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Apache HTTP Request Smuggling Vulnerability
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Secunia Advisory:
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SA14530
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Release Date:
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2005-07-26
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Last Update:
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2005-10-19
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Popularity:
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22,403 views
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Critical:
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Less critical
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Impact:
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Security Bypass
Cross Site Scripting
Manipulation of data
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Where:
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From remote
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Solution Status:
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Vendor Patch
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| Software: | Apache 1.3.x
Apache 2.0.x
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| CVE reference: | CVE-2005-1268
CVE-2005-2088
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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). An RFC 2616 non-compliance error in handling TRACE requests has also been reported.
The vulnerability has been reported in versions prior to 1.3.34, in version 2.0.35 through 2.0.37, 2.0.39, 2.0.40, and in version 2.0.42 through 2.0.54.
Solution:
Update to the fixed version.
http://httpd.apache.org/download.cgi
Apache 1.3.x users:
Update to version 1.3.34.
Apache 2.0.x users:
Update to version 2.0.55.
Provided and/or discovered by:
HTTP request smuggling reported by:
Watchfire
CRL issue reported by:
Marc Stern
Changelog:
2005-08-31: Fixed version available.
2005-10-14: Version 2.0.55 released. Updated "Solution" and "Original Advisory" sections.
2005-10-19: Version 1.3.34 released. Updated "Description", "Solution" and "Original Advisory" sections.
Original Advisory:
Apache.org:
http://www.apache.org/dist/httpd/Announcement2.0.html
http://www.apache.org/dist/httpd/Announcement1.3.html
http://www.apache.org/dist/httpd/CHANGES_1.3
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About this Secunia Advisory
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
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