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TITLE:
Apache mod_proxy Interim Responses Denial of Service

SECUNIA ADVISORY ID:
SA30621

VERIFY ADVISORY:
http://secunia.com/advisories/30621/

CRITICAL:
Less critical

IMPACT:
DoS

WHERE:
>From remote

SOFTWARE:
Apache 2.0.x
http://secunia.com/product/73/
Apache 2.2.x
http://secunia.com/product/9633/

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:
Fixed in the SVN repository.
http://svn.apache.org/viewvc/httpd/httpd/trunk/modules/proxy/mod_proxy_http.c?r1=666154&r2=666153&pathrev=666154

Restrict proxy access to trusted users only.

PROVIDED AND/OR DISCOVERED BY:
The vendor credits Ryujiro Shibuya.

ORIGINAL ADVISORY:
http://svn.apache.org/viewvc/httpd/httpd/trunk/CHANGES?r1=666154&r2=666153&pathrev=666154

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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/


Please Note:
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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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