Git-Mirrors/qubes-doc
1
0
Fork 0
mirror of https://github.com/QubesOS/qubes-doc.git synced 2024-12-28 16:59:40 -05:00
Code Issues Packages Projects Releases Wiki Activity

Merge remote-tracking branch 'origin/pr/364'

Browse Source 
* origin/pr/364:
  copying-files.md typo: Qubes -> Qubes's
  copying-files.md: fixed 2 typos
This commit is contained in:
Marek Marczykowski-Górecki 2017-04-28 12:13:00 +02:00
commit 09dcbe0aca
No known key found for this signature in database
GPG Key ID: F32894BE9684938A
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
common-tasks/copying-files.md
View File

@ -37,7 +37,7 @@ CLI
On inter-qube file copy security
----------------------------------
The scheme is *secure* because it doesn't allow other qubes to steal the files that are being copied, and also doesn't allow the source qube to overwrite arbitrary file on the destination qube. Also, Qubes file copy scheme doesn't use any sort of virtual block devices for file copy -- instead we use Xen shared memory, which eliminates lots of processing of untrusted data. For example, the receiving qube is *not* forced to parse untrusted partitions or file systems. In this respect our file copy mechanism provides even more security than file copy between two physically separated (air-gapped) machines!
The scheme is *secure* because it doesn't allow other qubes to steal the files that are being copied, and also doesn't allow the source qube to overwrite arbitrary files on the destination qube. Also, Qubes's file copy scheme doesn't use any sort of virtual block devices for file copy -- instead we use Xen shared memory, which eliminates lots of processing of untrusted data. For example, the receiving qube is *not* forced to parse untrusted partitions or file systems. In this respect our file copy mechanism provides even more security than file copy between two physically separated (air-gapped) machines!
However, one should keep in mind that performing a data transfer from *less trusted* to *more trusted* qubes can always be potentially insecure, because the data that we insert might potentially try to exploit some hypothetical bug in the destination qube (e.g. a seemingly innocent JPEG that we copy from an untrusted qube might contain a specially crafted exploit for a bug in JPEG parsing application in the destination qube). This is a general problem and applies to any data transfer between *less trusted to more trusted* qubes. It even applies to the scenario of copying files between air-gapped machines. So, you should always copy data only from *more trusted* to *less trusted* qubes.