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TITLE:
Apache Tomcat Cross-Site Scripting and Security Bypass

SECUNIA ADVISORY ID:
SA31379

VERIFY ADVISORY:
http://secunia.com/advisories/31379/

CRITICAL:
Moderately critical

IMPACT:
Security Bypass, Cross Site Scripting

WHERE:
>From remote

SOFTWARE:
Apache Tomcat 5.x
http://secunia.com/product/3571/
Apache Tomcat 4.x
http://secunia.com/product/328/

DESCRIPTION:
Two vulnerabilities have been reported in Apache Tomcat, which can be
exploited by malicious people to conduct cross-site scripting attacks
or to bypass certain security restrictions.

1) Input passed to the "HttpServletResponse.sendError()" function is
not properly sanitised before being returned to the user in the HTTP
"Reason-Phrase". This can be exploited to execute arbitrary HTML and
script code in a user's browser session in context of an affected
site.

2) The vulnerability is caused due to the application normalising the
target path before removing the query string when using a
"RequestDispatcher". This can be exploited to access normally
restricted files via e.g. directory traversal attacks.

The vulnerabilities are reported in the following versions: 
* 4.1.0 through 4.1.37
* 5.5.0 through 5.5.26

SOLUTION:
Fixed in the SVN repository.

Apache Tomcat 5.5.x:
http://svn.apache.org/viewvc?rev=680949&view=rev
http://svn.apache.org/viewvc?rev=680947&view=rev

Apache Tomcat 4.1.x:
http://svn.apache.org/viewvc?rev=680950&view=rev
http://svn.apache.org/viewvc?rev=680948&view=rev
http://svn.apache.org/viewvc?rev=680947&view=rev

PROVIDED AND/OR DISCOVERED BY:
The vendor credits:
1) Konstantin Kolinko
2) Stefano Di Paola of Minded Security Research Labs

ORIGINAL ADVISORY:
Apache:
http://tomcat.apache.org/security-4.html
http://tomcat.apache.org/security-5.html

http://marc.info/?l=tomcat-user&m=121759964027135&w=2
http://marc.info/?l=tomcat-user&m=121759966427171&w=2

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About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

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http://secunia.com/about_secunia_advisories/


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Secunia NEVER sends attached files with advisories.
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use those supplied by the vendor.

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