From: Secunia Security Advisories (sec-advsecunia.com)
Date: Tue Jul 26 2005 - 09:35:28 CDT

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TITLE:
Apache HTTP Request Smuggling Vulnerability

SECUNIA ADVISORY ID:
SA14530

VERIFY ADVISORY:
http://secunia.com/advisories/14530/

CRITICAL:
Less critical

IMPACT:
Security Bypass, Cross Site Scripting, Manipulation of data

WHERE:
From remote

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

DESCRIPTION:
A vulnerability has been reported in Apache, which can be exploited
by malicious people to conduct HTTP request smuggling attacks.

The vulnerability is caused due to an error in the handling of
malformed HTTP requests with both "Transfer-Encoding" and
"Content-Length" headers and can be exploited to cause Apache to
forward malicious HTTP requests in the HTTP body, which will be
processed as a separate HTTP requests by the receiving server.

Successful exploitation allows poisoning of the web proxy cache or
bypass of certain web application firewall protections, but requires
that Apache is configured as a web proxy.

An off-by-one error has also been reported in mod_ssl when printing
debug information and configured to use a malicious CRL (Certificate
Revocation List).

SOLUTION:
Reportedly, the vulnerabilities will be fixed in the upcoming version
2.0.55.

PROVIDED AND/OR DISCOVERED BY:
HTTP request smuggling reported by:
Watchfire

CRL issue reported by:
Marc Stern

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About:
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