Mercurial > dropbear
view options.h @ 1715:3974f087d9c0
Disallow leading lines before the ident for server (#102)
Per RFC4253 4.2 clients must be able to process other lines of data
before the version string, server behavior is not defined neither
with MUST/SHOULD nor with MAY.
If server process up to 50 lines too - it may cause too long hanging
session with invalid/evil client that consume host resources and
potentially may lead to DDoS on poor embedded boxes.
Let's require first line from client to be version string and fail
early if it's not - matches both RFC and real OpenSSH behavior.
author | Vladislav Grishenko <themiron@users.noreply.github.com> |
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date | Mon, 15 Jun 2020 18:22:18 +0500 |
parents | 2fd52c383163 |
children |
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#ifndef DROPBEAR_OPTIONS_H #define DROPBEAR_OPTIONS_H /* > > > Don't edit this file any more! < < < Local compile-time configuration should be defined in localoptions.h in the build directory. See default_options.h.in for a description of the available options. */ /* Some configuration options or checks depend on system config */ #include "config.h" #ifdef LOCALOPTIONS_H_EXISTS #include "localoptions.h" #endif /* default_options.h is processed to add #ifndef guards */ #include "default_options_guard.h" /* Some other defines that mostly should be left alone are defined * in sysoptions.h */ #include "sysoptions.h" #endif /* DROPBEAR_OPTIONS_H */