118 lines
3.2 KiB
Groff
118 lines
3.2 KiB
Groff
.\" $NetBSD: paxctl.8,v 1.11 2009/09/17 08:07:17 plunky Exp $
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.\"
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.\" Copyright 2006 Elad Efrat <elad@NetBSD.org>
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.\" Copyright 2008 Christos Zoulas <christos@NetBSD.org>
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.\" All rights reserved.
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.\"
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. The name of the author may not be used to endorse or promote products
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.\" derived from this software without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd September 17, 2009
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.Dt PAXCTL 8
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.Os
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.Sh NAME
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.Nm paxctl
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.Nd list and modify PaX flags associated with an ELF program
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.Sh SYNOPSIS
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.Nm
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.Ar flags
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.Ar program ...
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.Sh DESCRIPTION
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The
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.Nm
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utility is used to list and manipulate PaX flags associated with an ELF
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program.
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The PaX flags signify to the loader the privilege protections to be applied
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to mapped memory pages, and fuller explanations of the specific protections
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can be found in the
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.Xr security 8
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manpage.
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.Pp
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Each flag can be prefixed either with a
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.Dq +
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or a
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.Dq -
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sign to add or remove the flag, respectively.
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.Pp
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The following flags are available:
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.Bl -tag -width flag
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.It a
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Explicitly disable PaX ASLR (Address Space Layout Randomization) for
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.Ar program .
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.It A
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Explicitly enable PaX ASLR for
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.Ar program .
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.It g
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Explicitly disable PaX Segvguard for
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.Ar program .
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.It G
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Explicitly enable PaX Segvguard for
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.Ar program .
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.It m
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Explicitly disable PaX MPROTECT
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.Po Xr mprotect 2
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restrictions
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.Pc
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for
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.Ar program .
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.It M
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Explicitly enable PaX MPROTECT
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.Po Xr mprotect 2
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restrictions
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.Pc
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for
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.Ar program .
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.El
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.Pp
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To view existing flags on a file, execute
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.Nm
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without any flags.
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.Sh SEE ALSO
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.Xr mprotect 2 ,
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.Xr sysctl 3 ,
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.Xr options 4 ,
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.Xr elf 5 ,
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.Xr security 8 ,
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.Xr sysctl 8 ,
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.Xr fileassoc 9
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.Sh HISTORY
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The
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.Nm
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utility first appeared in
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.Nx 4.0 .
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.Pp
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The
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.Nm
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utility is modeled after a tool of the same name available for Linux from the
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PaX project.
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.Sh AUTHORS
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.An Elad Efrat Aq elad@NetBSD.org
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.An Christos Zoulas Aq christos@NetBSD.org
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.Sh BUGS
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The
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.Nm
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utility currently uses
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.Xr elf 5
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.Dq note
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sections to mark executables as PaX Segvguard enabled.
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This will be done using
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.Xr fileassoc 9
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in the future so that we can control who does the marking and
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not altering the binary file signature.
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