On Fri, 12 May 2006, Norbert François wrote:
Hi...
I was wondering how an attacker can bypass a chrooted environement. A
(common) technique consist in finding a vulnerable program (in the
chrooted environnement) and injecting it a shellcode (i.e
../../../../../../../bin/bash for ex.) by BoF. But normally, in the
chrooted environement, you volontarily add only necessary tools (like
ls, cat, less...), and vulnerable softwares are uncommon...
So... how do they this "exploit" of bypassing the chroot ?
They chroot more times than the kernel can handle. The system then fails
open without the chroot.
--
"Waiter! This lambchop tastes like an old sock!" - Sheri Lewis
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