Re: ICQ Buffer Overflow Exploit

[mattison () WEBOVISION COM (Dennis W. Mattison (Little Wolf))]

Two things:

1. I am not able to verify this vulnerability under Windows98, running ICQ
99b Beta 3.19 Build 2569.  I tried sending excessively long URL's using
the URL message send (I could not find a way of sending a URL during chat,
other than typing it in the window, you might send out the instructions on
how to do this) and was unable to buffer overflow the program.  I'll keep
trying, there might be something I am not doing right...

2. I do not agree with your fix, however.  There is a much simpler fix
available, go into the Preferences window, select the Events tab, select
the URL setting on the "Select Event to Configure" combobox and then
select "Auto Decline."  This appears to shut down the http event.  I've
tried sending URL messages back and forth between two machines and was
unable to receive them.  I've turned all events off in ICQ, it is much
easier to tell someone I am chatting with to look at a particular URL
without using the URL message capability.

-----Original Message-----
From: Bugtraq List [mailto:BUGTRAQ () SECURITYFOCUS COM]On Behalf Of drew
copley
Sent: Tuesday, January 11, 2000 10:31 AM
To: BUGTRAQ () SECURITYFOCUS COM
Subject: ICQ Buffer Overflow Exploit

Buffer Overflow in ICQ
--Stuff Deleted--

---
Dennis W. Mattison (Little Wolf)
(This message should be signed, please verify signature if you suspect
fraud.)


<HR NOSHADE>
<UL>
<LI>application/x-pkcs7-signature attachment: smime.p7s
</UL>