Security hole fix

Security hole fix

Post by Klaus Fra » Sat, 10 Jul 1993 17:05:08

Please change /usr/spool/cron and /usr/spool/cron/crontabs permissions
from 1777 to 700 and update your /etc/sy*s script. Check for unwan-
ted items in these directories before you activate the cron daemon.

1. Security Hole Fix?

In linux, compiling and running the following program as a normal user
crashes the system.  I was wondering how to limit the amount of RAM each
person has access to, or setting aside a certain amount or RAM to root.

#include <stdlib.h>
/* Crashes a linux box by eating up all ram */

    while (1)
        malloc(1);    /* Allocate 1 byte of memory */
    return 0;

It might also be alloc, I'm not sure which is for Linux.  This will make
the system unsuable until you do a hard reboot with the power switch.

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