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#
# Get-HardenFlags - Checks hardening flags on the binaries.
#
# Copyright 2015 Graham Bloice <graham.bloice@trihedral.com>
#
# Wireshark - Network traffic analyzer
# By Gerald Combs <gerald@wireshark.org>
# Copyright 1998 Gerald Combs
#
# 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; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#requires -version 2
# Get-HardenFlags does:
# call the dumpbin utility to get the binary header flags
# on all the binaries in the distribution, and then filters
# for the NXCOMPAT and DYNAMICBASE flags.
# This script will probably fail for the forseeable future.
#
# Many of our third-party libraries are compiled using MinGW-w64. Its version
# of `ld` doesn't enable the dynamicbase, nxcompat, or high-entropy-va flags
# by default. When you *do* pass --dynamicbase it strips the relocation
# section of the executable:
#
# https://sourceware.org/bugzilla/show_bug.cgi?id=19011
#
# As a result, none of the distributions that produce Windows applications
# and libraries have any sort of hardening flags enabled:
#
# http://mingw-w64.org/doku.php/download
#
<#
.SYNOPSIS
Checks the NXCOMPAT and DYNAMICBASE flags on all the binaries.
.DESCRIPTION
This script downloads and extracts third-party libraries required to compile
Wireshark.
.PARAMETER BinaryDir
Specifies the directory where the binaries may be found.
.INPUTS
-BinaryDir Directory containing the binaries to be checked.
.OUTPUTS
Any binary that doesn't have the flags is written to the error stream
.EXAMPLE
C:\PS> .\tools\Get-HardenFlags.ps1 -BinaryDir run\RelWithDebInfo
#>
Param(
[Parameter(Mandatory=$true, Position=0)]
[String]
$BinaryDir
)
# Create a list of 3rd party binaries that are not hardened
$SoftBins = (
"libpixmap.dll",
"libwimp.dll",
"libgail.dll",
"airpcap.dll",
"comerr32.dll",
"gspawn-win32-helper-console.exe",
"gspawn-win32-helper.exe",
"k5sprt32.dll",
"krb5_32.dll",
"libatk-1.0-0.dll",
"libcairo-2.dll",
"libffi-6.dll",
"libfontconfig-1.dll",
"libfreetype-6.dll",
"libgcc_s_sjlj-1.dll",
"libgcrypt-20.dll",
"libgdk-win32-2.0-0.dll",
"libgdk_pixbuf-2.0-0.dll",
"libGeoIP-1.dll",
"libgio-2.0-0.dll",
"libglib-2.0-0.dll",
"libgmodule-2.0-0.dll",
"libgmp-10.dll",
"libgnutls-28.dll",
"libgobject-2.0-0.dll",
"libgpg-error-0.dll",
"libgtk-win32-2.0-0.dll",
"libharfbuzz-0.dll",
"libhogweed-2-4.dll",
"libintl-8.dll",
"libjasper-1.dll",
"libjpeg-8.dll",
"liblzma-5.dll",
"libnettle-4-6.dll",
"libp11-kit-0.dll",
"libpango-1.0-0.dll",
"libpangocairo-1.0-0.dll",
"libpangoft2-1.0-0.dll",
"libpangowin32-1.0-0.dll",
"libpixman-1-0.dll",
"libpng15-15.dll",
"libtasn1-6.dll",
"libtiff-5.dll",
"libxml2-2.dll",
# The x64 ones that are different
"comerr64.dll",
"gspawn-win64-helper-console.exe",
"gspawn-win64-helper.exe",
"k5sprt64.dll",
"krb5_64.dll",
"libgcc_s_seh-1.dll",
"libgpg-error6-0.dll",
"libpng16-16.dll",
# Unfortunately the nsis uninstaller is not hardened.
"uninstall.exe"
)
# CD into the bindir, allows Resolve-Path to work in relative mode.
Push-Location $BinaryDir
[Console]::Error.WriteLine("Checking in $BinaryDir for unhardened binaries:")
# Retrieve the list of binaries. -Filter is quicker than -Include, but can only handle one item
$Binaries = Get-ChildItem -Path $BinaryDir -Recurse -Include *.exe,*.dll
# Number of "soft" binaries found
$Count = 0;
# Iterate over the list
$Binaries | ForEach-Object {
# Get the flags
$flags = dumpbin $_ /HEADERS;
# Check for the required flags
$match = $flags | Select-String -Pattern "NX compatible", "Dynamic base"
if ($match.Count -ne 2) {
# Write-Error outputs error records, we simply want the filename
[Console]::Error.WriteLine((Resolve-Path $_ -Relative))
# Don't count files that won't ever be OK
if ($SoftBins -notcontains (Split-Path $_ -Leaf)) {
$Count++
}
}
}
exit $Count
|
