Re: Unexecutable stack

Zachary Amsden (zamsden@clock.engr.sgi.com)
Mon, 27 Dec 1999 15:08:26 -0800


Just for reference, here are the facts:

1) Not all architectures support this
2) It breaks trampoline code
3) It doesn't provide full protection
4) It does raise the bar significantly, in that it stops script kiddies
5) Most modern daemons are smart enough to switch to unprivileged UIDs when
parsing user input, and use strnxxx library functions.

I would say that all considered, it is not worthwhile unless you need to run
a bunch of old setuid programs. In that case, you are taking a big risk even
with the patch.

-- 
Zachary Amsden  zamsden@engr.sgi.com  (650) 933-6919  09U-510  Core Protocols

- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu Please read the FAQ at http://www.tux.org/lkml/