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SubjectRe: How to fix the ptrace flaw without rebooting
Chuck Ebbert ( wrote:
> Author: Chuck Ebbert
> Adapted from: Phrack Inc., Volume 0x0b, Issue 0x3a, Phile #0x07
> Directions: Run this program as root on an x86 machine.
> It will disable the ptrace system call, thus
> fixing the Linux 'ptrace flaw'. (It will also
> break strace, debugging tools and User Mode Linux.)
> WARNING: Your computer may crash or do other strange things
> if you run this program as root. No warranty.

If you can't reboot to apply a security fix, you've got a serious problem.

A better fix in a running system is to simply disable dynamic module
loading: echo /no/such/file > /proc/sys/kernel/modprobe
At the very least you can be sure your machine won't crash this way ;-)

Erik Hensema <>
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