| 1 | //go:build linux && rootrunner |
| 2 | |
| 3 | package host |
| 4 | |
| 5 | import ( |
| 6 | "os" |
| 7 | "path/filepath" |
| 8 | "testing" |
| 9 | |
| 10 | "github.com/carlosframework/platform/internal/hostbox" |
| 11 | "github.com/carlosframework/platform/internal/rootstate" |
| 12 | "golang.org/x/sys/unix" |
| 13 | ) |
| 14 | |
| 15 | func TestPlan14GenerationPrivateJournalRootRunner(t *testing.T) { |
| 16 | dir := generationRootRunnerDir(t) |
| 17 | private := filepath.Join(dir, "private") |
| 18 | if err := os.Mkdir(private, 0700); err != nil { |
| 19 | t.Fatal(err) |
| 20 | } |
| 21 | path := filepath.Join(private, "journals.db") |
| 22 | journal, err := hostbox.OpenLaunchJournal(path) |
| 23 | if err != nil { |
| 24 | t.Fatal(err) |
| 25 | } |
| 26 | t.Cleanup(func() { journal.Close() }) |
| 27 | if _, err := hostbox.NewJournalService(journal); err != nil { |
| 28 | t.Fatal(err) |
| 29 | } |
| 30 | check := func(t *testing.T, refuse bool) { |
| 31 | t.Helper() |
| 32 | reader, err := openGenerationLaunchInventory(path) |
| 33 | if reader != nil { |
| 34 | defer reader.Close() |
| 35 | } |
| 36 | if (err != nil) != refuse { |
| 37 | t.Fatalf("private journal reader: refuse=%v error=%v", refuse, err) |
| 38 | } |
| 39 | if err == nil { |
| 40 | if _, err := reader.GenerationPayloads(t.Context()); err != nil { |
| 41 | t.Fatal(err) |
| 42 | } |
| 43 | if _, err := reader.GenerationLaunches(t.Context()); err != nil { |
| 44 | t.Fatal(err) |
| 45 | } |
| 46 | } |
| 47 | } |
| 48 | if f, err := rootstate.OpenTrustedFile(path); err == nil { |
| 49 | f.Close() |
| 50 | t.Fatal("public-file opener unexpectedly accepted private ancestry") |
| 51 | } |
| 52 | check(t, false) |
| 53 | for _, suffix := range []string{"", "-wal", "-shm"} { |
| 54 | for _, attack := range []string{"writable", "service-owned", "symlink", "hardlink", "fifo", "directory"} { |
| 55 | t.Run("journal"+suffix+"/"+attack, func(t *testing.T) { |
| 56 | leaf := path + suffix |
| 57 | info, err := os.Stat(leaf) |
| 58 | if err != nil { |
| 59 | t.Fatal(err) |
| 60 | } |
| 61 | must := func(err error) { |
| 62 | t.Helper() |
| 63 | if err != nil { |
| 64 | t.Fatal(err) |
| 65 | } |
| 66 | } |
| 67 | switch attack { |
| 68 | case "writable": |
| 69 | must(os.Chmod(leaf, 0666)) |
| 70 | defer func() { must(os.Chmod(leaf, info.Mode().Perm())) }() |
| 71 | case "service-owned": |
| 72 | must(os.Chown(leaf, 65534, 65534)) |
| 73 | defer func() { must(os.Chown(leaf, 0, 0)) }() |
| 74 | case "hardlink": |
| 75 | must(os.Link(leaf, leaf+".alias")) |
| 76 | defer func() { must(os.Remove(leaf + ".alias")) }() |
| 77 | default: |
| 78 | must(os.Rename(leaf, leaf+".saved")) |
| 79 | defer func() { |
| 80 | must(os.Remove(leaf)) |
| 81 | must(os.Rename(leaf+".saved", leaf)) |
| 82 | }() |
| 83 | switch attack { |
| 84 | case "symlink": |
| 85 | must(os.Symlink(filepath.Base(leaf)+".saved", leaf)) |
| 86 | case "fifo": |
| 87 | must(unix.Mkfifo(leaf, 0600)) |
| 88 | case "directory": |
| 89 | must(os.Mkdir(leaf, 0700)) |
| 90 | } |
| 91 | } |
| 92 | check(t, true) |
| 93 | }) |
| 94 | check(t, false) |
| 95 | } |
| 96 | } |
| 97 | for _, attack := range []string{"writable", "service-owned", "symlink"} { |
| 98 | t.Run("ancestor/"+attack, func(t *testing.T) { |
| 99 | must := func(err error) { |
| 100 | t.Helper() |
| 101 | if err != nil { |
| 102 | t.Fatal(err) |
| 103 | } |
| 104 | } |
| 105 | switch attack { |
| 106 | case "writable": |
| 107 | must(os.Chmod(private, 0777)) |
| 108 | defer func() { must(os.Chmod(private, 0700)) }() |
| 109 | case "service-owned": |
| 110 | must(os.Chown(private, 65534, 65534)) |
| 111 | defer func() { must(os.Chown(private, 0, 0)) }() |
| 112 | case "symlink": |
| 113 | must(os.Rename(private, private+".saved")) |
| 114 | must(os.Symlink(private+".saved", private)) |
| 115 | defer func() { |
| 116 | must(os.Remove(private)) |
| 117 | must(os.Rename(private+".saved", private)) |
| 118 | }() |
| 119 | } |
| 120 | check(t, true) |
| 121 | }) |
| 122 | check(t, false) |
| 123 | } |
| 124 | if err := journal.Close(); err != nil { |
| 125 | t.Fatal(err) |
| 126 | } |
| 127 | check(t, false) |
| 128 | } |
| 129 | |
amadan