CVE-2017-7656

In Eclipse Jetty, versions 9.2.x and older, 9.3.x (all configurations), and
9.4.x (non-default configuration with RFC2616 compliance enabled), HTTP/0.9
is handled poorly. An HTTP/1 style request line (i.e. method space URI
space version) that declares a version of HTTP/0.9 was accepted and treated
as a 0.9 request. If deployed behind an intermediary that also accepted and
passed through the 0.9 version (but did not act on it), then the response
sent could be interpreted by the intermediary as HTTP/1 headers. This could
be used to poison the cache if the server allowed the origin client to
generate arbitrary content in the response.

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