The Apache HTTP server before 1.3.34, and 2.0.x before 2.0.55, when acting as an HTTP proxy, allows remote attackers to poison the web cache, bypass web application firewall protection, and conduct XSS attacks via an HTTP request with both a “Transfer-Encoding: chunked” header and a Content-Length header, which causes Apache to incorrectly handle and forward the body of the request in a way that causes the receiving server to process it as a separate HTTP request, aka “HTTP Request Smuggling.”
docs.info.apple.com/article.html?artnum=302847
lists.trustix.org/pipermail/tsl-announce/2005-October/000354.html
marc.info/?l=apache-httpd-announce&m=112931556417329&w=3
seclists.org/lists/bugtraq/2005/Jun/0025.html
secunia.com/advisories/14530
secunia.com/advisories/17319
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securityreason.com/securityalert/604
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www.vupen.com/english/advisories/2005/2659
www.vupen.com/english/advisories/2006/0789
www.vupen.com/english/advisories/2006/1018
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www.watchfire.com/resources/HTTP-Request-Smuggling.pdf
www1.itrc.hp.com/service/cki/docDisplay.do?docId=c00612828
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oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11452
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