On 6/9/21 10:46 PM, Ulrich Windl wrote:
On 5/31/21 4:55 PM, Michael Singer wrote:
Dear Qubes community,
I am looking for a really secure way to use Qubes for searching not
only a hard drive for file names, but for text that is in files.
The goal is to avoid an exploit in the searched files leading to a
takeover of the hard drive by malware.
If your app is working on the disk device and the app only has read
access to it, it'll be quite unlikely that the disk device will be changed.
Likewise if you mount the filesystem read-only, and the user running the
app is unable to re-mount, it's also quite unlikely that the disk will
be changed. You could even try to combine both methods (read-only mount
a read-only block device). However not all filesystems work on a
write-protected block device.
A variant: mount it RO in AppVM1, then attach it to AppVM2 (which by no
means can "remount -rw" it unless interVM-barriers are breached (and
game is over anyways).
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