be CC'd on any 
replies.
- -- 
GPG public key: http://home.student.utwente.nl/l.e.veen/lourens.key
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