security : check /proc is mounted with secure options

Signed-off-by: Shahriyar Jalayeri <[email protected]>

Author: shjala

tests/sec/remote.go

@@ -1,6 +1,7 @@
 package sec_test
 
 import (
+	"encoding/json"
 	"fmt"
 	"io"
 	"os"
@@ -11,6 +12,12 @@ import (
 	"github.com/lf-edge/eden/pkg/utils"
 )
 
+type mount struct {
+	Point   string `json:"point"`
+	Type    string `json:"type"`
+	Options string `json:"options"`
+}
+
 type remoteNode struct {
 	openEVEC *openevec.OpenEVEC
 }
@@ -86,3 +93,32 @@ func (node *remoteNode) readFile(fileName string) ([]byte, error) {
 	command := fmt.Sprintf("cat %s", fileName)
 	return node.runCommand(command)
 }
+
+func (node *remoteNode) getMountPoints(mtype string) ([]mount, error) {
+	mount_command := "mount -l"
+	if mtype != "" {
+		mount_command = fmt.Sprintf("mount -l -t %s", mtype)
+	}
+
+	command := mount_command + ` | awk '
+	BEGIN { print " [ "}
+	{
+		printf " %s {\"point\": \"%s\", \"type\": \"%s\", \"options\": \"%s\"}", separator, $3, $5, $6;
+		separator = ",";
+	}
+	END { print " ] " }
+	'`
+
+	out, err := node.runCommand(command)
+	if err != nil {
+		return nil, err
+	}
+
+	var mounts []mount
+	if err := json.Unmarshal(out, &mounts); err != nil {
+		return nil, err
+
+	}
+
+	return mounts, nil
+}

tests/sec/sec_test.go

@@ -93,7 +93,6 @@ func TestMain(m *testing.M) {
 func TestAppArmorEnabled(t *testing.T) {
 	log.Println("TestAppArmorEnabled started")
 	defer log.Println("TestAppArmorEnabled finished")
-	t.Parallel()
 
 	edgeNode := tc.GetEdgeNode(tc.WithTest(t))
 	tc.WaitForState(edgeNode, 60)
@@ -108,3 +107,33 @@ func TestAppArmorEnabled(t *testing.T) {
 		t.Fatal("AppArmor is not enabled")
 	}
 }
+
+func TestCheckProcMountOptions(t *testing.T) {
+	log.Println("TestCheckProcMountOptions started")
+	defer log.Println("TestCheckProcMountOptions finished")
+
+	edgeNode := tc.GetEdgeNode(tc.WithTest(t))
+	tc.WaitForState(edgeNode, 60)
+
+	procMounts, err := rnode.getMountPoints("proc")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	for _, mount := range procMounts {
+		// check if mount options contains nosuid, nodev and noexec, hidepid=2
+		if !strings.Contains(mount.Options, "nosuid") {
+			t.Fatalf("Mount options for /proc on %s doesn't contain nosuid", mount.Point)
+		}
+		if !strings.Contains(mount.Options, "nodev") {
+			t.Fatalf("Mount options for /proc on %s doesn't contain nodev", mount.Point)
+		}
+		if !strings.Contains(mount.Options, "noexec") {
+			t.Fatalf("Mount options for /proc on %s doesn't contain noexec", mount.Point)
+		}
+		if !strings.Contains(mount.Options, "hidepid=2") {
+			// TODO: set hidepid=2 and make this a fatal error
+			t.Logf("[!!!WARNING!!!] Mount options for /proc on %s doesn't contain hidepid=2", mount.Point)
+		}
+	}
+}