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- Update to 0.14.0:

Browse Source 
* Force “C” locale for su/sudo
  * Security: Prevent malicious attempts for command injection
  * Strip environment - Leave only required environment variables (for X & locale) to get into the elevated child process.
  * Make critical error messages less obscure
  * Fixed the layout and line-break
- Remove lxqt-sudo-0.13.0-locale-env.patch: upstreamed
- Move translation from lxqt-l10n into package

OBS-URL: https://build.opensuse.org/package/show/X11:LXQt/lxqt-sudo?expand=0&rev=15
This commit is contained in:
Michael Vetter 2019-01-31 10:30:54 +00:00 committed by Git OBS Bridge
parent 795f8de7a1
commit ab2f095641
7 changed files with 44 additions and 265 deletions
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240
lxqt-sudo-0.13.0-locale-env.patch
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@ -1,240 +0,0 @@
Two patches which fix:
https://github.com/lxqt/lxqt-sudo/pull/42
Started at bsc#1100871
From 07ec9ec14e5d8ff2fe5aba33d9f0a1cd07a4db60 Mon Sep 17 00:00:00 2001
From: Palo Kisa <palo.kisa@gmail.com>
Date: Mon, 12 Sep 2016 11:48:18 +0200
Subject: [PATCH] Sudo: Strip environment
Leave only required environment variables (for X & locale) to get into
the elevated child process.
---
sudo.cpp | 39 ++++++++++++++++++++++++++++++++++++---
1 file changed, 36 insertions(+), 3 deletions(-)
diff --git a/sudo.cpp b/sudo.cpp
index 1530801..a98b75d 100644
--- a/sudo.cpp
+++ b/sudo.cpp
@@ -36,12 +36,14 @@
#include <QSocketNotifier>
#include <QDebug>
#include <QThread>
+#include <QProcessEnvironment>
#include <pty.h>
#include <unistd.h>
#include <memory>
#include <csignal>
#include <sys/wait.h>
#include <fcntl.h>
+#include <iostream>
namespace
{
@@ -80,11 +82,42 @@ namespace
<< QObject::tr("%1 version %2\n").arg(app_master).arg(app_version);
}
+ //Note: array must be sorted to allow usage of binary search
+ static constexpr char const * const ALLOWED_VARS[] = {
+ "DISPLAY"
+ , "LANG", "LANGUAGE", "LC_ADDRESS", "LC_ALL", "LC_COLLATE", "LC_CTYPE", "LC_IDENTIFICATION", "LC_MEASUREMENT"
+ , "LC_MESSAGES", "LC_MONETARY", "LC_NAME", "LC_NUMERIC", "LC_PAPER", "LC_TELEPHONE", "LC_TIME"
+ , "PATH", "QT_PLATFORM_PLUGIN", "QT_QPA_PLATFORMTHEME", "WAYLAND_DISPLAY", "XAUTHORITY"
+ };
+ static constexpr char const * const * const ALLOWED_END = ALLOWED_VARS + sizeof (ALLOWED_VARS) / sizeof (ALLOWED_VARS[0]);
+ struct assert_helper
+ {
+ assert_helper()
+ {
+ Q_ASSERT(std::is_sorted(ALLOWED_VARS, ALLOWED_END
+ , [] (char const * const a, char const * const b) { return strcmp(a, b) < 0; }));
+ }
+ };
+ assert_helper h;
+
inline void env_workarounds()
{
- //cleanup environment
- //pcmanfm-qt will not start if the DBUS_SESSION_BUS_ADDRESS is preserved
- unsetenv("DBUS_SESSION_BUS_ADDRESS");
+ std::cerr << LXQTSUDO << ": Stripping child environment except for: ";
+ std::copy(ALLOWED_VARS, ALLOWED_END - 1, std::ostream_iterator<const char *>{std::cerr, ", "});
+ std::cerr << *(ALLOWED_END - 1) << '\n'; // printing the last separately to avoid trailing comma
+ // cleanup environment, because e.g.:
+ // - pcmanfm-qt will not start if the DBUS_SESSION_BUS_ADDRESS is preserved
+ // - Qt apps may change user's config files permissions if the XDG_* are preserved
+ for (auto const & key : QProcessEnvironment::systemEnvironment().keys())
+ {
+ auto const & i = std::lower_bound(ALLOWED_VARS, ALLOWED_END, key, [] (char const * const a, QString const & b) {
+ return b > a;
+ });
+ if (i == ALLOWED_END || key != *i)
+ {
+ unsetenv(key.toStdString().c_str());
+ }
+ }
}
}
From 406a20279e24539e04cab1c96ff808b3e4e2d163 Mon Sep 17 00:00:00 2001
From: Palo Kisa <palo.kisa@gmail.com>
Date: Tue, 24 Jul 2018 13:13:20 +0200
Subject: [PATCH] sudo: Force "C" locale for su/sudo
We force the su/sudo to communicate with us in the simplest locale and
then set the locale back for the command (by using the magic of shell
interpretation).
