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Insecure Library Loading
Moderately critical

Apache Tomcat Multiple Vulnerabilities

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Release Date:  2009-06-04    Last Update:  2012-09-28    Views:  11,018

Secunia Advisory SA35326

Where:

From remote

Impact:

Manipulation of data, Exposure of system information, Exposure of sensitive information, DoS

Solution Status:

Vendor Patch

CVE Reference(s):

Description


Multiple vulnerabilities and a security issue have been reported in Apache Tomcat, which can be exploited by malicious users to disclose sensitive information or manipulate certain data and by malicious people to cause a DoS (Denial of Service) or disclose sensitive information.

1) An error exists when processing invalid HTTP headers received via the Java AJP connector. This can be exploited to close AJP connections and temporarily block a connector that is a member of a mod_jk load balancing worker.

2) An error in certain authentication classes can be exploited to potentially enumerate existing usernames via specially crafted URL-encoded passwords and brute force attacks.

Successful exploitation of this vulnerability requires that form based authentication ("j_security_check") with one of the "MemoryRealm", "DataSourceRealm", or "JDBCRealm" authentication realms is used.

3) It is possible for a web application to replace the XML parser used by Tomcat to process web.xml and tld files. In certain circumstances this may be exploited by a malicious web application to view or alter the web.xml and tld files of other web applications deployed on the Tomcat instance.

4) The server normalises 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 versions 4.1.0 through 4.1.39 and 5.5.0 through 5.5.27.


Solution:
Update to version 4.1.40 or 5.5.28.

Provided and/or discovered by:
The vendor credits:
1) Yoshihito Fukuyama
2) D. Matscheko and T. Hackner of SEC Consult
3) Philippe Prados
4) Iida Minehiko, Fujitsu Limited

Original Advisory:
http://tomcat.apache.org/security-4.html
http://tomcat.apache.org/security-5.html

http://marc.info/?l=tomcat-user&m=124404378413716&w=2
http://marc.info/?l=tomcat-user&m=124404378913734&w=2
http://marc.info/?l=tomcat-user&m=124412001618125&w=2
http://marc.info/?l=tomcat-user&m=124449799021571&w=2

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: Apache Tomcat Multiple Vulnerabilities

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