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Add test for setuid seccomp filter

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Eelco Dolstra 2017-05-29 14:19:11 +02:00
parent cf93397d3f
commit 1d9ab273ba
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2 changed files with 113 additions and 0 deletions
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5
release.nix
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@ -219,6 +219,11 @@ let
nix = build.x86_64-linux; system = "x86_64-linux";
});
tests.setuid = pkgs.lib.genAttrs (pkgs.lib.filter (pkgs.lib.hasSuffix "-linux") systems) (system:
import ./tests/setuid.nix rec {
nix = build.${system}; inherit system;
});
tests.binaryTarball =
with import <nixpkgs> { system = "x86_64-linux"; };
vmTools.runInLinuxImage (runCommand "nix-binary-tarball-test"

108
tests/setuid.nix Normal file
View file

@ -0,0 +1,108 @@
# Verify that Linux builds cannot create setuid or setgid binaries.
{ system, nix }:
with import <nixpkgs/nixos/lib/testing.nix> { inherit system; };
makeTest {
machine =
{ config, lib, pkgs, ... }:
{ virtualisation.writableStore = true;
nix.package = nix;
nix.binaryCaches = [ ];
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 --option build-use-sandbox false -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 --option build-use-sandbox false -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 --option build-use-sandbox false -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 --option build-use-sandbox false -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 --option build-use-sandbox false -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 --option build-use-sandbox false -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 --option build-use-sandbox false -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 --option build-use-sandbox false -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");
'';
}