tree 12895539582b7d368f9cb862608843d9b047f7d3
parent 2cb3be76bf1435326984907d1fa04b6238dd0a03
author Tim Duesterhus <tim@bastelstu.be> 1583798140 +0100
committer Willy Tarreau <w@1wt.eu> 1653399485 +0200
encoding latin1

BUG/MEDIUM: http: Properly reject non-HTTP/1.x protocols

This patch hardens the verification of the HTTP/1.x version line
(i.e. the first line within an HTTP/1.x request) to verify that
the protocol name within the version actually reads "HTTP".

Previously protocols that superficially resembled the wire-format
of HTTP/1.x and having a 4-letter acronym as the protocol name, such
as RTSP would pass this check.

This patch fixes GitHub issue #540, it must be backported to all
supported versions. The legacy, non-HTX parser is affected as well,
a fix must be created for it as well.

Note that such protocols can still be used when option
accept-invalid-http-request is set.