---
passworddialog.cpp | 9 +++------
passworddialog.h | 2 +-
sudo.cpp | 44 ++++++++++++++++++++++++++------------------
sudo.h | 1 +
4 files changed, 31 insertions(+), 25 deletions(-)
diff --git a/passworddialog.cpp b/passworddialog.cpp
index fcd2208..6377752 100644
--- a/passworddialog.cpp
+++ b/passworddialog.cpp
@@ -4,7 +4,7 @@
* LXQt - a lightweight, Qt based, desktop toolset
* https://lxqt.org
*
- * Copyright: 2015 LXQt team
+ * Copyright: 2015-2018 LXQt team
* Authors:
* Palo Kisa <palo.kisa@gmail.com>
*
@@ -29,7 +29,7 @@
#include "ui_passworddialog.h"
#include <QIcon>
-PasswordDialog::PasswordDialog(QStringList argv
+PasswordDialog::PasswordDialog(const QString & cmd
, QWidget * parent/* = 0*/
, Qt::WindowFlags f/* = 0*/)
: QDialog(parent, f)
@@ -37,10 +37,7 @@ PasswordDialog::PasswordDialog(QStringList argv
{
ui->setupUi(this);
- ui->commandL->setText(argv.join(QStringLiteral(" ")));
- QString cmd;
- if (0 < argv.size())
- cmd = argv[0];
+ ui->commandL->setText(cmd);
ui->descriptionL->setText(tr("<b>%1</b> needs administrative privileges.\nPlease enter your password.").arg(cmd));
ui->iconL->setPixmap(QIcon::fromTheme("dialog-password").pixmap(64, 64));
setWindowIcon(QIcon::fromTheme("security-high"));
diff --git a/passworddialog.h b/passworddialog.h
index 063b81a..d742a52 100644
--- a/passworddialog.h
+++ b/passworddialog.h
@@ -39,7 +39,7 @@ class PasswordDialog : public QDialog
Q_OBJECT
public:
- PasswordDialog(QStringList argv
+ PasswordDialog(const QString & cmd
, QWidget * parent = 0
, Qt::WindowFlags f = 0);
~PasswordDialog();
diff --git a/sudo.cpp b/sudo.cpp
index f6002e1..1530801 100644
--- a/sudo.cpp
+++ b/sudo.cpp
@@ -4,7 +4,7 @@
* LXQt - a lightweight, Qt based, desktop toolset
* https://lxqt.org
*
- * Copyright: 2015 LXQt team
+ * Copyright: 2015-2018 LXQt team
* Authors:
* Palo Kisa <palo.kisa@gmail.com>
*
@@ -141,16 +141,12 @@ int Sudo::main()
//we were invoked through unknown link (or renamed binary)
usage(tr("%1: no backend chosen!").arg(app_master));
return 1;
- } else if (BACK_SU == mBackend && 1 < mArgs.size())
- {
- QString cmd = mArgs.replaceInStrings(QRegExp(QStringLiteral("^(.*)$")), "'\\1'").join(QStringLiteral(" "));
- QTextStream(stderr) << tr("%1: warning - got multiple arguments for %2 backend, squashing into one: %3")
- .arg(app_master).arg(su_prog).arg(cmd);
- mArgs.erase(++mArgs.begin(), mArgs.end());
- mArgs[0] = std::move(cmd);
}
- mDlg.reset(new PasswordDialog{mArgs});
+ mArgs.replaceInStrings(QStringLiteral("'"), QStringLiteral("'\\''"));
+ mSquashedArgs = mArgs.replaceInStrings(QRegExp(QStringLiteral("^(.*)$")), "'\\1'").join(QStringLiteral(" "));
