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This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.
** Changed in: linux (Ubuntu)
Status: New => Incomplete
** Tags added: trusty
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https://bugs.launchpad.net/bugs/1377267
Title:
On trusty I can break out of pivot_root chroot
Status in “linux” package in Ubuntu:
Incomplete
Bug description:
After doing a pivot_root, it should not be possible to use the
standard well-known 'chroot escape' technique to escape back to the
host root. However, Andrey Vagin found that on 14.04 that is in fact
possible, if you first chroot.
In 14.10, this is NOT possible.
I've uploaded testscripts under
http://people.canonical.com/~serge/chrootintoslave . Download the
cis.* from there into a home directory in a clean vm, make them all
executable, and run "./cis.maintest".
I posted a similar set of scripts (just tweaking how the chroot+chdir
are done after pivot_root) in
http://people.canonical.com/~serge/chrootintoslave.2 - those have the
same results on my system.
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