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Diffstat (limited to 'tools/Get-HardenFlags.ps1')
-rw-r--r-- | tools/Get-HardenFlags.ps1 | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/tools/Get-HardenFlags.ps1 b/tools/Get-HardenFlags.ps1 new file mode 100644 index 00000000..c0785659 --- /dev/null +++ b/tools/Get-HardenFlags.ps1 @@ -0,0 +1,146 @@ +# +# 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 +# +# SPDX-License-Identifier: GPL-2.0-or-later + +#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: +# +# https://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", + "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", + "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", + "libmaxminddb.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", + "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 |