hardening-check

Langue: en

Version: 2010-04-23 (ubuntu - 24/10/10)

Section: 1 (Commandes utilisateur)

Sommaire

NAME

hardening-check - check binaries for security hardening features

SYNOPSIS

Examine a given set of ELF binaries and check for several security hardening features, failing if they are not all found.

DESCRIPTION

This utility checks a given list of ELF binaries for several security hardening features that can be compiled into an executable. These features are:
Position Independent Executable
This indicates that the executable was built in such a way (PIE) that the ``text'' section of the program can be relocated in memory. To take full advantage of this feature, the executing kernel must support text Address Space Layout Randomization (ASLR).
Stack Protected
This indicates that the executable was compiled with the gcc(1) option -fstack-protector. The program will be resistant to have its stack overflowed.
Fortify Source functions
This indicates that the executable was compiled with -D_FORTIFY_SOURCE=2 and -O2 or higher. This causes certain unsafe glibc functions with their safer counterparts (e.g. strncpy instead of strcpy).
Read-only relocations
This indicates that the executable was build with -Wl,-z,relro to have ELF markings (RELRO) that ask the runtime linker to mark any regions of the relocation table as ``read-only'' if they were resolved before execution begins. This reduces the possible areas of memory in a program that can be used by an attacker that performs a successful memory corruption exploit.
Immediate binding
This indicates that the executable was built with -Wl,-z,now to have ELF markings (BIND_NOW) that ask the runtime linker to resolve all relocations before starting program execution. When combined with RELRO above, this further reduces the regions of memory available to memory corruption attacks.

OPTIONS

-p
No not require that the checked binaries be built as PIE.
-s
No not require that the checked binaries be built with the stack protector.
-f
No not require that the checked binaries be built with Fority Source.
-r
No not require that the checked binaries be built with RELRO.
-b
No not require that the checked binaries be built with BIND_NOW.
-q
Only report failures.

RETURN VALUE

When all checked binaries have all checkable hardening features detected, this program will finish with an exit code of 0. If any check fails, the exit code with be 1. Individual checks can be disabled via command line options.

AUTHOR

Kees Cook <kees@debian.org> Copyright 2009 Kees Cook <kees@debian.org>.

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; version 2 or later.

SEE ALSO

gcc(1), hardening-wrapper(1)