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Apache mod_proxy Interim Responses Denial of Service
Secunia Advisory: SA30621
Release Date: 2008-06-11
Last Update: 2008-06-16
Popularity: 7,683 views

Critical:
Less critical
Impact: DoS
Where: From remote
Solution Status: Partial Fix

Software:Apache 2.0.x
Apache 2.2.x

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CVE reference:CVE-2008-2364


Description:
A vulnerability has been reported in the Apache mod_proxy module, which potentially can be exploited by malicious people to cause a DoS (Denial of Service).

The vulnerability is caused due to an error in the "ap_proxy_http_process_response()" function when forwarding interim responses. This can be exploited to consume large amounts of memory by tricking mod_proxy into sending an overly large number of interim responses to the client.

The vulnerability is reported in versions 2.2.8 and 2.0.63. Other versions may also be affected.

Solution:
Update to version 2.2.9.

Fixed in the SVN repository.
http://svn.apache.org/viewvc/httpd/ht...6154&r2=666153&pathrev=666154

Restrict proxy access to trusted users only.

Provided and/or discovered by:
The vendor credits Ryujiro Shibuya.

Changelog:
2008-06-16: Updated "Solution" section. Added vendor link to the "Original Advisory" section.

Original Advisory:
http://httpd.apache.org/security/vulnerabilities_22.html

http://svn.apache.org/viewvc/httpd/ht...6154&r2=666153&pathrev=666154


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