Mercurial > dropbear
view dbmalloc.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 | d4efb7801fcd |
children | 8dc43b30c6bf |
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#ifndef DBMALLOC_H_ #define DBMALLOC_H_ #include "stdint.h" #include "stdlib.h" #include "options.h" void * m_malloc(size_t size); void * m_calloc(size_t nmemb, size_t size); void * m_strdup(const char * str); void * m_realloc(void* ptr, size_t size); #if DROPBEAR_TRACKING_MALLOC void m_free_direct(void* ptr); void m_malloc_set_epoch(unsigned int epoch); void m_malloc_free_epoch(unsigned int epoch, int dofree); #else /* plain wrapper */ #define m_free_direct free #endif #define m_free(X) do {m_free_direct(X); (X) = NULL;} while (0) #endif /* DBMALLOC_H_ */