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Re: lots of connections to 64.40.117.19 port 80
From: news () dmcdonald net
Date: Fri, 18 Apr 2008 16:11:53 +0100 (BST)

J,

Eh? The closest thing I can think of to what you're saying is if the cause
of a DDOS was stored XSS on a popular site(s) being used get users
browsers to request information from 64.40.117.19. The XSS would be done
else where, and the DDOS attack itself would contain no 'payload'.

In which case filtering user input on his side isnt going to anything.
Plus, you still have no reason for calling this a textbool case of XSS, or
anything else for that matter. Without seeing the tcpdump, all we can do
is reel of a list of things in might be.

Best,

Renski

News,

I believe you are missing something. XSS is merely a type of
vulnerability. It is very common for an XSS payload to include a
DDoS component. If you had done your research before retorting you
would have known this.

J

On Fri, 18 Apr 2008 10:25:38 -0400 news () dmcdonald net wrote:
Joey,

a text book case? Prehaps im missing something, but see nothing in
Genbolds email which makes me consider XSS. XSS is often a small
amount of
traffic, with HTML and javascript in post request content or get
request
query strings.

Ganbold,

In my opinion, it's more likely it's one of the following

* brute force or dictionary attack on a login form, prehaps using
a botnet
to mask the actual attacker
* DDOS, again prehaps from a botnet
* DOS, prehaps creating half open connects using a random spoofed
source
addresses (try and check to see if the addresses are random, or
come for a
fixed set of IPs).
* Someone looking for hidden files and directories
* An automated script scraping the website for dynamic or a large
amount
of content, or some other tool which is malfunctioning
* The website is just really popular and your client needs to
upgrade
their kit

Attempt to find out what kind of requests (if any) are being sent
to the
server, prehaps using a tool like wireshark, and that should tell
you a
little about what is going on.

Best,

Renski

Ganbold,

This sounds like a textbook case of Cross Site Scripting (XSS).
Consider filtering user output more carefully.

J

On Fri, 18 Apr 2008 03:54:24 -0400 Ganbold
<ganbold () micom mng net>
wrote:
Hi,

Recently I have seen a lots of connections to 64.40.117.19 port
80
in
one of our clients network.
Connections are coming from all over the Internet (various
different
IPs) specifically to this IP.
Due to this problem (I guess it is DDoS) one of our router's CPU
usage
grew up to 100% and stopped a service
for a while.
What kind of problem this could be?
Has anybody seen this kind of attack before?
I appreciate if somebody can enlighten me in this regard.

thanks in advance,

Ganbold

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