Re: fs/crypto: root read-access without key

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 




Hi Richard,


 As of now root[1] can access the plain-text when the data is cached
 by the user-with-the-key and, root gets error no-key when data is
 not cached by the user-with-the-key. I think this behavior is a
 bug if not, wrong design, or looks like I am missing something.

 [1] for that matter any user who has read access to the files but
 does not have the keys.

Well, as soon the key is loaded plaintext of pages and filenames will be
stored in page- and dcache and any users that can access the files will
see the plaintext.

If you want to keep /secret really secret you have to apply correct DAC/MAC
permissions as well.
Or put /secret into a private mount namespace.

Right. Keeping the secret really secret wasn't the point I was trying to make instead, irrespective of whether the plain-text is cached or not-cached by the key-user, the behavior for the no-key-user access has to be constant. More about it is in the email above.

Thanks,
-Anand




[Index of Archives]     [Linux Ext4 Filesystem]     [Union Filesystem]     [Filesystem Testing]     [Ceph Users]     [Ecryptfs]     [AutoFS]     [Kernel Newbies]     [Share Photos]     [Security]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux Cachefs]     [Reiser Filesystem]     [Linux RAID]     [Samba]     [Device Mapper]     [CEPH Development]
  Powered by Linux