Tomcat Input Validation Hole in HttpServletResponse.sendError() Permits Cross-Site Scripting Attacks
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SecurityTracker Alert ID: 1020622
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SecurityTracker URL: http://securitytracker.com/id?1020622
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CVE Reference: CVE-2008-1232
(Links to External Site)
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Date: Aug 4 2008
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Impact: Disclosure of authentication information, Disclosure of user information, Execution of arbitrary code via network, Modification of user information
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Fix Available: Yes
Vendor Confirmed: Yes
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Version(s): 4.1.0 to 4.1.37, 5.5.0 to 5.5.26, 6.0.0 to 6.0.16
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Description: A vulnerability was reported in Tomcat. A remote user can conduct cross-site scripting attacks.
The HttpServletResponse.sendError() function does not properly filter HTML code from user-supplied input before displaying the input
on an error page. A remote user can create a specially crafted URL that, when loaded by a target user, will cause arbitrary scripting
code to be executed by the target user's browser. The code will originate from the site running the Tomcat software and will run
in the security context of that site. As a result, the code will be able to access the target user's cookies (including authentication
cookies), if any, associated with the site, access data recently submitted by the target user via web form to the site, or take
actions on the site acting as the target user.
Konstantin Kolinko reported this vulnerability.
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Impact: A remote user can access the target user's cookies (including authentication cookies), if any, associated with the site running the
Tomcat software, access data recently submitted by the target user via web form to the site, or take actions on the site acting
as the target user.
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Solution: The vendor has issued a fixed version (6.0.18).
For version 5.5.x, a fix is available via SVN or via this patch:
http://svn.apache.org/viewvc?rev=680947&view=rev
For version 4.1.x, a fix is available via SVN or via this patch:
http://svn.apache.org/viewvc?rev=680947&view=rev (connector
only)
http://svn.apache.org/viewvc?rev=680948&view=rev
The vendor's advisory is available at:
http://tomcat.apache.org/security.html
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Vendor URL: tomcat.apache.org/security.html (Links to External Site)
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Cause: Input validation error
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Underlying OS: Linux (Any), UNIX (Any), Windows (Any)
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Reported By: Mark Thomas <markt@apache.org>
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Message History:
This archive entry has one or more follow-up message(s) listed below.
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Source Message Contents
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Date: Fri, 01 Aug 2008 15:06:19 +0100
From: Mark Thomas <markt@apache.org>
Subject: [CVE-2008-1232] Apache Tomcat XSS vulnerability
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-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
CVE-2008-1232: Apache Tomcat XSS vulnerability
Severity: Low
Vendor:
The Apache Software Foundation
Versions Affected:
Tomcat 4.1.0 to 4.1.37
Tomcat 5.5.0 to 5.5.26
Tomcat 6.0.0 to 6.0.16
The unsupported Tomcat 3.x, 4.0.x and 5.0.x versions may be also affected
Description:
The message argument of HttpServletResponse.sendError() call is not only
displayed on the error page, but is also used for the reason-phrase of HTTP
response. This may include characters that are illegal in HTTP headers. It
is possible for a specially crafted message to result in arbitrary content
being injected into the HTTP response. For a successful XSS attack,
unfiltered user supplied data must be included in the message argument.
Mitigation:
6.0.x users should upgrade to 6.0.18
5.5.x users should obtain the latest source from svn or apply this patch
which will be included from 5.5.27
http://svn.apache.org/viewvc?rev=680947&view=rev
4.1.x users should obtain the latest source from svn or apply this patch
which will be included from 4.1.38
http://svn.apache.org/viewvc?rev=680947&view=rev (connector only)
http://svn.apache.org/viewvc?rev=680948&view=rev
Example:
<%@page contentType="text/html"%>
<%
~ // some unicode characters, that result in CRLF being printed
~ final String CRLF = "\u010D\u010A";
~ final String payload = CRLF + CRLF + "<script
type='text/javascript'>document.write('Hi, there!')</script><div
style='display:none'>";
~ final String message = "Authorization is required to access " + payload;
~ response.sendError(403, message);
%>
Credit:
This issue was discovered by Konstantin Kolinko.
References:
http://tomcat.apache.org/security.html
Mark Thomas
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