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Apache Modules Multiple Vulnerabilities

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Release Date:  2007-12-12    Last Update:  2008-07-10    Views:  30,506

Secunia Advisory SA28046

Where:

From remote

Impact:

Cross Site Scripting, DoS

Solution Status:

Vendor Patch

CVE Reference(s):

Description


Some vulnerabilities have been reported in multiple Apache modules, which can be exploited by malicious people to conduct cross-site scripting and cross-site request forgery attacks and by malicious users and malicious people to cause a DoS (Denial of Service).

1) Certain unspecified input passed to "mod_imagemap" is not properly sanitised before being returned to the user. This can be exploited to execute arbitrary HTML and script code in a user's browser session in context of an affected site.

Successful exploitation requires that "mod_imagemap" is enabled and a mapfile is publicly accessible.

2) Input passed via the "refresh" parameter to the "mod_status" module is not properly sanitised before being returned to the user. This can be exploited to execute arbitrary HTML and script code in a user's browser session in context of an affected site.

Successful exploitation requires that "mod_status" is enabled and that the status pages are publicly accessible.

3) Input passed via the worker route and the worker redirect string to the "mod_proxy_balancer" module is not properly sanitised before being returned to the user. This can be exploited to execute arbitrary HTML and script code in a user's browser session in context of an affected site.

Successful exploitation requires that "mod_proxy_balancer" is enabled.

4) An error exists within the balancer manager functionality of the "mod_proxy_balancer" module. This can be exploited by malicious users to cause a DoS via an invalid balancer name.

Successful exploitation results in a crash if a threaded Multi-Processing Module is used on servers where "mod_proxy_balancer" is enabled.

5) The administrative interface of the "mod_proxy_balancer" module allows users to perform certain actions via HTTP requests without performing any validity checks to verify the request. This can be exploited to perform actions with the privileges of a target user, who is tricked into visiting a malicious website.

The vulnerabilities are reported in versions 2.2.6, 2.2.5, 2.2.4, 2.2.3, 2.2.2, and 2.2.0.

NOTE: An error in the "mod_proxy_ftp" module when a forward proxy is configured has also been reported. This can potentially be exploited to conduct cross-site scripting attacks.

6) A memory leak within the "mod_ssl" module can be exploited to cause a DoS by opening a large amount of SSL connections with zlib support.

Successful exploitation of this vulnerability requires that the module is linked against OpenSSL 0.9.8f or later.


Solution:
Update to version 2.2.9.

Further details available to Secunia VIM customers

Provided and/or discovered by:
1) Reported by the vendor.
2, 3, 4, 5) sp3x, SecurityReason
6) The vendor thanks Joe Orton, Amund Elstad, and Dr Stephen Henson

Original Advisory:
http://httpd.apache.org/security/vulnerabilities_22.html
http://svn.apache.org/viewvc/httpd/httpd/branches/2.2.x/CHANGES?revision=608860

SecurityReason:
http://securityreason.com/securityalert/3541
http://securityreason.com/securityalert/3523
http://securityreason.com/securityalert/3526

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 Modules Multiple Vulnerabilities

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