48afa73af8
During the scheme based normalization, The original authority value is used to replace every host headers. It is an issue, because when the HTX message is modified the blocks may be reorganised to find free space. For instance a defragmentation can be performed. So the address of the authority can change. To perform such rewrite, the new value must be stored in a temporary buffer. It is especially important because the start-line is also updated, so the original authority could be moved, making it invalid. Because of this bug, it is possible to mix HTX block values. There is no overflow but the start-line can be crushed with data from the host header value, making it invalid for the server. So, to fix the issue, the new host header value is now the one in the trash chunk used to rewrite the start line. But in that case, the trash chunk must be allocated to be sure it remains valid when replacing all host headers values. This patch must be backported as far as 2.6.
HAProxy
HAProxy is a free, very fast and reliable reverse-proxy offering high availability, load balancing, and proxying for TCP and HTTP-based applications.
Installation
The INSTALL file describes how to build HAProxy. A list of packages is also available on the wiki.
Getting help
The discourse and the mailing-list are available for questions or configuration assistance. You can also use the slack or IRC channel. Please don't use the issue tracker for these.
The issue tracker is only for bug reports or feature requests.
Documentation
The HAProxy documentation has been split into a number of different files for ease of use. It is available in text format as well as HTML. The wiki is also meant to replace the old architecture guide.
Please refer to the following files depending on what you're looking for:
- INSTALL for instructions on how to build and install HAProxy
- BRANCHES to understand the project's life cycle and what version to use
- LICENSE for the project's license
- CONTRIBUTING for the process to follow to submit contributions
The more detailed documentation is located into the doc/ directory:
- doc/intro.txt for a quick introduction on HAProxy
- doc/configuration.txt for the configuration's reference manual
- doc/lua.txt for the Lua's reference manual
- doc/SPOE.txt for how to use the SPOE engine
- doc/network-namespaces.txt for how to use network namespaces under Linux
- doc/management.txt for the management guide
- doc/regression-testing.txt for how to use the regression testing suite
- doc/peers.txt for the peers protocol reference
- doc/coding-style.txt for how to adopt HAProxy's coding style
- doc/internals for developer-specific documentation (not all up to date)
License
HAProxy is licensed under GPL 2 or any later version, the headers under LGPL 2.1. See the LICENSE file for a more detailed explanation.