+
+ mDlg.reset(new PasswordDialog{mSquashedArgs});
mDlg->setModal(true);
lxqtApp->setActiveWindow(mDlg.data());
@@ -169,9 +165,8 @@ int Sudo::main()
void Sudo::child()
{
- int params_cnt = 2 //1. su/sudo & last nullptr
- + 1 //-c for su | -E for sudo
- + mArgs.size();
+ int params_cnt = 3 //1. su/sudo & "shell command" & last nullptr
+ + (BACK_SU == mBackend ? 1 : 3); //-c for su | -E /bin/sh -c for sudo
std::unique_ptr<char const *[]> params{new char const *[params_cnt]};
const char ** param_arg = params.get() + 1;
@@ -179,20 +174,33 @@ void Sudo::child()
if (BACK_SU == mBackend)
{
program = su_prog.toStdString();
- *(param_arg++) = "-c"; //run command
} else
{
program = sudo_prog.toStdString();
*(param_arg++) = "-E"; //preserve environment
+ *(param_arg++) = "/bin/sh";
}
+ *(param_arg++) = "-c"; //run command
params[0] = program.c_str();
- std::vector<std::string> arguments;
- for (const auto & a : mArgs)
- arguments.push_back(a.toStdString());
- for (const auto & a : arguments)
- *(param_arg++) = a.c_str();
+ // Note: we force the su/sudo to communicate with us in the simplest
+ // locale and then set the locale back for the command
+ char const * const env_lc_all = getenv("LC_ALL");
+ setenv("LC_ALL", "C", 1);
+ std::string command;
+ if (env_lc_all == nullptr)
+ {
+ command = "unset LC_ALL; ";
+ } else
+ {
+ command = "LC_ALL='";
+ command += env_lc_all;
+ command += "' ";
+ }
+ command += "exec ";
+ command += mSquashedArgs.toStdString();
+ *(param_arg++) = command.c_str();
*param_arg = nullptr;
diff --git a/sudo.h b/sudo.h
index c3eab94..d7a8c21 100644
--- a/sudo.h
+++ b/sudo.h
@@ -62,6 +62,7 @@ class Sudo : public QObject
QScopedPointer<PasswordDialog> mDlg;
QStringList mArgs;
backend_t mBackend;
+ QString mSquashedArgs;
int mChildPid;
int mPwdFd;

3
lxqt-sudo-0.13.0.tar.xz
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@ -1,3 +0,0 @@
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oid sha256:8e05adf4926eead9fa3015be54a76f67ebf3f7c40e1dea0bcafbcf4c38e548c8
size 16208

16
lxqt-sudo-0.13.0.tar.xz.asc
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@ -1,16 +0,0 @@
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12
lxqt-sudo.changes
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@ -1,3 +1,15 @@
-------------------------------------------------------------------
Thu Jan 31 10:29:34 UTC 2019 - Michael Vetter <mvetter@suse.com>
- Update to 0.14.0:
* Force “C” locale for su/sudo
* Security: Prevent malicious attempts for command injection
* Strip environment - Leave only required environment variables (for X & locale) to get into the elevated child process.
