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|
# Verify that Linux builds cannot create setuid or setgid binaries.
{ nixpkgs, system, overlay }:
with import (nixpkgs + "/nixos/lib/testing.nix") {
inherit system;
extraConfigurations = [ { nixpkgs.overlays = [ overlay ]; } ];
};
makeTest {
machine =
{ config, lib, pkgs, ... }:
{ virtualisation.writableStore = true;
nix.binaryCaches = lib.mkForce [ ];
nix.nixPath = [ "nixpkgs=${lib.cleanSource pkgs.path}" ];
virtualisation.pathsInNixDB = [ pkgs.stdenv pkgs.pkgsi686Linux.stdenv ];
};
testScript = { nodes }:
''
startAll;
# Copying to /tmp should succeed.
$machine->succeed('nix-build --no-sandbox -E \'(with import <nixpkgs> {}; runCommand "foo" {} "
mkdir -p $out
cp ${pkgs.coreutils}/bin/id /tmp/id
")\' ');
$machine->succeed('[[ $(stat -c %a /tmp/id) = 555 ]]');
$machine->succeed("rm /tmp/id");
# Creating a setuid binary should fail.
$machine->fail('nix-build --no-sandbox -E \'(with import <nixpkgs> {}; runCommand "foo" {} "
mkdir -p $out
cp ${pkgs.coreutils}/bin/id /tmp/id
chmod 4755 /tmp/id
")\' ');
$machine->succeed('[[ $(stat -c %a /tmp/id) = 555 ]]');
$machine->succeed("rm /tmp/id");
# Creating a setgid binary should fail.
$machine->fail('nix-build --no-sandbox -E \'(with import <nixpkgs> {}; runCommand "foo" {} "
mkdir -p $out
cp ${pkgs.coreutils}/bin/id /tmp/id
chmod 2755 /tmp/id
")\' ');
$machine->succeed('[[ $(stat -c %a /tmp/id) = 555 ]]');
$machine->succeed("rm /tmp/id");
# The checks should also work on 32-bit binaries.
$machine->fail('nix-build --no-sandbox -E \'(with import <nixpkgs> { system = "i686-linux"; }; runCommand "foo" {} "
mkdir -p $out
cp ${pkgs.coreutils}/bin/id /tmp/id
chmod 2755 /tmp/id
")\' ');
$machine->succeed('[[ $(stat -c %a /tmp/id) = 555 ]]');
$machine->succeed("rm /tmp/id");
# The tests above use fchmodat(). Test chmod() as well.
$machine->succeed('nix-build --no-sandbox -E \'(with import <nixpkgs> {}; runCommand "foo" { buildInputs = [ perl ]; } "
mkdir -p $out
cp ${pkgs.coreutils}/bin/id /tmp/id
perl -e \"chmod 0666, qw(/tmp/id) or die\"
")\' ');
$machine->succeed('[[ $(stat -c %a /tmp/id) = 666 ]]');
$machine->succeed("rm /tmp/id");
$machine->fail('nix-build --no-sandbox -E \'(with import <nixpkgs> {}; runCommand "foo" { buildInputs = [ perl ]; } "
mkdir -p $out
cp ${pkgs.coreutils}/bin/id /tmp/id
perl -e \"chmod 04755, qw(/tmp/id) or die\"
")\' ');
$machine->succeed('[[ $(stat -c %a /tmp/id) = 555 ]]');
$machine->succeed("rm /tmp/id");
# And test fchmod().
$machine->succeed('nix-build --no-sandbox -E \'(with import <nixpkgs> {}; runCommand "foo" { buildInputs = [ perl ]; } "
mkdir -p $out
cp ${pkgs.coreutils}/bin/id /tmp/id
perl -e \"my \\\$x; open \\\$x, qw(/tmp/id); chmod 01750, \\\$x or die\"
")\' ');
$machine->succeed('[[ $(stat -c %a /tmp/id) = 1750 ]]');
$machine->succeed("rm /tmp/id");
$machine->fail('nix-build --no-sandbox -E \'(with import <nixpkgs> {}; runCommand "foo" { buildInputs = [ perl ]; } "
mkdir -p $out
cp ${pkgs.coreutils}/bin/id /tmp/id
perl -e \"my \\\$x; open \\\$x, qw(/tmp/id); chmod 04777, \\\$x or die\"
")\' ');
$machine->succeed('[[ $(stat -c %a /tmp/id) = 555 ]]');
$machine->succeed("rm /tmp/id");
'';
}
|
