Substituting the memcpy_s() and memmove_s() functions for the memcpy() and memmove() functions can help guard against software vulnerabilities.
Copying characters from one memory location to another.
C++, C, UNIX, Win32
Attacker executes arbitrary code on machine with permissions of compromised process or changes the behavior of the program.
The memcpy() and memmove() functions are a source of buffer overflow vulnerabilities.
The memcpy_s() and memmove_s() functions defined in ISO/IEC
TR 24731 are similar to the corresponding less-secure memcpy() and
memmove() functions but provide some additional safeguards. The secure
versions of these functions add an additional argument that specifies the
maximum size of the destination. The memcpy_s() and
memmove_s() functions return zero if successful. A nonzero value is
returned if either the source or destination pointer is NULL, if the specified
number of characters to copy/move is greater than the maximum size of the
destination buffer, or the number of characters to copy/move or the maximum
size of the destination buffer is greater than
ISO/IEC. ISO/IEC 9899 Second edition 1999-12-01 Programming languages — C. International Organization for Standardization, 1999.
ISO/IEC. ISO/IEC TR 24731 Extensions to the C library -- Part 1: Bounds-checking interfaces. International Organization for Standardization, 2005.
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