lkml.org 
[lkml]   [2013]   [Mar]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: CLONE_NEWUSER|CLONE_FS root exploit
Kees Cook <keescook@chromium.org> writes:

> Hi,
>
> It seem like we should block (at least) this combination. On 3.9, this
> exploit works once uidmapping is added.
>
> http://www.openwall.com/lists/oss-security/2013/03/13/10

Yes. That is a bad combination. It let's chroot confuse privileged
processes.

Now to figure out if this is easier to squash by adding a user_namespace
to fs_struct or by just forbidding this combination.

Eric


\
 
 \ /
  Last update: 2013-03-13 19:41    [W:0.043 / U:2.788 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site