4 ms·
It rewrites the syscalls to make them succeed: reading a privileged file? Rewrite to read a non-privileged shadow file. Killing a privileged process? Return suc
by dullgiulio 8y ago
It rewrites the syscalls to make them succeed: reading a privileged file? Rewrite to read a non-privileged shadow file. Killing a privileged process? Return success without killing anything, etc.
Whatever is not rewritten will fail in kernel: there is no security risk.
- xtrapolate 8y ago> "It rewrites the syscalls to make them succeed" Imagine some applications expect the syscall to actually fail (ie. some odd way to test permissions). I fail to grasp how this is a strength. Pulling the rug from under applications is dangerous. You're in a direct battle with internal implementation specifics - you don't want to get into that as an abstraction layer. You don't want to tailor various hacks for specific applications.