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

Changelog
Further details available to Secunia VIM customers

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