Patched base.c file for the CVE-2012-0056 root privilege escalation exploit for the 3.0.17 VServer kernel

Hello everyone,

The kernel >=2.6.39 are vulnerable to a privilege escalation exploit 
related to /proc/<pid>/mem, i tested one of the available exploit on a 
3.0.9 VServer kernel and it allow any unprivileged user on the host 
system but also on guests to gain root privilege ; for more infos about 
it : http://blog.zx2c4.com/749

I patched a VServer patched base.c with the Linus patch 
(http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=e268337dfe26dfc7efd422a804dbb27977a3cccc#patch1) 
from the 3.0.17 sources (from the linux-source-3.0.17-vs2.3.2.1-beng 
package), i had to manually patch the chunck #1 which was rejected at 
first but the others didnt make any complaint.

Here is the patched base.c file : http://jbboin.phpnet.org/base.c

I am now compiling a kernel package with this patch, will share the 
package as soon as it finished compiling (and if it seems to work).


Regards.