* Make critical error messages less obscure
* Fixed the layout and line-break
- Remove lxqt-sudo-0.13.0-locale-env.patch: upstreamed
- Move translation from lxqt-l10n into package
------------------------------------------------------------------- -------------------------------------------------------------------
Thu Jul 26 13:05:35 UTC 2018 - mvetter@suse.com Thu Jul 26 13:05:35 UTC 2018 - mvetter@suse.com

19
lxqt-sudo.spec
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@ -1,7 +1,7 @@
# #
# spec file for package lxqt-sudo # spec file for package lxqt-sudo
# #
# Copyright (c) 2018 SUSE LINUX GmbH, Nuernberg, Germany. # Copyright (c) 2019 SUSE LINUX GmbH, Nuernberg, Germany.
# #
# All modifications and additions to the file contributed by third parties # All modifications and additions to the file contributed by third parties
# remain the property of their copyright owners, unless otherwise agreed # remain the property of their copyright owners, unless otherwise agreed
@ -12,12 +12,12 @@
# license that conforms to the Open Source Definition (Version 1.9) # license that conforms to the Open Source Definition (Version 1.9)
# published by the Open Source Initiative. # published by the Open Source Initiative.
# Please submit bugfixes or comments via http://bugs.opensuse.org/ # Please submit bugfixes or comments via https://bugs.opensuse.org/
# #
Name: lxqt-sudo Name: lxqt-sudo
Version: 0.13.0 Version: 0.14.0
Release: 0 Release: 0
Summary: GUI frontend for sudo Summary: GUI frontend for sudo
License: LGPL-2.1-only License: LGPL-2.1-only
@ -26,8 +26,7 @@ URL: http://lxqt.org
Source: https://github.com/lxqt/%{name}/releases/download/%{version}/%{name}-%{version}.tar.xz Source: https://github.com/lxqt/%{name}/releases/download/%{version}/%{name}-%{version}.tar.xz
Source1: https://github.com/lxqt/%{name}/releases/download/%{version}/%{name}-%{version}.tar.xz.asc Source1: https://github.com/lxqt/%{name}/releases/download/%{version}/%{name}-%{version}.tar.xz.asc
Source2: %{name}.keyring Source2: %{name}.keyring
Patch1: lxqt-sudo-0.13.0-locale-env.patch BuildRequires: cmake >= 3.1.0
BuildRequires: cmake >= 3.0.2
BuildRequires: gcc-c++ BuildRequires: gcc-c++
BuildRequires: lxqt-build-tools-devel >= 0.5.0 BuildRequires: lxqt-build-tools-devel >= 0.5.0
BuildRequires: pkgconfig BuildRequires: pkgconfig
@ -44,9 +43,10 @@ When invoked it simply spawns child sudo process with requested command (and
arguments). If sudo requests user's password, the GUI password dialog is shown arguments). If sudo requests user's password, the GUI password dialog is shown
and (after submit) the password is provided to sudo. and (after submit) the password is provided to sudo.
%lang_package
%prep %prep
%setup -q %setup -q
%patch1 -p1
%build %build
%cmake -DPULL_TRANSLATIONS=No %cmake -DPULL_TRANSLATIONS=No
@ -55,6 +55,8 @@ make %{?_smp_mflags}
%install %install
%cmake_install %cmake_install
%find_lang %{name} --with-qt
%files %files
%license LICENSE %license LICENSE
%doc AUTHORS %doc AUTHORS
@ -63,4 +65,9 @@ make %{?_smp_mflags}
%{_mandir}/man?/%{name}.* %{_mandir}/man?/%{name}.*
%{_mandir}/man?/lxsu*.* %{_mandir}/man?/lxsu*.*
%files lang -f %{name}.lang
%dir %{_datadir}/lxqt
%dir %{_datadir}/lxqt/translations
%{_datadir}/lxqt/translations/lxqt-sudo
%changelog %changelog